init

Example/GMRefresh.xcworkspace/contents.xcworkspacedata

+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:GMRefresh.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

Example/GMRefresh/GMTableViewController.h

+//
+//  GMTableViewController.h
+//  GMRefresh
+//
+//  Created by wangyang on 16/5/3.
+//  Copyright © 2016年 wangyang. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface GMTableViewController : UITableViewController
+
+@end

Example/GMRefresh/GMTableViewController.m

+//
+//  GMTableViewController.m
+//  GMRefresh
+//
+//  Created by wangyang on 16/5/3.
+//  Copyright © 2016年 wangyang. All rights reserved.
+//
+
+#import "GMTableViewController.h"
+#import <GMRefresh/GMRefreshHeader.h>
+#import <GMRefresh/GMRefreshFooter.h>
+
+@interface GMTableViewController ()
+
+@end
+
+@implementation GMTableViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.tableView.mj_header = [GMRefreshHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];
+    GMRefreshFooter *footer = [GMRefreshFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];
+    self.tableView.mj_footer = footer;
+}
+
+- (void)loadNewData {
+
+}
+@end

Example/Podfile.lock

+PODS:
+  - GMRefresh (0.1.0):
+    - MJRefresh (~> 3.1.0)
+  - MJRefresh (3.1.0)
+
+DEPENDENCIES:
+  - GMRefresh (from `../`)
+
+EXTERNAL SOURCES:
+  GMRefresh:
+    :path: "../"
+
+SPEC CHECKSUMS:
+  GMRefresh: fc60ee05785ff73b535d5b933e1c7f13cdd6ede0
+  MJRefresh: 743e6404967d1c2c688472ea3ecfde247d872db4
+
+COCOAPODS: 0.39.0

Example/Pods/Headers/Private/GMRefresh/GMRefresh.h

+../../../../../GMRefresh/Classes/GMRefresh.h
\ No newline at end of file

Example/Pods/Headers/Private/GMRefresh/GMRefreshConstant.h

+../../../../../GMRefresh/Classes/GMRefreshConstant.h
\ No newline at end of file

Example/Pods/Headers/Private/GMRefresh/GMRefreshFooter.h

+../../../../../GMRefresh/Classes/GMRefreshFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/GMRefresh/GMRefreshHeader.h

+../../../../../GMRefresh/Classes/GMRefreshHeader.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefresh.h

+../../../MJRefresh/MJRefresh/MJRefresh.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshAutoFooter.h

+../../../MJRefresh/MJRefresh/Base/MJRefreshAutoFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshAutoGifFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoGifFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshAutoNormalFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoNormalFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshAutoStateFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoStateFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshBackFooter.h

+../../../MJRefresh/MJRefresh/Base/MJRefreshBackFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshBackGifFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackGifFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshBackNormalFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackNormalFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshBackStateFooter.h

+../../../MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackStateFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshComponent.h

+../../../MJRefresh/MJRefresh/Base/MJRefreshComponent.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshConst.h

+../../../MJRefresh/MJRefresh/MJRefreshConst.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshFooter.h

+../../../MJRefresh/MJRefresh/Base/MJRefreshFooter.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshGifHeader.h

+../../../MJRefresh/MJRefresh/Custom/Header/MJRefreshGifHeader.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshHeader.h

+../../../MJRefresh/MJRefresh/Base/MJRefreshHeader.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshNormalHeader.h

+../../../MJRefresh/MJRefresh/Custom/Header/MJRefreshNormalHeader.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/MJRefreshStateHeader.h

+../../../MJRefresh/MJRefresh/Custom/Header/MJRefreshStateHeader.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/UIScrollView+MJExtension.h

+../../../MJRefresh/MJRefresh/UIScrollView+MJExtension.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/UIScrollView+MJRefresh.h

+../../../MJRefresh/MJRefresh/UIScrollView+MJRefresh.h
\ No newline at end of file

Example/Pods/Headers/Private/MJRefresh/UIView+MJExtension.h

+../../../MJRefresh/MJRefresh/UIView+MJExtension.h
\ No newline at end of file

Example/Pods/Local Podspecs/GMRefresh.podspec.json

+{
+  "name": "GMRefresh",
+  "version": "0.1.0",
+  "summary": "A short description of GMRefresh.",
+  "homepage": "https://github.com/<GITHUB_USERNAME>/GMRefresh",
+  "license": "MIT",
+  "authors": {
+    "wangyang": "wangyang@wanmeizhensuo.com"
+  },
+  "source": {
+    "git": "https://github.com/<GITHUB_USERNAME>/GMRefresh.git",
+    "tag": "0.1.0"
+  },
+  "platforms": {
+    "ios": "8.0"
+  },
+  "dependencies": {
+    "MJRefresh": [
+      "~> 3.1.0"
+    ]
+  },
+  "source_files": "GMRefresh/Classes/**/*",
+  "resource_bundles": {
+    "GMRefresh": [
+      "GMRefresh/Assets/*.png"
+    ]
+  }
+}

Example/Pods/MJRefresh/LICENSE

+Copyright (c) 2013-2015 MJRefresh (https://github.com/CoderMJLee/MJRefresh)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshAutoFooter.h

+//
+//  MJRefreshAutoFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshFooter.h"
+
+@interface MJRefreshAutoFooter : MJRefreshFooter
+/** 是否自动刷新(默认为YES) */
+@property (assign, nonatomic, getter=isAutomaticallyRefresh) BOOL automaticallyRefresh;
+
+/** 当底部控件出现多少时就自动刷新(默认为1.0，也就是底部控件完全出现时，才会自动刷新) */
+@property (assign, nonatomic) CGFloat appearencePercentTriggerAutoRefresh MJRefreshDeprecated("请使用automaticallyChangeAlpha属性");
+
+/** 当底部控件出现多少时就自动刷新(默认为1.0，也就是底部控件完全出现时，才会自动刷新) */
+@property (assign, nonatomic) CGFloat triggerAutomaticallyRefreshPercent;
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshAutoFooter.m

+//
+//  MJRefreshAutoFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoFooter.h"
+
+@interface MJRefreshAutoFooter()
+@end
+
+@implementation MJRefreshAutoFooter
+
+#pragma mark - 初始化
+- (void)willMoveToSuperview:(UIView *)newSuperview
+{
+    [super willMoveToSuperview:newSuperview];
+    
+    if (newSuperview) { // 新的父控件
+        if (self.hidden == NO) {
+            self.scrollView.mj_insetB += self.mj_h;
+        }
+        
+        // 设置位置
+        self.mj_y = _scrollView.mj_contentH;
+    } else { // 被移除了
+        if (self.hidden == NO) {
+            self.scrollView.mj_insetB -= self.mj_h;
+        }
+    }
+}
+
+#pragma mark - 过期方法
+- (void)setAppearencePercentTriggerAutoRefresh:(CGFloat)appearencePercentTriggerAutoRefresh
+{
+    self.triggerAutomaticallyRefreshPercent = appearencePercentTriggerAutoRefresh;
+}
+
+- (CGFloat)appearencePercentTriggerAutoRefresh
+{
+    return self.triggerAutomaticallyRefreshPercent;
+}
+
+#pragma mark - 实现父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 默认底部控件100%出现时才会自动刷新
+    self.triggerAutomaticallyRefreshPercent = 1.0;
+    
+    // 设置为默认状态
+    self.automaticallyRefresh = YES;
+}
+
+- (void)scrollViewContentSizeDidChange:(NSDictionary *)change
+{
+    [super scrollViewContentSizeDidChange:change];
+    
+    // 设置位置
+    self.mj_y = self.scrollView.mj_contentH;
+}
+
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change
+{
+    [super scrollViewContentOffsetDidChange:change];
+    
+    if (self.state != MJRefreshStateIdle || !self.automaticallyRefresh || self.mj_y == 0) return;
+    
+    if (_scrollView.mj_insetT + _scrollView.mj_contentH > _scrollView.mj_h) { // 内容超过一个屏幕
+        // 这里的_scrollView.mj_contentH替换掉self.mj_y更为合理
+        if (_scrollView.mj_offsetY >= _scrollView.mj_contentH - _scrollView.mj_h + self.mj_h * self.triggerAutomaticallyRefreshPercent + _scrollView.mj_insetB - self.mj_h) {
+            // 防止手松开时连续调用
+            CGPoint old = [change[@"old"] CGPointValue];
+            CGPoint new = [change[@"new"] CGPointValue];
+            if (new.y <= old.y) return;
+            
+            // 当底部刷新控件完全出现时，才刷新
+            [self beginRefreshing];
+        }
+    }
+}
+
+- (void)scrollViewPanStateDidChange:(NSDictionary *)change
+{
+    [super scrollViewPanStateDidChange:change];
+    
+    if (self.state != MJRefreshStateIdle) return;
+    
+    if (_scrollView.panGestureRecognizer.state == UIGestureRecognizerStateEnded) {// 手松开
+        if (_scrollView.mj_insetT + _scrollView.mj_contentH <= _scrollView.mj_h) {  // 不够一个屏幕
+            if (_scrollView.mj_offsetY >= - _scrollView.mj_insetT) { // 向上拽
+                [self beginRefreshing];
+            }
+        } else { // 超出一个屏幕
+            if (_scrollView.mj_offsetY >= _scrollView.mj_contentH + _scrollView.mj_insetB - _scrollView.mj_h) {
+                [self beginRefreshing];
+            }
+        }
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    if (state == MJRefreshStateRefreshing) {
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            [self executeRefreshingCallback];
+        });
+    }
+}
+
+- (void)setHidden:(BOOL)hidden
+{
+    BOOL lastHidden = self.isHidden;
+    
+    [super setHidden:hidden];
+    
+    if (!lastHidden && hidden) {
+        self.state = MJRefreshStateIdle;
+        
+        self.scrollView.mj_insetB -= self.mj_h;
+    } else if (lastHidden && !hidden) {
+        self.scrollView.mj_insetB += self.mj_h;
+        
+        // 设置位置
+        self.mj_y = _scrollView.mj_contentH;
+    }
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshBackFooter.h

+//
+//  MJRefreshBackFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshFooter.h"
+
+@interface MJRefreshBackFooter : MJRefreshFooter
+
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshBackFooter.m

