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//
// PreListView.m
// Gengmei
//
// Created by Sean Lee on 4/7/15.
// Copyright (c) 2015 Wanmeichuangyi. All rights reserved.
//
#import "GMPreviewListView.h"
#import <Masonry/Masonry.h>
#import <Constant.h>
@interface GMPreviewListView ()<GMPreviewCellDelegate, UIScrollViewDelegate>
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) GMPreviewCell *defaultCell;
@property (nonatomic, assign) BOOL hasDelete;
@property (nonatomic, assign) BOOL frontMove;
@property (nonatomic, assign) int moveCount;
@end
@implementation GMPreviewListView
- (void)setup{
[super setup];
self.backgroundColor = UIColor.whiteColor;
_previewList = [[NSMutableArray alloc] init];
_hasDelete = NO;
_moveCount = 0;
_scrollView = [[UIScrollView alloc] init];
_scrollView.delegate = self;
_scrollView.backgroundColor = UIColor.whiteColor;
_scrollView.scrollEnabled = YES;
_scrollView.directionalLockEnabled = YES;
_scrollView.showsVerticalScrollIndicator = NO;
_scrollView.showsHorizontalScrollIndicator = YES;
// _scrollView.alwaysBounceHorizontal = YES;
_scrollView.contentSize = [self contentSizeForUIScrollView:0];
[self addSubview:_scrollView];
if (!_cellWH) {
_cellWH = self.cellWH;
}
_defaultCell = [[GMPreviewCell alloc] initWithFrame:CGRectMake(0, 0,PREVIRE_CELL_HEIGHT, PREVIRE_CELL_HEIGHT) image:[UIImage imageNamed:@"camera"]];
_defaultCell.tag = 1000;
_defaultCell.delegate = self;
[_scrollView addSubview:_defaultCell];
[self scrollViewAbleScroll];
}
- (void)setDefaultCellImage:(UIImage *)defaultCellImage {
_defaultCellImage = defaultCellImage;
if (_defaultCellImage != nil) {
_defaultCell.image = _defaultCellImage;
}
}
- (NSInteger)cellWH {
if (_cellWH > 0) {
CGRect rect = _defaultCell.frame;
rect.size.width = _cellWH;
rect.size.height = _cellWH;
_defaultCell.frame = rect;
} else {
_cellWH = PREVIRE_CELL_HEIGHT;
}
return _cellWH;
}
- (void)updateConstraints{
[_scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(00);
make.top.mas_equalTo(00);
make.right.mas_equalTo(0);
make.bottom.mas_equalTo(0);
}];
[super updateConstraints];
}
/*
* @brief 根据index获取UIScrollView的ContentSize
*/
- (CGSize)contentSizeForUIScrollView:(NSInteger)index
{
float width = (PREVIRE_CELL_SPACE + self.cellWH) * index;
if (width < _scrollView.bounds.size.width)
width = _scrollView.bounds.size.width;
return CGSizeMake(width, PREVIRE_CELL_HEIGHT);
}
- (void)scrollViewAbleScroll
{
_scrollView.contentSize = [self contentSizeForUIScrollView:(_previewList.count + 1)];
[_scrollView scrollRectToVisible:CGRectMake(_scrollView.contentSize.width - self.cellWH, 0, self.cellWH, self.frame.size.height) animated:YES];
}
- (GMPreviewCell * ) addImage:(UIImage *)image{
GMPreviewCell * newPreviewCell = nil;
CGFloat x = (_previewList.count) * (PREVIRE_CELL_SPACE + self.cellWH);
newPreviewCell = [[GMPreviewCell alloc] initWithFrame:CGRectMake(x, 0, self.cellWH, self.cellWH) image:image];
newPreviewCell.alpha = 0.1;
newPreviewCell.delegate = self;
[_previewList addObject:newPreviewCell];
[_scrollView addSubview:newPreviewCell];
[self scrollViewAbleScroll];
_defaultCell.alpha = 0.5;
[UIView animateWithDuration:DURATION animations:^(){
CGRect rect = _defaultCell.frame;
rect.origin.x += (PREVIRE_CELL_SPACE + self.cellWH);
_defaultCell.frame = rect;
_defaultCell.alpha = 1.0;
newPreviewCell.alpha = 0.8;
} completion:^(BOOL finished){
newPreviewCell.alpha = 1.0;
}];
return newPreviewCell;
}
#pragma -- mark PreviewCellDelegate
- (void)prepareAddPreviewCell:(GMPreviewCell *)cell{
