- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {/*如果用户一旦接触scrollview就返回YES,有可能还没有开始拖动@property(nonatomic,readonly,getter=isTracking)     BOOL tracking;如果用户已经开始拖动就返回YES，@property(nonatomic,readonly,getter=isDragging)     BOOL dragging;如果用户没有在拖动（手指没有接触scrollview）就返回YES，但是scrollview仍然在惯性滑动@property(nonatomic,readonly,getter=isDecelerating) BOOL decelerating;*/BOOL scrollToScrollStop = !self.tableView.isTracking && !self.tableView.isDragging && !self.tableView.isDecelerating;if (scrollToScrollStop) {[self _scrollViewDidStopScroll];}
}- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {if (!decelerate) {BOOL dragToDragStop = !self.tableView.isTracking && !self.tableView.isDragging && !self.tableView.isDecelerating;if (dragToDragStop) {[self _scrollViewDidStopScroll];}}
}- (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView {[self _scrollViewDidStopScroll];
}- (void)scrollViewDidScroll:(UIScrollView *)scrollView {[self _scrollViewScrolling];
}- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {[self _scrollViewBeginDragging];
}#pragma mark - helper- (void)_scrollViewDidStopScroll {NSLog(@"tableview已经停止滚动");
}- (void)_scrollViewBeginDragging {self.zf_lastOffsetY = self.tableView.contentOffset.y;
}- (void)_scrollViewScrolling {CGFloat offsetY = self.tableView.contentOffset.y;self.zf_scrollDerection = (offsetY - self.zf_lastOffsetY > 0) ? ZFPlayerScrollDerectionUp : ZFPlayerScrollDerectionDown;self.zf_lastOffsetY = offsetY;NSLog(@"%@======self.tableView.contentOffset.y %.0f",self.zf_scrollDerection == ZFPlayerScrollDerectionUp ? @"向上滑动" :@"向下滑动",offsetY);// 当tablview已经无法正常向下滑动，此时如果一直向下拖动tableview，就无需继续执行以下逻辑代码。if (self.tableView.contentOffset.y < 0) return;// 如果当前没有播放的cell，就无需继续执行以下逻辑代码。if (!self.zf_playingIndexPath) return;UIView *cell = [self zf_getCellForIndexPath:self.zf_playingIndexPath];if (!cell) {NSLog(@"没有正在播放视频的cell");return;}UIView *playerView = [cell viewWithTag:1000];CGRect rect = [playerView convertRect:playerView.frame toView:self.view];NSLog(@"把containerView转换rect到VC.view上，与tableview同级");CGFloat topSpacing = CGRectGetMinY(rect) - CGRectGetMinY(self.tableView.frame) - CGRectGetMinY(playerView.frame) - self.tableView.contentInset.top;NSLog(@"当前播放的View距离Tableview<上>边界距离（frame高度）：%f",topSpacing);CGFloat bottomSpacing = CGRectGetMaxY(self.tableView.frame) - CGRectGetMaxY(rect) + CGRectGetMinY(playerView.frame) - self.tableView.contentInset.bottom;NSLog(@"当前播放的View距离Tableview<下>边界距离（frame高度）：%f",bottomSpacing);CGFloat contentInsetHeight = CGRectGetMaxY(self.tableView.frame) - CGRectGetMinY(self.tableView.frame) - self.tableView.contentInset.top - self.tableView.contentInset.bottom;NSLog(@"当前tableview的内容高度：%f",contentInsetHeight);CGFloat playerDisapperaPercent = 0;CGFloat playerApperaPercent = 0;// 向上滑动if (self.zf_scrollDerection == ZFPlayerScrollDerectionUp) { /// Scroll up/// Player is disappearing./*场景分析:当前播放器位于屏幕中间，向上滑动此时尚未滑出屏幕前 topSpacing-正数 playerDisapperaPercent-负数，一旦播放器上边界滑出屏幕playerDisapperaPercent-> 正数并逐步大于1.0，此时已经呈现播放器正逐步离开当前屏幕有效区域*/if (topSpacing <= 0 && CGRectGetHeight(rect) != 0) {playerDisapperaPercent = -topSpacing/CGRectGetHeight(rect);if (playerDisapperaPercent > 1.0) playerDisapperaPercent = 1.0;NSLog(@"当前播放视频的cell正在离开当前屏幕有效播放区域。。。。。。");}/// Top areaif (topSpacing <= 0 && topSpacing > -CGRectGetHeight(rect)/2) {NSLog(@"当前播放视频的cell《即将离开》当前屏幕有效播放区域。。。。。。");} else if (topSpacing <= -CGRectGetHeight(rect)) {NSLog(@"当前播放视频的cell《已经离开》当前屏幕有效播放区域。。。。。。");} else if (topSpacing > 0 && topSpacing <= contentInsetHeight) {if (CGRectGetHeight(rect) != 0) {playerApperaPercent = -(topSpacing-contentInsetHeight)/CGRectGetHeight(rect);if (playerApperaPercent > 1.0) playerApperaPercent = 1.0;NSLog(@"当前播放视频的cell在当前屏幕有效播放区域上持续出现。。。。。。");}if (topSpacing <= contentInsetHeight && topSpacing > contentInsetHeight-CGRectGetHeight(rect)/2) {NSLog(@"当前播放视频的cell《即将出现》在当前屏幕有效播放区域。。。。。。");} else {NSLog(@"当前播放视频的cell《已经出现》在当前屏幕有效播放区域。。。。。。");}}} else if (self.zf_scrollDerection == ZFPlayerScrollDerectionDown) { /// 向下滑动if (bottomSpacing <= 0 && CGRectGetHeight(rect) != 0) {playerDisapperaPercent = -bottomSpacing/CGRectGetHeight(rect);if (playerDisapperaPercent > 1.0) playerDisapperaPercent = 1.0;NSLog(@"当前播放视频的cell正在离开当前屏幕有效播放区域。。。。。。");}if (bottomSpacing <= 0 && bottomSpacing > -CGRectGetHeight(rect)/2) {NSLog(@"当前播放视频的cell《即将离开》当前屏幕有效播放区域。。。。。。");} else if (bottomSpacing <= -CGRectGetHeight(rect)) {NSLog(@"当前播放视频的cell《已经离开》当前屏幕有效播放区域。。。。。。");} else if (bottomSpacing > 0 && bottomSpacing <= contentInsetHeight) {if (CGRectGetHeight(rect) != 0) {playerApperaPercent = -(bottomSpacing-contentInsetHeight)/CGRectGetHeight(rect);if (playerApperaPercent > 1.0) playerApperaPercent = 1.0;NSLog(@"当前播放视频的cell在当前屏幕有效播放区域上持续出现。。。。。。");}if (bottomSpacing <= contentInsetHeight && bottomSpacing > contentInsetHeight-CGRectGetHeight(rect)/2) {NSLog(@"当前播放视频的cell《即将出现》在当前屏幕有效播放区域。。。。。。");} else {NSLog(@"当前播放视频的cell《已经出现》在当前屏幕有效播放区域。。。。。。");}}}
}- (UIView *)zf_getCellForIndexPath:(NSIndexPath *)indexPath {if (indexPath) {UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];if (cell) {return cell;}}return nil;
}