+//
+//  MJRefreshBackFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackFooter.h"
+
+@interface MJRefreshBackFooter()
+@property (assign, nonatomic) NSInteger lastRefreshCount;
+@property (assign, nonatomic) CGFloat lastBottomDelta;
+@end
+
+@implementation MJRefreshBackFooter
+
+#pragma mark - 初始化
+- (void)willMoveToSuperview:(UIView *)newSuperview
+{
+    [super willMoveToSuperview:newSuperview];
+    
+    [self scrollViewContentSizeDidChange:nil];
+}
+
+#pragma mark - 实现父类的方法
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change
+{
+    [super scrollViewContentOffsetDidChange:change];
+    
+    // 如果正在刷新，直接返回
+    if (self.state == MJRefreshStateRefreshing) return;
+    
+    _scrollViewOriginalInset = self.scrollView.contentInset;
+    
+    // 当前的contentOffset
+    CGFloat currentOffsetY = self.scrollView.mj_offsetY;
+    // 尾部控件刚好出现的offsetY
+    CGFloat happenOffsetY = [self happenOffsetY];
+    // 如果是向下滚动到看不见尾部控件，直接返回
+    if (currentOffsetY <= happenOffsetY) return;
+    
+    CGFloat pullingPercent = (currentOffsetY - happenOffsetY) / self.mj_h;
+    
+    // 如果已全部加载，仅设置pullingPercent，然后返回
+    if (self.state == MJRefreshStateNoMoreData) {
+        self.pullingPercent = pullingPercent;
+        return;
+    }
+    
+    if (self.scrollView.isDragging) {
+        self.pullingPercent = pullingPercent;
+        // 普通 和 即将刷新 的临界点
+        CGFloat normal2pullingOffsetY = happenOffsetY + self.mj_h;
+        
+        if (self.state == MJRefreshStateIdle && currentOffsetY > normal2pullingOffsetY) {
+            // 转为即将刷新状态
+            self.state = MJRefreshStatePulling;
+        } else if (self.state == MJRefreshStatePulling && currentOffsetY <= normal2pullingOffsetY) {
+            // 转为普通状态
+            self.state = MJRefreshStateIdle;
+        }
+    } else if (self.state == MJRefreshStatePulling) {// 即将刷新 && 手松开
+        // 开始刷新
+        [self beginRefreshing];
+    } else if (pullingPercent < 1) {
+        self.pullingPercent = pullingPercent;
+    }
+}
+
+- (void)scrollViewContentSizeDidChange:(NSDictionary *)change
+{
+    [super scrollViewContentSizeDidChange:change];
+    
+    // 内容的高度
+    CGFloat contentHeight = self.scrollView.mj_contentH + self.ignoredScrollViewContentInsetBottom;
+    // 表格的高度
+    CGFloat scrollHeight = self.scrollView.mj_h - self.scrollViewOriginalInset.top - self.scrollViewOriginalInset.bottom + self.ignoredScrollViewContentInsetBottom;
+    // 设置位置和尺寸
+    self.mj_y = MAX(contentHeight, scrollHeight);
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态来设置属性
+    if (state == MJRefreshStateNoMoreData || state == MJRefreshStateIdle) {
+        // 刷新完毕
+        if (MJRefreshStateRefreshing == oldState) {
+            [UIView animateWithDuration:MJRefreshSlowAnimationDuration animations:^{
+                self.scrollView.mj_insetB -= self.lastBottomDelta;
+                
+                // 自动调整透明度
+                if (self.isAutomaticallyChangeAlpha) self.alpha = 0.0;
+            } completion:^(BOOL finished) {
+                self.pullingPercent = 0.0;
+            }];
+        }
+        
+        CGFloat deltaH = [self heightForContentBreakView];
+        // 刚刷新完毕
+        if (MJRefreshStateRefreshing == oldState && deltaH > 0 && self.scrollView.mj_totalDataCount != self.lastRefreshCount) {
+            self.scrollView.mj_offsetY = self.scrollView.mj_offsetY;
+        }
+    } else if (state == MJRefreshStateRefreshing) {
+        // 记录刷新前的数量
+        self.lastRefreshCount = self.scrollView.mj_totalDataCount;
+        
+        [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+            CGFloat bottom = self.mj_h + self.scrollViewOriginalInset.bottom;
+            CGFloat deltaH = [self heightForContentBreakView];
+            if (deltaH < 0) { // 如果内容高度小于view的高度
+                bottom -= deltaH;
+            }
+            self.lastBottomDelta = bottom - self.scrollView.mj_insetB;
+            self.scrollView.mj_insetB = bottom;
+            self.scrollView.mj_offsetY = [self happenOffsetY] + self.mj_h;
+        } completion:^(BOOL finished) {
+            [self executeRefreshingCallback];
+        }];
+    }
+}
+
+#pragma mark - 公共方法
+- (void)endRefreshing
+{
+    if ([self.scrollView isKindOfClass:[UICollectionView class]]) {
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            [super endRefreshing];
+        });
+    } else {
+        [super endRefreshing];
+    }
+}
+
+- (void)noticeNoMoreData
+{
+    if ([self.scrollView isKindOfClass:[UICollectionView class]]) {
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            [super noticeNoMoreData];
+        });
+    } else {
+        [super noticeNoMoreData];
+    }
+}
+
+#pragma mark - 私有方法
+#pragma mark 获得scrollView的内容 超出 view 的高度
+- (CGFloat)heightForContentBreakView
+{
+    CGFloat h = self.scrollView.frame.size.height - self.scrollViewOriginalInset.bottom - self.scrollViewOriginalInset.top;
+    return self.scrollView.contentSize.height - h;
+}
+
+#pragma mark 刚好看到上拉刷新控件时的contentOffset.y
+- (CGFloat)happenOffsetY
+{
+    CGFloat deltaH = [self heightForContentBreakView];
+    if (deltaH > 0) {
+        return deltaH - self.scrollViewOriginalInset.top;
+    } else {
+        return - self.scrollViewOriginalInset.top;
+    }
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshComponent.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshComponent.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//  刷新控件的基类
+
+#import <UIKit/UIKit.h>
+#import "MJRefreshConst.h"
+#import "UIView+MJExtension.h"
+#import "UIScrollView+MJExtension.h"
+#import "UIScrollView+MJRefresh.h"
+
+/** 刷新控件的状态 */
+typedef NS_ENUM(NSInteger, MJRefreshState) {
+    /** 普通闲置状态 */
+    MJRefreshStateIdle = 1,
+    /** 松开就可以进行刷新的状态 */
+    MJRefreshStatePulling,
+    /** 正在刷新中的状态 */
+    MJRefreshStateRefreshing,
+    /** 即将刷新的状态 */
+    MJRefreshStateWillRefresh,
+    /** 所有数据加载完毕，没有更多的数据了 */
+    MJRefreshStateNoMoreData
+};
+
+/** 进入刷新状态的回调 */
+typedef void (^MJRefreshComponentRefreshingBlock)();
+
+/** 刷新控件的基类 */
+@interface MJRefreshComponent : UIView
+{
+    /** 记录scrollView刚开始的inset */
+    UIEdgeInsets _scrollViewOriginalInset;
+    /** 父控件 */
+    __weak UIScrollView *_scrollView;
+}
+#pragma mark - 刷新回调
+/** 正在刷新的回调 */
+@property (copy, nonatomic) MJRefreshComponentRefreshingBlock refreshingBlock;
+/** 设置回调对象和回调方法 */
+- (void)setRefreshingTarget:(id)target refreshingAction:(SEL)action;
+/** 回调对象 */
+@property (weak, nonatomic) id refreshingTarget;
+/** 回调方法 */
+@property (assign, nonatomic) SEL refreshingAction;
+/** 触发回调（交给子类去调用） */
+- (void)executeRefreshingCallback;
+
+#pragma mark - 刷新状态控制
+/** 进入刷新状态 */
+- (void)beginRefreshing;
+/** 结束刷新状态 */
+- (void)endRefreshing;
+/** 是否正在刷新 */
+- (BOOL)isRefreshing;
+/** 刷新状态 一般交给子类内部实现 */
+@property (assign, nonatomic) MJRefreshState state;
+
+#pragma mark - 交给子类去访问
+/** 记录scrollView刚开始的inset */
+@property (assign, nonatomic, readonly) UIEdgeInsets scrollViewOriginalInset;
+/** 父控件 */
+@property (weak, nonatomic, readonly) UIScrollView *scrollView;
+
+#pragma mark - 交给子类们去实现
+/** 初始化 */
+- (void)prepare NS_REQUIRES_SUPER;
+/** 摆放子控件frame */
+- (void)placeSubviews NS_REQUIRES_SUPER;
+/** 当scrollView的contentOffset发生改变的时候调用 */
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
+/** 当scrollView的contentSize发生改变的时候调用 */
+- (void)scrollViewContentSizeDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
+/** 当scrollView的拖拽状态发生改变的时候调用 */
+- (void)scrollViewPanStateDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
+
+
+#pragma mark - 其他
+/** 拉拽的百分比(交给子类重写) */
+@property (assign, nonatomic) CGFloat pullingPercent;
+/** 根据拖拽比例自动切换透明度 */
+@property (assign, nonatomic, getter=isAutoChangeAlpha) BOOL autoChangeAlpha MJRefreshDeprecated("请使用automaticallyChangeAlpha属性");
+/** 根据拖拽比例自动切换透明度 */
+@property (assign, nonatomic, getter=isAutomaticallyChangeAlpha) BOOL automaticallyChangeAlpha;
+@end
+
+@interface UILabel(MJRefresh)
++ (instancetype)label;
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshComponent.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshComponent.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshComponent.h"
+#import "MJRefreshConst.h"
+#import "UIView+MJExtension.h"
+#import "UIScrollView+MJRefresh.h"
+
+@interface MJRefreshComponent()
+@property (strong, nonatomic) UIPanGestureRecognizer *pan;
+@end
+
+@implementation MJRefreshComponent
+#pragma mark - 初始化
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    if (self = [super initWithFrame:frame]) {
+        // 准备工作
+        [self prepare];
+        
+        // 默认是普通状态
+        self.state = MJRefreshStateIdle;
+    }
+    return self;
+}
+
+- (void)prepare
+{
+    // 基本属性
+    self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
+    self.backgroundColor = [UIColor clearColor];
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    [self placeSubviews];
+}
+
+- (void)placeSubviews{}
+
+- (void)willMoveToSuperview:(UIView *)newSuperview
+{
+    [super willMoveToSuperview:newSuperview];
+    
+    // 如果不是UIScrollView，不做任何事情
+    if (newSuperview && ![newSuperview isKindOfClass:[UIScrollView class]]) return;
+    
+    // 旧的父控件移除监听
+    [self removeObservers];
+    
+    if (newSuperview) { // 新的父控件
+        // 设置宽度
+        self.mj_w = newSuperview.mj_w;
+        // 设置位置
+        self.mj_x = 0;
+        
+        // 记录UIScrollView
+        _scrollView = (UIScrollView *)newSuperview;
+        // 设置永远支持垂直弹簧效果
+        _scrollView.alwaysBounceVertical = YES;
+        // 记录UIScrollView最开始的contentInset
+        _scrollViewOriginalInset = _scrollView.contentInset;
+        
+        // 添加监听
+        [self addObservers];
+    }
+}
+
+- (void)drawRect:(CGRect)rect
+{
+    [super drawRect:rect];
+    
+    if (self.state == MJRefreshStateWillRefresh) {
+        // 预防view还没显示出来就调用了beginRefreshing
+        self.state = MJRefreshStateRefreshing;
+    }
+}
+
+#pragma mark - KVO监听
+- (void)addObservers
+{
+    NSKeyValueObservingOptions options = NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld;
+    [self.scrollView addObserver:self forKeyPath:MJRefreshKeyPathContentOffset options:options context:nil];
+    [self.scrollView addObserver:self forKeyPath:MJRefreshKeyPathContentSize options:options context:nil];
+    self.pan = self.scrollView.panGestureRecognizer;
+    [self.pan addObserver:self forKeyPath:MJRefreshKeyPathPanState options:options context:nil];
+}
+
+- (void)removeObservers
+{
+    [self.superview removeObserver:self forKeyPath:MJRefreshKeyPathContentOffset];
+    [self.superview removeObserver:self forKeyPath:MJRefreshKeyPathContentSize];;
+    [self.pan removeObserver:self forKeyPath:MJRefreshKeyPathPanState];
+    self.pan = nil;
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
+{
+    // 遇到这些情况就直接返回
+    if (!self.userInteractionEnabled) return;
+    
+    // 这个就算看不见也需要处理
+    if ([keyPath isEqualToString:MJRefreshKeyPathContentSize]) {
+        [self scrollViewContentSizeDidChange:change];
+    }
+    
+    // 看不见
+    if (self.hidden) return;
+    if ([keyPath isEqualToString:MJRefreshKeyPathContentOffset]) {
+        [self scrollViewContentOffsetDidChange:change];
+    } else if ([keyPath isEqualToString:MJRefreshKeyPathPanState]) {
+        [self scrollViewPanStateDidChange:change];
+    }
+}
+
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change{}
+- (void)scrollViewContentSizeDidChange:(NSDictionary *)change{}
+- (void)scrollViewPanStateDidChange:(NSDictionary *)change{}
+
+#pragma mark - 公共方法
+#pragma mark 设置回调对象和回调方法
+- (void)setRefreshingTarget:(id)target refreshingAction:(SEL)action
+{
+    self.refreshingTarget = target;
+    self.refreshingAction = action;
+}
+
+#pragma mark 进入刷新状态
+- (void)beginRefreshing
+{
+    [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+        self.alpha = 1.0;
+    }];
+    self.pullingPercent = 1.0;
+    // 只要正在刷新，就完全显示
+    if (self.window) {
+        self.state = MJRefreshStateRefreshing;
+    } else {
+        self.state = MJRefreshStateWillRefresh;
+        // 刷新(预防从另一个控制器回到这个控制器的情况，回来要重新刷新一下)
+        [self setNeedsDisplay];
+    }
+}
+
+#pragma mark 结束刷新状态
+- (void)endRefreshing
+{
+    self.state = MJRefreshStateIdle;
+}
+
+#pragma mark 是否正在刷新
+- (BOOL)isRefreshing
+{
+    return self.state == MJRefreshStateRefreshing || self.state == MJRefreshStateWillRefresh;
+}
+
+#pragma mark 自动切换透明度
+- (void)setAutoChangeAlpha:(BOOL)autoChangeAlpha
+{
+    self.automaticallyChangeAlpha = autoChangeAlpha;
+}
+
+- (BOOL)isAutoChangeAlpha
+{
+    return self.isAutomaticallyChangeAlpha;
+}
+
+- (void)setAutomaticallyChangeAlpha:(BOOL)automaticallyChangeAlpha
+{
+    _automaticallyChangeAlpha = automaticallyChangeAlpha;
+    
+    if (self.isRefreshing) return;
+    
+    if (automaticallyChangeAlpha) {
+        self.alpha = self.pullingPercent;
+    } else {
+        self.alpha = 1.0;
+    }
+}
+
+#pragma mark 根据拖拽进度设置透明度
+- (void)setPullingPercent:(CGFloat)pullingPercent
+{
+    _pullingPercent = pullingPercent;
+    
+    if (self.isRefreshing) return;
+    
+    if (self.isAutomaticallyChangeAlpha) {
+        self.alpha = pullingPercent;
+    }
+}
+
+#pragma mark - 内部方法
+- (void)executeRefreshingCallback
+{
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.refreshingBlock) {
+            self.refreshingBlock();
+        }
+        if ([self.refreshingTarget respondsToSelector:self.refreshingAction]) {
+            MJRefreshMsgSend(MJRefreshMsgTarget(self.refreshingTarget), self.refreshingAction, self);
+        }
+    });
+}
+@end
+
+@implementation UILabel(MJRefresh)
++ (instancetype)label
+{
+    UILabel *label = [[self alloc] init];
+    label.font = MJRefreshLabelFont;
+    label.textColor = MJRefreshLabelTextColor;
+    label.autoresizingMask = UIViewAutoresizingFlexibleWidth;
+    label.textAlignment = NSTextAlignmentCenter;
+    label.backgroundColor = [UIColor clearColor];
+    return label;
+}
+@end
\ No newline at end of file