if ([self.delegate respondsToSelector:@selector(addPreviewCell)]) {
[self.delegate addPreviewCell];
}
}
- (void)prepareDeletePreviewCell:(GMPreviewCell *)cell{
NSInteger index = [_previewList indexOfObject:cell];
//设置相关Cell的透明度
cell.alpha = 0.8;
// 判断其余cell的移动方向（从前向后移动/从后向前移动）
_frontMove = NO;
if (_previewList.count - 1 > DEFAULT_VISIBLE_COUNT
&& (_previewList.count - index - 1) <= DEFAULT_VISIBLE_COUNT) {
_frontMove = YES;
}
if (index == _previewList.count - 1 && !_frontMove)
_defaultCell.alpha = 0.5;
[UIView animateWithDuration:DURATION animations:^(){
//其余defautlCell依次移动
if (_frontMove)
{
//前面的向后移动
for (int i = 0; i < index; i++) {
GMPreviewCell *cell = _previewList[i];
CGRect rect = cell.frame;
rect.origin.x += (PREVIRE_CELL_SPACE + self.cellWH);
cell.frame = rect;
}
_moveCount++;
}
else
{
//后面的向前移动
for (NSInteger i = index + 1; i < _previewList.count; i++) {
GMPreviewCell *cell = _previewList[i];
CGRect rect = cell.frame;
rect.origin.x -= (PREVIRE_CELL_SPACE + self.cellWH);
cell.frame = rect;
}
//defautlCell向前移动
CGRect rect = _defaultCell.frame;
rect.origin.x -= (PREVIRE_CELL_SPACE + self.cellWH);
_defaultCell.frame = rect;
_defaultCell.alpha = 1.0;
}
cell.alpha = 0.0;
} completion:^(BOOL finished){
if ([self.delegate respondsToSelector:@selector(deletePreviewCell:)]) {
[self.delegate deletePreviewCell:index];
}
//删除被点击的cell
[cell removeFromSuperview];
[_previewList removeObject:cell];
if (_previewList.count <= DEFAULT_VISIBLE_COUNT){
[_scrollView setContentOffset:CGPointMake(0, 0) animated:NO];
_scrollView.contentSize = [self contentSizeForUIScrollView:0];
}
if (_frontMove) {
[self isNeedResetFrame];
}
}];
_hasDelete = YES;
}
/**大图模式*/
- (void)didSelectedPreviewCell:(GMPreviewCell *)cell{
if ([self.delegate respondsToSelector:@selector(fullScreenImage:)]) {
[self.delegate fullScreenImage:cell];
}
}
- (void)prepareRetryUploadPreviewCell:(GMPreviewCell *)cell{
if ([self.delegate respondsToSelector:@selector(retryUploadPreviewCell:)]) {
[self.delegate retryUploadPreviewCell:cell];
}
}
/**
* @brief 当删除操作是前面的unitCell向后移动时
* 做滚动操作或者添加操作需要重新设置每个unitCell的frame
*/
- (void)isNeedResetFrame
{
if (_frontMove && _moveCount > 0) {
for (int i = 0; i < _previewList.count; i++) {
GMPreviewCell *cell = [_previewList objectAtIndex:(NSUInteger) i];
CGRect rect = cell.frame;
rect.origin.x -= (PREVIRE_CELL_SPACE + self.cellWH) * _moveCount;
cell.frame = rect;
}
CGRect rect = _defaultCell.frame;
rect.origin.x -= (PREVIRE_CELL_SPACE + self.cellWH) * _moveCount;
_defaultCell.frame = rect;
_frontMove = NO;
_moveCount = 0;
}
if (_hasDelete)
{
_scrollView.contentSize = [self contentSizeForUIScrollView:(_previewList.count + 1)];
_hasDelete = !_hasDelete;
}
}
/*** @brief 开始上传，显示loading */
- (void)showLoadingAtIndex:(NSInteger)index{
GMPreviewCell * cell = _previewList[index];
[cell.retryButton setHidden:YES];
[cell.deleteButton setHidden:YES];
[cell.indicatorView setHidden:NO];
[cell.indicatorView startAnimating];
}
/*** @brief 上传成功，隐藏loading */
- (void)hideLoadingAtIndex:(NSInteger)index{
GMPreviewCell * cell = _previewList[index];
[cell.retryButton setHidden:YES];
[cell.deleteButton setHidden:NO];
[cell.indicatorView setHidden:YES];
[cell.indicatorView stopAnimating];
}
/*** @brief 重新上传loading */
- (void)retryLoadingAtIndex:(NSInteger)index{
if (index > _previewList.count - 1){
return;
}
GMPreviewCell * cell = _previewList[index];
[cell.retryButton setHidden:NO];
[cell.deleteButton setHidden:NO];
[cell.indicatorView setHidden:YES];
[cell.indicatorView stopAnimating];
}
@end