update

GMPhobos/Classes/Exposure/UIView+Tracker.h

@@ -22,6 +22,9 @@
  */
 + (UIViewController *)currentControllerForView:(UIView *)view;
 
+/// 判断当前view是否处于屏幕上
+/// @param view 指定view
++ (BOOL)viewIsVisible:(UIView *)view;
 /**
  获取曝光卡片所在的位置
 */

GMPhobos/Classes/Exposure/UIView+Tracker.m

@@ -114,6 +114,36 @@
     otherView.pageCtrl.down_loading_times = self.pageCtrl.down_loading_times;
 }
 
+/// 判断当前view是否处于屏幕上
+/// @param view 指定view
++ (BOOL)viewIsVisible:(UIView *)view {
+    // 可见
+    if (!view.window || view.hidden || view.layer.hidden || !view.alpha) {
+        
+        return NO;
+    }
+    
+    UIView *current = view;
+    while ([current isKindOfClass:[UIView class]]) {
+        if (current.alpha <= 0 || current.hidden) {
+            return NO;
+        }
+        current = current.superview;
+    }
+    
+    // 判断当前View 与 view所在window是否存在交集
+    CGRect viewRectInWindow = [view convertRect:view.bounds toView:view.window];
+    BOOL isIntersects = CGRectIntersectsRect(view.window.bounds, viewRectInWindow);
+    
+    if (isIntersects) {
+        // 获取View 与 view所在window的相交区域
+        CGRect intersectRect = CGRectIntersection(view.window.bounds, viewRectInWindow);
+        if (intersectRect.size.width != 0.f && intersectRect.size.height != 0.f) {
+            return YES;
+        }
+    }
+    return NO;
+}
 
 #pragma mark - GMViewExposureProtocol
 - (void)setVisibleView:(BOOL)visibleView {