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshFooter.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/5.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//  上拉刷新控件
+
+#import "MJRefreshComponent.h"
+
+@interface MJRefreshFooter : MJRefreshComponent
+/** 创建footer */
++ (instancetype)footerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock;
+/** 创建footer */
++ (instancetype)footerWithRefreshingTarget:(id)target refreshingAction:(SEL)action;
+
+/** 提示没有更多的数据 */
+- (void)endRefreshingWithNoMoreData;
+- (void)noticeNoMoreData MJRefreshDeprecated("使用endRefreshingWithNoMoreData");
+
+/** 重置没有更多的数据（消除没有更多数据的状态） */
+- (void)resetNoMoreData;
+
+/** 忽略多少scrollView的contentInset的bottom */
+@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetBottom;
+
+/** 自动根据有无数据来显示和隐藏（有数据就显示，没有数据隐藏。默认是NO） */
+@property (assign, nonatomic, getter=isAutomaticallyHidden) BOOL automaticallyHidden;
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshFooter.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/5.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshFooter.h"
+
+@interface MJRefreshFooter()
+
+@end
+
+@implementation MJRefreshFooter
+#pragma mark - 构造方法
++ (instancetype)footerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock
+{
+    MJRefreshFooter *cmp = [[self alloc] init];
+    cmp.refreshingBlock = refreshingBlock;
+    return cmp;
+}
++ (instancetype)footerWithRefreshingTarget:(id)target refreshingAction:(SEL)action
+{
+    MJRefreshFooter *cmp = [[self alloc] init];
+    [cmp setRefreshingTarget:target refreshingAction:action];
+    return cmp;
+}
+
+#pragma mark - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 设置自己的高度
+    self.mj_h = MJRefreshFooterHeight;
+    
+    // 默认不会自动隐藏
+    self.automaticallyHidden = NO;
+}
+
+- (void)willMoveToSuperview:(UIView *)newSuperview
+{
+    [super willMoveToSuperview:newSuperview];
+    
+    if (newSuperview) {
+        // 监听scrollView数据的变化
+        if ([self.scrollView isKindOfClass:[UITableView class]] || [self.scrollView isKindOfClass:[UICollectionView class]]) {
+            [self.scrollView setMj_reloadDataBlock:^(NSInteger totalDataCount) {
+                if (self.isAutomaticallyHidden) {
+                    self.hidden = (totalDataCount == 0);
+                }
+            }];
+        }
+    }
+}
+
+#pragma mark - 公共方法
+- (void)endRefreshingWithNoMoreData
+{
+    self.state = MJRefreshStateNoMoreData;
+}
+
+- (void)noticeNoMoreData
+{
+    [self endRefreshingWithNoMoreData];
+}
+
+- (void)resetNoMoreData
+{
+    self.state = MJRefreshStateIdle;
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshHeader.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshHeader.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//  下拉刷新控件:负责监控用户下拉的状态
+
+#import "MJRefreshComponent.h"
+
+@interface MJRefreshHeader : MJRefreshComponent
+/** 创建header */
++ (instancetype)headerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock;
+/** 创建header */
++ (instancetype)headerWithRefreshingTarget:(id)target refreshingAction:(SEL)action;
+
+/** 这个key用来存储上一次下拉刷新成功的时间 */
+@property (copy, nonatomic) NSString *lastUpdatedTimeKey;
+/** 上一次下拉刷新成功的时间 */
+@property (strong, nonatomic, readonly) NSDate *lastUpdatedTime;
+
+/** 忽略多少scrollView的contentInset的top */
+@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetTop;
+@end

Example/Pods/MJRefresh/MJRefresh/Base/MJRefreshHeader.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  MJRefreshHeader.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshHeader.h"
+
+@interface MJRefreshHeader()
+@property (assign, nonatomic) CGFloat insetTDelta;
+@end
+
+@implementation MJRefreshHeader
+#pragma mark - 构造方法
++ (instancetype)headerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock
+{
+    MJRefreshHeader *cmp = [[self alloc] init];
+    cmp.refreshingBlock = refreshingBlock;
+    return cmp;
+}
++ (instancetype)headerWithRefreshingTarget:(id)target refreshingAction:(SEL)action
+{
+    MJRefreshHeader *cmp = [[self alloc] init];
+    [cmp setRefreshingTarget:target refreshingAction:action];
+    return cmp;
+}
+
+#pragma mark - 覆盖父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 设置key
+    self.lastUpdatedTimeKey = MJRefreshHeaderLastUpdatedTimeKey;
+    
+    // 设置高度
+    self.mj_h = MJRefreshHeaderHeight;
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    // 设置y值(当自己的高度发生改变了，肯定要重新调整Y值，所以放到placeSubviews方法中设置y值)
+    self.mj_y = - self.mj_h - self.ignoredScrollViewContentInsetTop;
+}
+
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change
+{
+    [super scrollViewContentOffsetDidChange:change];
+    
+    // 在刷新的refreshing状态
+    if (self.state == MJRefreshStateRefreshing) {
+        if (self.window == nil) return;
+        
+        // sectionheader停留解决
+        CGFloat insetT = - self.scrollView.mj_offsetY > _scrollViewOriginalInset.top ? - self.scrollView.mj_offsetY : _scrollViewOriginalInset.top;
+        insetT = insetT > self.mj_h + _scrollViewOriginalInset.top ? self.mj_h + _scrollViewOriginalInset.top : insetT;
+        self.scrollView.mj_insetT = insetT;
+        
+        self.insetTDelta = _scrollViewOriginalInset.top - insetT;
+        return;
+    }
+    
+    // 跳转到下一个控制器时，contentInset可能会变
+     _scrollViewOriginalInset = self.scrollView.contentInset;
+    
+    // 当前的contentOffset
+    CGFloat offsetY = self.scrollView.mj_offsetY;
+    // 头部控件刚好出现的offsetY
+    CGFloat happenOffsetY = - self.scrollViewOriginalInset.top;
+    
+    // 如果是向上滚动到看不见头部控件，直接返回
+    // >= -> >
+    if (offsetY > happenOffsetY) return;
+    
+    // 普通 和 即将刷新 的临界点
+    CGFloat normal2pullingOffsetY = happenOffsetY - self.mj_h;
+    CGFloat pullingPercent = (happenOffsetY - offsetY) / self.mj_h;
+    
+    if (self.scrollView.isDragging) { // 如果正在拖拽
+        self.pullingPercent = pullingPercent;
+        if (self.state == MJRefreshStateIdle && offsetY < normal2pullingOffsetY) {
+            // 转为即将刷新状态
+            self.state = MJRefreshStatePulling;
+        } else if (self.state == MJRefreshStatePulling && offsetY >= normal2pullingOffsetY) {
+            // 转为普通状态
+            self.state = MJRefreshStateIdle;
+        }
+    } else if (self.state == MJRefreshStatePulling) {// 即将刷新 && 手松开
+        // 开始刷新
+        [self beginRefreshing];
+    } else if (pullingPercent < 1) {
+        self.pullingPercent = pullingPercent;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStateIdle) {
+        if (oldState != MJRefreshStateRefreshing) return;
+        
+        // 保存刷新时间
+        [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:self.lastUpdatedTimeKey];
+        [[NSUserDefaults standardUserDefaults] synchronize];
+        
+        // 恢复inset和offset
+        [UIView animateWithDuration:MJRefreshSlowAnimationDuration animations:^{
+            self.scrollView.mj_insetT += self.insetTDelta;
+            
+            // 自动调整透明度
+            if (self.isAutomaticallyChangeAlpha) self.alpha = 0.0;
+        } completion:^(BOOL finished) {
+            self.pullingPercent = 0.0;
+        }];
+    } else if (state == MJRefreshStateRefreshing) {
+        [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+            // 增加滚动区域
+            CGFloat top = self.scrollViewOriginalInset.top + self.mj_h;
+            self.scrollView.mj_insetT = top;
+            
+            // 设置滚动位置
+            self.scrollView.mj_offsetY = - top;
+        } completion:^(BOOL finished) {
+            [self executeRefreshingCallback];
+        }];
+    }
+}
+
+- (void)drawRect:(CGRect)rect
+{
+    [super drawRect:rect];
+    
+    
+}
+
+#pragma mark - 公共方法
+- (void)endRefreshing
+{
+    if ([self.scrollView isKindOfClass:[UICollectionView class]]) {
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+            [super endRefreshing];
+        });
+    } else {
+        [super endRefreshing];
+    }
+}
+
+- (NSDate *)lastUpdatedTime
+{
+    return [[NSUserDefaults standardUserDefaults] objectForKey:self.lastUpdatedTimeKey];
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoGifFooter.h

+//
+//  MJRefreshAutoGifFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoStateFooter.h"
+
+@interface MJRefreshAutoGifFooter : MJRefreshAutoStateFooter
+@property (weak, nonatomic, readonly) UIImageView *gifView;
+
+/** 设置state状态下的动画图片images 动画持续时间duration*/
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state;
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoGifFooter.m

+//
+//  MJRefreshAutoGifFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoGifFooter.h"
+
+@interface MJRefreshAutoGifFooter()
+{
+    __unsafe_unretained UIImageView *_gifView;
+}
+/** 所有状态对应的动画图片 */
+@property (strong, nonatomic) NSMutableDictionary *stateImages;
+/** 所有状态对应的动画时间 */
+@property (strong, nonatomic) NSMutableDictionary *stateDurations;
+@end
+
+@implementation MJRefreshAutoGifFooter
+#pragma mark - 懒加载
+- (UIImageView *)gifView
+{
+    if (!_gifView) {
+        UIImageView *gifView = [[UIImageView alloc] init];
+        [self addSubview:_gifView = gifView];
+    }
+    return _gifView;
+}
+
+- (NSMutableDictionary *)stateImages
+{
+    if (!_stateImages) {
+        self.stateImages = [NSMutableDictionary dictionary];
+    }
+    return _stateImages;
+}
+
+- (NSMutableDictionary *)stateDurations
+{
+    if (!_stateDurations) {
+        self.stateDurations = [NSMutableDictionary dictionary];
+    }
+    return _stateDurations;
+}
+
+#pragma mark - 公共方法
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state
+{
+    if (images == nil) return;
+    
+    self.stateImages[@(state)] = images;
+    self.stateDurations[@(state)] = @(duration);
+    
+    /* 根据图片设置控件的高度 */
+    UIImage *image = [images firstObject];
+    if (image.size.height > self.mj_h) {
+        self.mj_h = image.size.height;
+    }
+}
+
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state
+{
+    [self setImages:images duration:images.count * 0.1 forState:state];
+}
+
+#pragma mark - 实现父类的方法
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.gifView.constraints.count) return;
+    
+    self.gifView.frame = self.bounds;
+    if (self.isRefreshingTitleHidden) {
+        self.gifView.contentMode = UIViewContentModeCenter;
+    } else {
+        self.gifView.contentMode = UIViewContentModeRight;
+        self.gifView.mj_w = self.mj_w * 0.5 - 90;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStateRefreshing) {
+        NSArray *images = self.stateImages[@(state)];
+        if (images.count == 0) return;
+        [self.gifView stopAnimating];
+        
+        self.gifView.hidden = NO;
+        if (images.count == 1) { // 单张图片
+            self.gifView.image = [images lastObject];
+        } else { // 多张图片
+            self.gifView.animationImages = images;
+            self.gifView.animationDuration = [self.stateDurations[@(state)] doubleValue];
+            [self.gifView startAnimating];
+        }
+    } else if (state == MJRefreshStateNoMoreData || state == MJRefreshStateIdle) {
+        [self.gifView stopAnimating];
+        self.gifView.hidden = YES;
+    }
+}
+@end
+

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoNormalFooter.h

+//
+//  MJRefreshAutoNormalFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoStateFooter.h"
+
+@interface MJRefreshAutoNormalFooter : MJRefreshAutoStateFooter
+/** 菊花的样式 */
+@property (assign, nonatomic) UIActivityIndicatorViewStyle activityIndicatorViewStyle;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoNormalFooter.m

+//
+//  MJRefreshAutoNormalFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoNormalFooter.h"
+
+@interface MJRefreshAutoNormalFooter()
+@property (weak, nonatomic) UIActivityIndicatorView *loadingView;
+@end
+
+@implementation MJRefreshAutoNormalFooter
+#pragma mark - 懒加载子控件
+- (UIActivityIndicatorView *)loadingView
+{
+    if (!_loadingView) {
+        UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:self.activityIndicatorViewStyle];
+        loadingView.hidesWhenStopped = YES;
+        [self addSubview:_loadingView = loadingView];
+    }
+    return _loadingView;
+}
+
+- (void)setActivityIndicatorViewStyle:(UIActivityIndicatorViewStyle)activityIndicatorViewStyle
+{
+    _activityIndicatorViewStyle = activityIndicatorViewStyle;
+    
+    self.loadingView = nil;
+    [self setNeedsLayout];
+}
+#pragma makr - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    self.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.loadingView.constraints.count) return;
+    
+    // 圈圈
+    CGFloat loadingCenterX = self.mj_w * 0.5;
+    if (!self.isRefreshingTitleHidden) {
+        loadingCenterX -= 100;
+    }
+    CGFloat loadingCenterY = self.mj_h * 0.5;
+    self.loadingView.center = CGPointMake(loadingCenterX, loadingCenterY);
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStateNoMoreData || state == MJRefreshStateIdle) {
+        [self.loadingView stopAnimating];
+    } else if (state == MJRefreshStateRefreshing) {
+        [self.loadingView startAnimating];
+    }
+}
+
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoStateFooter.h

+//
+//  MJRefreshAutoStateFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/6/13.
+//  Copyright © 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoFooter.h"
+
+@interface MJRefreshAutoStateFooter : MJRefreshAutoFooter
+/** 显示刷新状态的label */
+@property (weak, nonatomic, readonly) UILabel *stateLabel;
+
+/** 设置state状态下的文字 */
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state;
+
+/** 隐藏刷新状态的文字 */
+@property (assign, nonatomic, getter=isRefreshingTitleHidden) BOOL refreshingTitleHidden;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Auto/MJRefreshAutoStateFooter.m

+//
+//  MJRefreshAutoStateFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/6/13.
+//  Copyright © 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshAutoStateFooter.h"
+
+@interface MJRefreshAutoStateFooter()
+{
+    /** 显示刷新状态的label */
+    __unsafe_unretained UILabel *_stateLabel;
+}
+/** 所有状态对应的文字 */
+@property (strong, nonatomic) NSMutableDictionary *stateTitles;
+@end
+
+@implementation MJRefreshAutoStateFooter
+#pragma mark - 懒加载
+- (NSMutableDictionary *)stateTitles
+{
+    if (!_stateTitles) {
+        self.stateTitles = [NSMutableDictionary dictionary];
+    }
+    return _stateTitles;
+}
+
+- (UILabel *)stateLabel
+{
+    if (!_stateLabel) {
+        [self addSubview:_stateLabel = [UILabel label]];
+    }
+    return _stateLabel;
+}
+
+#pragma mark - 公共方法
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state
+{
+    if (title == nil) return;
+    self.stateTitles[@(state)] = title;
+    self.stateLabel.text = self.stateTitles[@(self.state)];
+}
+
+#pragma mark - 私有方法
+- (void)stateLabelClick
+{
+    if (self.state == MJRefreshStateIdle) {
+        [self beginRefreshing];
+    }
+}
+
+#pragma mark - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 初始化文字
+    [self setTitle:MJRefreshAutoFooterIdleText forState:MJRefreshStateIdle];
+    [self setTitle:MJRefreshAutoFooterRefreshingText forState:MJRefreshStateRefreshing];
+    [self setTitle:MJRefreshAutoFooterNoMoreDataText forState:MJRefreshStateNoMoreData];
+    
+    // 监听label
+    self.stateLabel.userInteractionEnabled = YES;
+    [self.stateLabel addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(stateLabelClick)]];
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.stateLabel.constraints.count) return;
+    
+    // 状态标签
+    self.stateLabel.frame = self.bounds;
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    if (self.isRefreshingTitleHidden && state == MJRefreshStateRefreshing) {
+        self.stateLabel.text = nil;
+    } else {
+        self.stateLabel.text = self.stateTitles[@(state)];
+    }
+}
+@end
\ No newline at end of file

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackGifFooter.h

+//
+//  MJRefreshBackGifFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackStateFooter.h"
+
+@interface MJRefreshBackGifFooter : MJRefreshBackStateFooter
+@property (weak, nonatomic, readonly) UIImageView *gifView;
+
+/** 设置state状态下的动画图片images 动画持续时间duration*/
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state;
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackGifFooter.m

+//
+//  MJRefreshBackGifFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackGifFooter.h"
+
+@interface MJRefreshBackGifFooter()
+{
+    __unsafe_unretained UIImageView *_gifView;
+}
+/** 所有状态对应的动画图片 */
+@property (strong, nonatomic) NSMutableDictionary *stateImages;
+/** 所有状态对应的动画时间 */
+@property (strong, nonatomic) NSMutableDictionary *stateDurations;
+@end
+
+@implementation MJRefreshBackGifFooter
+#pragma mark - 懒加载
+- (UIImageView *)gifView
+{
+    if (!_gifView) {
+        UIImageView *gifView = [[UIImageView alloc] init];
+        [self addSubview:_gifView = gifView];
+    }
+    return _gifView;
+}
+
+- (NSMutableDictionary *)stateImages
+{
+    if (!_stateImages) {
+        self.stateImages = [NSMutableDictionary dictionary];
+    }
+    return _stateImages;
+}
+
+- (NSMutableDictionary *)stateDurations
+{
+    if (!_stateDurations) {
+        self.stateDurations = [NSMutableDictionary dictionary];
+    }
+    return _stateDurations;
+}
+
+#pragma mark - 公共方法
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state
+{
+    if (images == nil) return;
+    
+    self.stateImages[@(state)] = images;
+    self.stateDurations[@(state)] = @(duration);
+    
+    /* 根据图片设置控件的高度 */
+    UIImage *image = [images firstObject];
+    if (image.size.height > self.mj_h) {
+        self.mj_h = image.size.height;
+    }
+}
+
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state
+{
+    [self setImages:images duration:images.count * 0.1 forState:state];
+}
+
+#pragma mark - 实现父类的方法
+- (void)setPullingPercent:(CGFloat)pullingPercent
+{
+    [super setPullingPercent:pullingPercent];
+    NSArray *images = self.stateImages[@(MJRefreshStateIdle)];
+    if (self.state != MJRefreshStateIdle || images.count == 0) return;
+    [self.gifView stopAnimating];
+    NSUInteger index =  images.count * pullingPercent;
+    if (index >= images.count) index = images.count - 1;
+    self.gifView.image = images[index];
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.gifView.constraints.count) return;
+    
+    self.gifView.frame = self.bounds;
+    if (self.stateLabel.hidden) {
+        self.gifView.contentMode = UIViewContentModeCenter;
+    } else {
+        self.gifView.contentMode = UIViewContentModeRight;
+        self.gifView.mj_w = self.mj_w * 0.5 - 90;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStatePulling || state == MJRefreshStateRefreshing) {
+        NSArray *images = self.stateImages[@(state)];
+        if (images.count == 0) return;
+        
+        self.gifView.hidden = NO;
+        [self.gifView stopAnimating];
+        if (images.count == 1) { // 单张图片
+            self.gifView.image = [images lastObject];
+        } else { // 多张图片
+            self.gifView.animationImages = images;
+            self.gifView.animationDuration = [self.stateDurations[@(state)] doubleValue];
+            [self.gifView startAnimating];
+        }
+    } else if (state == MJRefreshStateIdle) {
+        self.gifView.hidden = NO;
+    } else if (state == MJRefreshStateNoMoreData) {
+        self.gifView.hidden = YES;
+    }
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackNormalFooter.h

+//
+//  MJRefreshBackNormalFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackStateFooter.h"
+
+@interface MJRefreshBackNormalFooter : MJRefreshBackStateFooter
+@property (weak, nonatomic, readonly) UIImageView *arrowView;
+/** 菊花的样式 */
+@property (assign, nonatomic) UIActivityIndicatorViewStyle activityIndicatorViewStyle;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackNormalFooter.m

+//
+//  MJRefreshBackNormalFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackNormalFooter.h"
+
+@interface MJRefreshBackNormalFooter()
+{
+    __unsafe_unretained UIImageView *_arrowView;
+}
+@property (weak, nonatomic) UIActivityIndicatorView *loadingView;
+@end
+
+@implementation MJRefreshBackNormalFooter
+#pragma mark - 懒加载子控件
+- (UIImageView *)arrowView
+{
+    if (!_arrowView) {
+        UIImage *image = [UIImage imageNamed:MJRefreshSrcName(@"arrow.png")] ?: [UIImage imageNamed:MJRefreshFrameworkSrcName(@"arrow.png")];
+        UIImageView *arrowView = [[UIImageView alloc] initWithImage:image];
+        [self addSubview:_arrowView = arrowView];
+    }
+    return _arrowView;
+}
+
+
+- (UIActivityIndicatorView *)loadingView
+{
+    if (!_loadingView) {
+        UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:self.activityIndicatorViewStyle];
+        loadingView.hidesWhenStopped = YES;
+        [self addSubview:_loadingView = loadingView];
+    }
+    return _loadingView;
+}
+
+- (void)setActivityIndicatorViewStyle:(UIActivityIndicatorViewStyle)activityIndicatorViewStyle
+{
+    _activityIndicatorViewStyle = activityIndicatorViewStyle;
+    
+    self.loadingView = nil;
+    [self setNeedsLayout];
+}
+#pragma makr - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    self.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    // 箭头的中心点
+    CGFloat arrowCenterX = self.mj_w * 0.5;
+    if (!self.stateLabel.hidden) {
+        arrowCenterX -= 100;
+    }
+    CGFloat arrowCenterY = self.mj_h * 0.5;
+    CGPoint arrowCenter = CGPointMake(arrowCenterX, arrowCenterY);
+    
+    // 箭头
+    if (self.arrowView.constraints.count == 0) {
+        self.arrowView.mj_size = self.arrowView.image.size;
+        self.arrowView.center = arrowCenter;
+    }
+    
+    // 圈圈
+    if (self.loadingView.constraints.count == 0) {
+        self.loadingView.center = arrowCenter;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStateIdle) {
+        if (oldState == MJRefreshStateRefreshing) {
+            self.arrowView.transform = CGAffineTransformMakeRotation(0.000001 - M_PI);
+            [UIView animateWithDuration:MJRefreshSlowAnimationDuration animations:^{
+                self.loadingView.alpha = 0.0;
+            } completion:^(BOOL finished) {
+                self.loadingView.alpha = 1.0;
+                [self.loadingView stopAnimating];
+                
+                self.arrowView.hidden = NO;
+            }];
+        } else {
+            self.arrowView.hidden = NO;
+            [self.loadingView stopAnimating];
+            [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+                self.arrowView.transform = CGAffineTransformMakeRotation(0.000001 - M_PI);
+            }];
+        }
+    } else if (state == MJRefreshStatePulling) {
+        self.arrowView.hidden = NO;
+        [self.loadingView stopAnimating];
+        [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+            self.arrowView.transform = CGAffineTransformIdentity;
+        }];
+    } else if (state == MJRefreshStateRefreshing) {
+        self.arrowView.hidden = YES;
+        [self.loadingView startAnimating];
+    } else if (state == MJRefreshStateNoMoreData) {
+        self.arrowView.hidden = YES;
+        [self.loadingView stopAnimating];
+    }
+}
+
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackStateFooter.h

+//
+//  MJRefreshBackStateFooter.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/6/13.
+//  Copyright © 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackFooter.h"
+
+@interface MJRefreshBackStateFooter : MJRefreshBackFooter
+/** 显示刷新状态的label */
+@property (weak, nonatomic, readonly) UILabel *stateLabel;
+/** 设置state状态下的文字 */
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state;
+
+/** 获取state状态下的title */
+- (NSString *)titleForState:(MJRefreshState)state;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Footer/Back/MJRefreshBackStateFooter.m

+//
+//  MJRefreshBackStateFooter.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/6/13.
+//  Copyright © 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshBackStateFooter.h"
+
+@interface MJRefreshBackStateFooter()
+{
+    /** 显示刷新状态的label */
+    __unsafe_unretained UILabel *_stateLabel;
+}
+/** 所有状态对应的文字 */
+@property (strong, nonatomic) NSMutableDictionary *stateTitles;
+@end
+
+@implementation MJRefreshBackStateFooter
+#pragma mark - 懒加载
+- (NSMutableDictionary *)stateTitles
+{
+    if (!_stateTitles) {
+        self.stateTitles = [NSMutableDictionary dictionary];
+    }
+    return _stateTitles;
+}
+
+- (UILabel *)stateLabel
+{
+    if (!_stateLabel) {
+        [self addSubview:_stateLabel = [UILabel label]];
+    }
+    return _stateLabel;
+}
+
+#pragma mark - 公共方法
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state
+{
+    if (title == nil) return;
+    self.stateTitles[@(state)] = title;
+    self.stateLabel.text = self.stateTitles[@(self.state)];
+}
+
+- (NSString *)titleForState:(MJRefreshState)state {
+  return self.stateTitles[@(state)];
+}
+
+#pragma mark - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 初始化文字
+    [self setTitle:MJRefreshBackFooterIdleText forState:MJRefreshStateIdle];
+    [self setTitle:MJRefreshBackFooterPullingText forState:MJRefreshStatePulling];
+    [self setTitle:MJRefreshBackFooterRefreshingText forState:MJRefreshStateRefreshing];
+    [self setTitle:MJRefreshBackFooterNoMoreDataText forState:MJRefreshStateNoMoreData];
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.stateLabel.constraints.count) return;
+    
+    // 状态标签
+    self.stateLabel.frame = self.bounds;
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 设置状态文字
+    self.stateLabel.text = self.stateTitles[@(state)];
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshGifHeader.h

+//
+//  MJRefreshGifHeader.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshStateHeader.h"
+
+@interface MJRefreshGifHeader : MJRefreshStateHeader
+@property (weak, nonatomic, readonly) UIImageView *gifView;
+
+/** 设置state状态下的动画图片images 动画持续时间duration*/
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state;
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshGifHeader.m

+//
+//  MJRefreshGifHeader.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshGifHeader.h"
+
+@interface MJRefreshGifHeader()
+{
+    __unsafe_unretained UIImageView *_gifView;
+}
+/** 所有状态对应的动画图片 */
+@property (strong, nonatomic) NSMutableDictionary *stateImages;
+/** 所有状态对应的动画时间 */
+@property (strong, nonatomic) NSMutableDictionary *stateDurations;
+@end
+
+@implementation MJRefreshGifHeader
+#pragma mark - 懒加载
+- (UIImageView *)gifView
+{
+    if (!_gifView) { 
+        UIImageView *gifView = [[UIImageView alloc] init]; 
+        [self addSubview:_gifView = gifView]; 
+    } 
+    return _gifView; 
+}
+
+- (NSMutableDictionary *)stateImages 
+{ 
+    if (!_stateImages) { 
+        self.stateImages = [NSMutableDictionary dictionary]; 
+    } 
+    return _stateImages; 
+}
+
+- (NSMutableDictionary *)stateDurations 
+{ 
+    if (!_stateDurations) { 
+        self.stateDurations = [NSMutableDictionary dictionary]; 
+    } 
+    return _stateDurations; 
+}
+
+#pragma mark - 公共方法
+- (void)setImages:(NSArray *)images duration:(NSTimeInterval)duration forState:(MJRefreshState)state 
+{ 
+    if (images == nil) return; 
+    
+    self.stateImages[@(state)] = images; 
+    self.stateDurations[@(state)] = @(duration); 
+    
+    /* 根据图片设置控件的高度 */ 
+    UIImage *image = [images firstObject]; 
+    if (image.size.height > self.mj_h) { 
+        self.mj_h = image.size.height; 
+    } 
+}
+
+- (void)setImages:(NSArray *)images forState:(MJRefreshState)state 
+{ 
+    [self setImages:images duration:images.count * 0.1 forState:state]; 
+}
+
+#pragma mark - 实现父类的方法
+- (void)setPullingPercent:(CGFloat)pullingPercent
+{
+    [super setPullingPercent:pullingPercent];
+    NSArray *images = self.stateImages[@(MJRefreshStateIdle)];
+    if (self.state != MJRefreshStateIdle || images.count == 0) return;
+    // 停止动画
+    [self.gifView stopAnimating];
+    // 设置当前需要显示的图片
+    NSUInteger index =  images.count * pullingPercent;
+    if (index >= images.count) index = images.count - 1;
+    self.gifView.image = images[index];
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.gifView.constraints.count) return;
+    
+    self.gifView.frame = self.bounds;
+    if (self.stateLabel.hidden && self.lastUpdatedTimeLabel.hidden) {
+        self.gifView.contentMode = UIViewContentModeCenter;
+    } else {
+        self.gifView.contentMode = UIViewContentModeRight;
+        self.gifView.mj_w = self.mj_w * 0.5 - 90;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStatePulling || state == MJRefreshStateRefreshing) {
+        NSArray *images = self.stateImages[@(state)];
+        if (images.count == 0) return;
+        
+        [self.gifView stopAnimating];
+        if (images.count == 1) { // 单张图片
+            self.gifView.image = [images lastObject];
+        } else { // 多张图片
+            self.gifView.animationImages = images;
+            self.gifView.animationDuration = [self.stateDurations[@(state)] doubleValue];
+            [self.gifView startAnimating];
+        }
+    } else if (state == MJRefreshStateIdle) {
+        [self.gifView stopAnimating];
+    }
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshNormalHeader.h

+//
+//  MJRefreshNormalHeader.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshStateHeader.h"
+
+@interface MJRefreshNormalHeader : MJRefreshStateHeader
+@property (weak, nonatomic, readonly) UIImageView *arrowView;
+/** 菊花的样式 */
+@property (assign, nonatomic) UIActivityIndicatorViewStyle activityIndicatorViewStyle;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshNormalHeader.m

+//
+//  MJRefreshNormalHeader.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshNormalHeader.h"
+
+@interface MJRefreshNormalHeader()
+{
+    __unsafe_unretained UIImageView *_arrowView;
+}
+@property (weak, nonatomic) UIActivityIndicatorView *loadingView;
+@end
+
+@implementation MJRefreshNormalHeader
+#pragma mark - 懒加载子控件
+- (UIImageView *)arrowView
+{
+    if (!_arrowView) {
+        UIImage *image = [UIImage imageNamed:MJRefreshSrcName(@"arrow.png")] ?: [UIImage imageNamed:MJRefreshFrameworkSrcName(@"arrow.png")];
+        UIImageView *arrowView = [[UIImageView alloc] initWithImage:image];
+        [self addSubview:_arrowView = arrowView];
+    }
+    return _arrowView;
+}
+
+- (UIActivityIndicatorView *)loadingView
+{
+    if (!_loadingView) {
+        UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:self.activityIndicatorViewStyle];
+        loadingView.hidesWhenStopped = YES;
+        [self addSubview:_loadingView = loadingView];
+    }
+    return _loadingView;
+}
+
+#pragma mark - 公共方法
+- (void)setActivityIndicatorViewStyle:(UIActivityIndicatorViewStyle)activityIndicatorViewStyle
+{
+    _activityIndicatorViewStyle = activityIndicatorViewStyle;
+    
+    self.loadingView = nil;
+    [self setNeedsLayout];
+}
+
+#pragma makr - 重写父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    self.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    // 箭头的中心点
+    CGFloat arrowCenterX = self.mj_w * 0.5;
+    if (!self.stateLabel.hidden) {
+        arrowCenterX -= 100;
+    }
+    CGFloat arrowCenterY = self.mj_h * 0.5;
+    CGPoint arrowCenter = CGPointMake(arrowCenterX, arrowCenterY);
+    
+    // 箭头
+    if (self.arrowView.constraints.count == 0) {
+        self.arrowView.mj_size = self.arrowView.image.size;
+        self.arrowView.center = arrowCenter;
+    }
+        
+    // 圈圈
+    if (self.loadingView.constraints.count == 0) {
+        self.loadingView.center = arrowCenter;
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 根据状态做事情
+    if (state == MJRefreshStateIdle) {
+        if (oldState == MJRefreshStateRefreshing) {
+            self.arrowView.transform = CGAffineTransformIdentity;
+            
+            [UIView animateWithDuration:MJRefreshSlowAnimationDuration animations:^{
+                self.loadingView.alpha = 0.0;
+            } completion:^(BOOL finished) {
+                // 如果执行完动画发现不是idle状态，就直接返回，进入其他状态
+                if (self.state != MJRefreshStateIdle) return;
+                
+                self.loadingView.alpha = 1.0;
+                [self.loadingView stopAnimating];
+                self.arrowView.hidden = NO;
+            }];
+        } else {
+            [self.loadingView stopAnimating];
+            self.arrowView.hidden = NO;
+            [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+                self.arrowView.transform = CGAffineTransformIdentity;
+            }];
+        }
+    } else if (state == MJRefreshStatePulling) {
+        [self.loadingView stopAnimating];
+        self.arrowView.hidden = NO;
+        [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+            self.arrowView.transform = CGAffineTransformMakeRotation(0.000001 - M_PI);
+        }];
+    } else if (state == MJRefreshStateRefreshing) {
+        self.loadingView.alpha = 1.0; // 防止refreshing -> idle的动画完毕动作没有被执行
+        [self.loadingView startAnimating];
+        self.arrowView.hidden = YES;
+    }
+}
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshStateHeader.h

+//
+//  MJRefreshStateHeader.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshHeader.h"
+
+@interface MJRefreshStateHeader : MJRefreshHeader
+#pragma mark - 刷新时间相关
+/** 利用这个block来决定显示的更新时间文字 */
+@property (copy, nonatomic) NSString *(^lastUpdatedTimeText)(NSDate *lastUpdatedTime);
+/** 显示上一次刷新时间的label */
+@property (weak, nonatomic, readonly) UILabel *lastUpdatedTimeLabel;
+
+#pragma mark - 状态相关
+/** 显示刷新状态的label */
+@property (weak, nonatomic, readonly) UILabel *stateLabel;
+/** 设置state状态下的文字 */
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state;
+@end

Example/Pods/MJRefresh/MJRefresh/Custom/Header/MJRefreshStateHeader.m

+//
+//  MJRefreshStateHeader.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/4/24.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "MJRefreshStateHeader.h"
+
+@interface MJRefreshStateHeader()
+{
+    /** 显示上一次刷新时间的label */
+    __unsafe_unretained UILabel *_lastUpdatedTimeLabel;
+    /** 显示刷新状态的label */
+    __unsafe_unretained UILabel *_stateLabel;
+}
+/** 所有状态对应的文字 */
+@property (strong, nonatomic) NSMutableDictionary *stateTitles;
+@end
+
+@implementation MJRefreshStateHeader
+#pragma mark - 懒加载
+- (NSMutableDictionary *)stateTitles
+{
+    if (!_stateTitles) {
+        self.stateTitles = [NSMutableDictionary dictionary];
+    }
+    return _stateTitles;
+}
+
+- (UILabel *)stateLabel
+{
+    if (!_stateLabel) {
+        [self addSubview:_stateLabel = [UILabel label]];
+    }
+    return _stateLabel;
+}
+
+- (UILabel *)lastUpdatedTimeLabel
+{
+    if (!_lastUpdatedTimeLabel) {
+        [self addSubview:_lastUpdatedTimeLabel = [UILabel label]];
+    }
+    return _lastUpdatedTimeLabel;
+}
+
+#pragma mark - 公共方法
+- (void)setTitle:(NSString *)title forState:(MJRefreshState)state
+{
+    if (title == nil) return;
+    self.stateTitles[@(state)] = title;
+    self.stateLabel.text = self.stateTitles[@(self.state)];
+}
+
+#pragma mark - 日历获取在9.x之后的系统使用currentCalendar会出异常。在8.0之后使用系统新API。
+- (NSCalendar *)currentCalendar {
+    if ([NSCalendar respondsToSelector:@selector(calendarWithIdentifier:)]) {
+        return [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
+    }
+    return [NSCalendar currentCalendar];
+}
+
+#pragma mark key的处理
+- (void)setLastUpdatedTimeKey:(NSString *)lastUpdatedTimeKey
+{
+    [super setLastUpdatedTimeKey:lastUpdatedTimeKey];
+    
+    // 如果label隐藏了，就不用再处理
+    if (self.lastUpdatedTimeLabel.hidden) return;
+    
+    NSDate *lastUpdatedTime = [[NSUserDefaults standardUserDefaults] objectForKey:lastUpdatedTimeKey];
+    
+    // 如果有block
+    if (self.lastUpdatedTimeText) {
+        self.lastUpdatedTimeLabel.text = self.lastUpdatedTimeText(lastUpdatedTime);
+        return;
+    }
+    
+    if (lastUpdatedTime) {
+        // 1.获得年月日
+        NSCalendar *calendar = [self currentCalendar];
+        NSUInteger unitFlags = NSCalendarUnitYear| NSCalendarUnitMonth | NSCalendarUnitDay |NSCalendarUnitHour |NSCalendarUnitMinute;
+        NSDateComponents *cmp1 = [calendar components:unitFlags fromDate:lastUpdatedTime];
+        NSDateComponents *cmp2 = [calendar components:unitFlags fromDate:[NSDate date]];
+        
+        // 2.格式化日期
+        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+        if ([cmp1 day] == [cmp2 day]) { // 今天
+            formatter.dateFormat = @"今天 HH:mm";
+        } else if ([cmp1 year] == [cmp2 year]) { // 今年
+            formatter.dateFormat = @"MM-dd HH:mm";
+        } else {
+            formatter.dateFormat = @"yyyy-MM-dd HH:mm";
+        }
+        NSString *time = [formatter stringFromDate:lastUpdatedTime];
+        
+        // 3.显示日期
+        self.lastUpdatedTimeLabel.text = [NSString stringWithFormat:@"最后更新：%@", time];
+    } else {
+        self.lastUpdatedTimeLabel.text = @"最后更新：无记录";
+    }
+}
+
+#pragma mark - 覆盖父类的方法
+- (void)prepare
+{
+    [super prepare];
+    
+    // 初始化文字
+    [self setTitle:MJRefreshHeaderIdleText forState:MJRefreshStateIdle];
+    [self setTitle:MJRefreshHeaderPullingText forState:MJRefreshStatePulling];
+    [self setTitle:MJRefreshHeaderRefreshingText forState:MJRefreshStateRefreshing];
+}
+
+- (void)placeSubviews
+{
+    [super placeSubviews];
+    
+    if (self.stateLabel.hidden) return;
+    
+    BOOL noConstrainsOnStatusLabel = self.stateLabel.constraints.count == 0;
+    
+    if (self.lastUpdatedTimeLabel.hidden) {
+        // 状态
+        if (noConstrainsOnStatusLabel) self.stateLabel.frame = self.bounds;
+    } else {
+        CGFloat stateLabelH = self.mj_h * 0.5;
+        // 状态
+        if (noConstrainsOnStatusLabel) {
+            self.stateLabel.mj_x = 0;
+            self.stateLabel.mj_y = 0;
+            self.stateLabel.mj_w = self.mj_w;
+            self.stateLabel.mj_h = stateLabelH;
+        }
+        
+        // 更新时间
+        if (self.lastUpdatedTimeLabel.constraints.count == 0) {
+            self.lastUpdatedTimeLabel.mj_x = 0;
+            self.lastUpdatedTimeLabel.mj_y = stateLabelH;
+            self.lastUpdatedTimeLabel.mj_w = self.mj_w;
+            self.lastUpdatedTimeLabel.mj_h = self.mj_h - self.lastUpdatedTimeLabel.mj_y;
+        }
+    }
+}
+
+- (void)setState:(MJRefreshState)state
+{
+    MJRefreshCheckState
+    
+    // 设置状态文字
+    self.stateLabel.text = self.stateTitles[@(state)];
+    
+    // 重新设置key（重新显示时间）
+    self.lastUpdatedTimeKey = self.lastUpdatedTimeKey;
+}
+@end

Example/Pods/MJRefresh/MJRefresh/MJRefresh.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+
+#import "UIScrollView+MJRefresh.h"
+#import "UIScrollView+MJExtension.h"
+#import "UIView+MJExtension.h"
+
+#import "MJRefreshNormalHeader.h"
+#import "MJRefreshGifHeader.h"
+
+#import "MJRefreshBackNormalFooter.h"
+#import "MJRefreshBackGifFooter.h"
+#import "MJRefreshAutoNormalFooter.h"
+#import "MJRefreshAutoGifFooter.h"
\ No newline at end of file

Example/Pods/MJRefresh/MJRefresh/MJRefreshConst.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+#import <UIKit/UIKit.h>
+#import <objc/message.h>
+
+// 弱引用
+#define MJWeakSelf __weak typeof(self) weakSelf = self;
+
+// 日志输出
+#ifdef DEBUG
+#define MJRefreshLog(...) NSLog(__VA_ARGS__)
+#else
+#define MJRefreshLog(...)
+#endif
+
+// 过期提醒
+#define MJRefreshDeprecated(instead) NS_DEPRECATED(2_0, 2_0, 2_0, 2_0, instead)
+
+// 运行时objc_msgSend
+#define MJRefreshMsgSend(...) ((void (*)(void *, SEL, UIView *))objc_msgSend)(__VA_ARGS__)
+#define MJRefreshMsgTarget(target) (__bridge void *)(target)
+
+// RGB颜色
+#define MJRefreshColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
+
+// 文字颜色
+#define MJRefreshLabelTextColor MJRefreshColor(90, 90, 90)
+
+// 字体大小
+#define MJRefreshLabelFont [UIFont boldSystemFontOfSize:14]
+
+// 图片路径
+#define MJRefreshSrcName(file) [@"MJRefresh.bundle" stringByAppendingPathComponent:file]
+#define MJRefreshFrameworkSrcName(file) [@"Frameworks/MJRefresh.framework/MJRefresh.bundle" stringByAppendingPathComponent:file]
+
+// 常量
+UIKIT_EXTERN const CGFloat MJRefreshHeaderHeight;
+UIKIT_EXTERN const CGFloat MJRefreshFooterHeight;
+UIKIT_EXTERN const CGFloat MJRefreshFastAnimationDuration;
+UIKIT_EXTERN const CGFloat MJRefreshSlowAnimationDuration;
+
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentOffset;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentSize;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentInset;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathPanState;
+
+UIKIT_EXTERN NSString *const MJRefreshHeaderLastUpdatedTimeKey;
+
+UIKIT_EXTERN NSString *const MJRefreshHeaderIdleText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderPullingText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderRefreshingText;
+
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterIdleText;
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterRefreshingText;
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterNoMoreDataText;
+
+UIKIT_EXTERN NSString *const MJRefreshBackFooterIdleText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterPullingText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterRefreshingText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterNoMoreDataText;
+
+// 状态检查
+#define MJRefreshCheckState \
+MJRefreshState oldState = self.state; \
+if (state == oldState) return; \
+[super setState:state];

Example/Pods/MJRefresh/MJRefresh/MJRefreshConst.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+#import <UIKit/UIKit.h>
+
+const CGFloat MJRefreshHeaderHeight = 54.0;
+const CGFloat MJRefreshFooterHeight = 44.0;
+const CGFloat MJRefreshFastAnimationDuration = 0.25;
+const CGFloat MJRefreshSlowAnimationDuration = 0.4;
+
+NSString *const MJRefreshKeyPathContentOffset = @"contentOffset";
+NSString *const MJRefreshKeyPathContentInset = @"contentInset";
+NSString *const MJRefreshKeyPathContentSize = @"contentSize";
+NSString *const MJRefreshKeyPathPanState = @"state";
+
+NSString *const MJRefreshHeaderLastUpdatedTimeKey = @"MJRefreshHeaderLastUpdatedTimeKey";
+
+NSString *const MJRefreshHeaderIdleText = @"下拉可以刷新";
+NSString *const MJRefreshHeaderPullingText = @"松开立即刷新";
+NSString *const MJRefreshHeaderRefreshingText = @"正在刷新数据中...";
+
+NSString *const MJRefreshAutoFooterIdleText = @"点击或上拉加载更多";
+NSString *const MJRefreshAutoFooterRefreshingText = @"正在加载更多的数据...";
+NSString *const MJRefreshAutoFooterNoMoreDataText = @"已经全部加载完毕";
+
+NSString *const MJRefreshBackFooterIdleText = @"上拉可以加载更多";
+NSString *const MJRefreshBackFooterPullingText = @"松开立即加载更多";
+NSString *const MJRefreshBackFooterRefreshingText = @"正在加载更多的数据...";
+NSString *const MJRefreshBackFooterNoMoreDataText = @"已经全部加载完毕";
\ No newline at end of file

Example/Pods/MJRefresh/MJRefresh/UIScrollView+MJExtension.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIScrollView+Extension.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 14-5-28.
+//  Copyright (c) 2014年 小码哥. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIScrollView (MJExtension)
+@property (assign, nonatomic) CGFloat mj_insetT;
+@property (assign, nonatomic) CGFloat mj_insetB;
+@property (assign, nonatomic) CGFloat mj_insetL;
+@property (assign, nonatomic) CGFloat mj_insetR;
+
+@property (assign, nonatomic) CGFloat mj_offsetX;
+@property (assign, nonatomic) CGFloat mj_offsetY;
+
+@property (assign, nonatomic) CGFloat mj_contentW;
+@property (assign, nonatomic) CGFloat mj_contentH;
+@end

Example/Pods/MJRefresh/MJRefresh/UIScrollView+MJExtension.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIScrollView+Extension.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 14-5-28.
+//  Copyright (c) 2014年 小码哥. All rights reserved.
+//
+
+#import "UIScrollView+MJExtension.h"
+#import <objc/runtime.h>
+
+@implementation UIScrollView (MJExtension)
+
+- (void)setMj_insetT:(CGFloat)mj_insetT
+{
+    UIEdgeInsets inset = self.contentInset;
+    inset.top = mj_insetT;
+    self.contentInset = inset;
+}
+
+- (CGFloat)mj_insetT
+{
+    return self.contentInset.top;
+}
+
+- (void)setMj_insetB:(CGFloat)mj_insetB
+{
+    UIEdgeInsets inset = self.contentInset;
+    inset.bottom = mj_insetB;
+    self.contentInset = inset;
+}
+
+- (CGFloat)mj_insetB
+{
+    return self.contentInset.bottom;
+}
+
+- (void)setMj_insetL:(CGFloat)mj_insetL
+{
+    UIEdgeInsets inset = self.contentInset;
+    inset.left = mj_insetL;
+    self.contentInset = inset;
+}
+
+- (CGFloat)mj_insetL
+{
+    return self.contentInset.left;
+}
+
+- (void)setMj_insetR:(CGFloat)mj_insetR
+{
+    UIEdgeInsets inset = self.contentInset;
+    inset.right = mj_insetR;
+    self.contentInset = inset;
+}
+
+- (CGFloat)mj_insetR
+{
+    return self.contentInset.right;
+}
+
+- (void)setMj_offsetX:(CGFloat)mj_offsetX
+{
+    CGPoint offset = self.contentOffset;
+    offset.x = mj_offsetX;
+    self.contentOffset = offset;
+}
+
+- (CGFloat)mj_offsetX
+{
+    return self.contentOffset.x;
+}
+
+- (void)setMj_offsetY:(CGFloat)mj_offsetY
+{
+    CGPoint offset = self.contentOffset;
+    offset.y = mj_offsetY;
+    self.contentOffset = offset;
+}
+
+- (CGFloat)mj_offsetY
+{
+    return self.contentOffset.y;
+}
+
+- (void)setMj_contentW:(CGFloat)mj_contentW
+{
+    CGSize size = self.contentSize;
+    size.width = mj_contentW;
+    self.contentSize = size;
+}
+
+- (CGFloat)mj_contentW
+{
+    return self.contentSize.width;
+}
+
+- (void)setMj_contentH:(CGFloat)mj_contentH
+{
+    CGSize size = self.contentSize;
+    size.height = mj_contentH;
+    self.contentSize = size;
+}
+
+- (CGFloat)mj_contentH
+{
+    return self.contentSize.height;
+}
+@end

Example/Pods/MJRefresh/MJRefresh/UIScrollView+MJRefresh.h

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIScrollView+MJRefresh.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//  给ScrollView增加下拉刷新、上拉刷新的功能
+
+#import <UIKit/UIKit.h>
+#import "MJRefreshConst.h"
+
+@class MJRefreshHeader, MJRefreshFooter;
+
+@interface UIScrollView (MJRefresh)
+/** 下拉刷新控件 */
+@property (strong, nonatomic) MJRefreshHeader *mj_header;
+@property (strong, nonatomic) MJRefreshHeader *header MJRefreshDeprecated("使用mj_header");
+/** 上拉刷新控件 */
+@property (strong, nonatomic) MJRefreshFooter *mj_footer;
+@property (strong, nonatomic) MJRefreshFooter *footer MJRefreshDeprecated("使用mj_footer");
+
+#pragma mark - other
+- (NSInteger)mj_totalDataCount;
+@property (copy, nonatomic) void (^mj_reloadDataBlock)(NSInteger totalDataCount);
+@end

Example/Pods/MJRefresh/MJRefresh/UIScrollView+MJRefresh.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIScrollView+MJRefresh.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 15/3/4.
+//  Copyright (c) 2015年 小码哥. All rights reserved.
+//
+
+#import "UIScrollView+MJRefresh.h"
+#import "MJRefreshHeader.h"
+#import "MJRefreshFooter.h"
+#import <objc/runtime.h>
+
+@implementation NSObject (MJRefresh)
+
++ (void)exchangeInstanceMethod1:(SEL)method1 method2:(SEL)method2
+{
+    method_exchangeImplementations(class_getInstanceMethod(self, method1), class_getInstanceMethod(self, method2));
+}
+
++ (void)exchangeClassMethod1:(SEL)method1 method2:(SEL)method2
+{
+    method_exchangeImplementations(class_getClassMethod(self, method1), class_getClassMethod(self, method2));
+}
+
+@end
+
+@implementation UIScrollView (MJRefresh)
+
+#pragma mark - header
+static const char MJRefreshHeaderKey = '\0';
+- (void)setMj_header:(MJRefreshHeader *)mj_header
+{
+    if (mj_header != self.mj_header) {
+        // 删除旧的，添加新的
+        [self.mj_header removeFromSuperview];
+        [self insertSubview:mj_header atIndex:0];
+        
+        // 存储新的
+        [self willChangeValueForKey:@"mj_header"]; // KVO
+        objc_setAssociatedObject(self, &MJRefreshHeaderKey,
+                                 mj_header, OBJC_ASSOCIATION_ASSIGN);
+        [self didChangeValueForKey:@"mj_header"]; // KVO
+    }
+}
+
+- (MJRefreshHeader *)mj_header
+{
+    return objc_getAssociatedObject(self, &MJRefreshHeaderKey);
+}
+
+#pragma mark - footer
+static const char MJRefreshFooterKey = '\0';
+- (void)setMj_footer:(MJRefreshFooter *)mj_footer
+{
+    if (mj_footer != self.mj_footer) {
+        // 删除旧的，添加新的
+        [self.mj_footer removeFromSuperview];
+        [self addSubview:mj_footer];
+        
+        // 存储新的
+        [self willChangeValueForKey:@"mj_footer"]; // KVO
+        objc_setAssociatedObject(self, &MJRefreshFooterKey,
+                                 mj_footer, OBJC_ASSOCIATION_ASSIGN);
+        [self didChangeValueForKey:@"mj_footer"]; // KVO
+    }
+}
+
+- (MJRefreshFooter *)mj_footer
+{
+    return objc_getAssociatedObject(self, &MJRefreshFooterKey);
+}
+
+#pragma mark - 过期
+- (void)setFooter:(MJRefreshFooter *)footer
+{
+    self.mj_footer = footer;
+}
+
+- (MJRefreshFooter *)footer
+{
+    return self.mj_footer;
+}
+
+- (void)setHeader:(MJRefreshHeader *)header
+{
+    self.mj_header = header;
+}
+
+- (MJRefreshHeader *)header
+{
+    return self.mj_header;
+}
+
+#pragma mark - other
+- (NSInteger)mj_totalDataCount
+{
+    NSInteger totalCount = 0;
+    if ([self isKindOfClass:[UITableView class]]) {
+        UITableView *tableView = (UITableView *)self;
+        
+        for (NSInteger section = 0; section<tableView.numberOfSections; section++) {
+            totalCount += [tableView numberOfRowsInSection:section];
+        }
+    } else if ([self isKindOfClass:[UICollectionView class]]) {
+        UICollectionView *collectionView = (UICollectionView *)self;
+        
+        for (NSInteger section = 0; section<collectionView.numberOfSections; section++) {
+            totalCount += [collectionView numberOfItemsInSection:section];
+        }
+    }
+    return totalCount;
+}
+
+static const char MJRefreshReloadDataBlockKey = '\0';
+- (void)setMj_reloadDataBlock:(void (^)(NSInteger))mj_reloadDataBlock
+{
+    [self willChangeValueForKey:@"mj_reloadDataBlock"]; // KVO
+    objc_setAssociatedObject(self, &MJRefreshReloadDataBlockKey, mj_reloadDataBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
+    [self didChangeValueForKey:@"mj_reloadDataBlock"]; // KVO
+}
+
+- (void (^)(NSInteger))mj_reloadDataBlock
+{
+    return objc_getAssociatedObject(self, &MJRefreshReloadDataBlockKey);
+}
+
+- (void)executeReloadDataBlock
+{
+    !self.mj_reloadDataBlock ? : self.mj_reloadDataBlock(self.mj_totalDataCount);
+}
+@end
+
+@implementation UITableView (MJRefresh)
+
++ (void)load
+{
+    [self exchangeInstanceMethod1:@selector(reloadData) method2:@selector(mj_reloadData)];
+}
+
+- (void)mj_reloadData
+{
+    [self mj_reloadData];
+    
+    [self executeReloadDataBlock];
+}
+@end
+
+@implementation UICollectionView (MJRefresh)
+
++ (void)load
+{
+    [self exchangeInstanceMethod1:@selector(reloadData) method2:@selector(mj_reloadData)];
+}
+
+- (void)mj_reloadData
+{
+    [self mj_reloadData];
+    
+    [self executeReloadDataBlock];
+}
+@end

Example/Pods/MJRefresh/MJRefresh/UIView+MJExtension.h

+// 代码地址: https://github.com/CoderMJLee/MJRefresh
+// 代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIView+Extension.h
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 14-5-28.
+//  Copyright (c) 2014年 小码哥. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIView (MJExtension)
+@property (assign, nonatomic) CGFloat mj_x;
+@property (assign, nonatomic) CGFloat mj_y;
+@property (assign, nonatomic) CGFloat mj_w;
+@property (assign, nonatomic) CGFloat mj_h;
+@property (assign, nonatomic) CGSize mj_size;
+@property (assign, nonatomic) CGPoint mj_origin;
+@end

Example/Pods/MJRefresh/MJRefresh/UIView+MJExtension.m

+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
+//  UIView+Extension.m
+//  MJRefreshExample
+//
+//  Created by MJ Lee on 14-5-28.
+//  Copyright (c) 2014年 小码哥. All rights reserved.
+//
+
+#import "UIView+MJExtension.h"
+
+@implementation UIView (MJExtension)
+- (void)setMj_x:(CGFloat)mj_x
+{
+    CGRect frame = self.frame;
+    frame.origin.x = mj_x;
+    self.frame = frame;
+}
+
+- (CGFloat)mj_x
+{
+    return self.frame.origin.x;
+}
+
+- (void)setMj_y:(CGFloat)mj_y
+{
+    CGRect frame = self.frame;
+    frame.origin.y = mj_y;
+    self.frame = frame;
+}
+
+- (CGFloat)mj_y
+{
+    return self.frame.origin.y;
+}
+
+- (void)setMj_w:(CGFloat)mj_w
+{
+    CGRect frame = self.frame;
+    frame.size.width = mj_w;
+    self.frame = frame;
+}
+
+- (CGFloat)mj_w
+{
+    return self.frame.size.width;
+}
+
+- (void)setMj_h:(CGFloat)mj_h
+{
+    CGRect frame = self.frame;
+    frame.size.height = mj_h;
+    self.frame = frame;
+}
+
+- (CGFloat)mj_h
+{
+    return self.frame.size.height;
+}
+
+- (void)setMj_size:(CGSize)mj_size
+{
+    CGRect frame = self.frame;
+    frame.size = mj_size;
+    self.frame = frame;
+}
+
+- (CGSize)mj_size
+{
+    return self.frame.size;
+}
+
+- (void)setMj_origin:(CGPoint)mj_origin
+{
+    CGRect frame = self.frame;
+    frame.origin = mj_origin;
+    self.frame = frame;
+}
+
+- (CGPoint)mj_origin
+{
+    return self.frame.origin;
+}
+@end

Example/Pods/Manifest.lock

+PODS:
+  - GMRefresh (0.1.0):
+    - MJRefresh (~> 3.1.0)
+  - MJRefresh (3.1.0)
+
+DEPENDENCIES:
+  - GMRefresh (from `../`)
+
+EXTERNAL SOURCES:
+  GMRefresh:
+    :path: "../"
+
+SPEC CHECKSUMS:
+  GMRefresh: fc60ee05785ff73b535d5b933e1c7f13cdd6ede0
+  MJRefresh: 743e6404967d1c2c688472ea3ecfde247d872db4
+
+COCOAPODS: 0.39.0

Example/Pods/Pods.xcodeproj/xcshareddata/xcschemes/GMRefresh.xcscheme

+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0700"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForAnalyzing = "YES"
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES">
+            <BuildableReference
+               BuildableIdentifier = 'primary'
+               BlueprintIdentifier = '9C85BB2C94B5EA4880AC537A'
+               BlueprintName = 'GMRefresh'
+               ReferencedContainer = 'container:Pods.xcodeproj'
+               BuildableName = 'GMRefresh.framework'>
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      buildConfiguration = "Debug">
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      buildConfiguration = "Debug"
+      allowLocationSimulation = "YES">
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES"
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Example/Pods/Target Support Files/GMRefresh/GMRefresh-dummy.m

+#import <Foundation/Foundation.h>
+@interface PodsDummy_GMRefresh : NSObject
+@end
+@implementation PodsDummy_GMRefresh
+@end

Example/Pods/Target Support Files/GMRefresh/GMRefresh-prefix.pch

+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+

Example/Pods/Target Support Files/GMRefresh/GMRefresh-umbrella.h

+#import <UIKit/UIKit.h>
+
+#import "GMRefresh.h"
+#import "GMRefreshConstant.h"
+#import "GMRefreshFooter.h"
+#import "GMRefreshHeader.h"
+
+FOUNDATION_EXPORT double GMRefreshVersionNumber;
+FOUNDATION_EXPORT const unsigned char GMRefreshVersionString[];
+

Example/Pods/Target Support Files/GMRefresh/GMRefresh.modulemap

+framework module GMRefresh {
+  umbrella header "GMRefresh-umbrella.h"
+
+  export *
+  module * { export * }
+}

Example/Pods/Target Support Files/GMRefresh/GMRefresh.xcconfig

+GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Private/GMRefresh" "${PODS_ROOT}/Headers/Public"
+PODS_ROOT = ${SRCROOT}
+SKIP_INSTALL = YES
\ No newline at end of file

Example/Pods/Target Support Files/MJRefresh/MJRefresh-dummy.m

+#import <Foundation/Foundation.h>
+@interface PodsDummy_MJRefresh : NSObject
+@end
+@implementation PodsDummy_MJRefresh
+@end