[iOS]UITableView或UICollectionView的cell中嵌套UICollectionView后,第二层的CollectionViewCell点击无响应的问题

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如图,UITableView中嵌套UICollectionView后无法点击分享.
之前为了解决这个问题,已经放弃了方式(collectionView:didSelectItemAtIndexPath:),选择使用cell中响应按钮点击的方式.
现在适配iOS13发现,上面这种方式也已经无法响应点击,所以现在适配时选择了点击穿透的方式来处理.

例:

解决:

点击穿透

OC

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{CGPoint bluePoint = [self convertPoint:point toView:self.collectionView];NSInteger index = -1;// 这种方式在iphone 7plus会顺序错误
//    NSArray *cellArr = self.collectionView.visibleCells;
//    for (int i = 0 ; i < cellArr.count ; i ++) {
//        WXYZ_ShareItemCell *curCell = [cellArr objectAtIndex:i];
//        // 判断给定的点是否被一个CGRect包含,可以用CGRectContainsPoint函数
//        BOOL contains = CGRectContainsPoint(curCell.frame, bluePoint);
//        if (contains) {
//            index = i;
//            break;
//        }
//    }NSArray<NSIndexPath *> *indexPathsForVisibleItems = self.collectionView.indexPathsForVisibleItems;for (int i = 0 ; i < indexPathsForVisibleItems.count ; i ++) {NSIndexPath *indexPath = indexPathsForVisibleItems[i];WXYZ_ShareItemCell *curCell = (WXYZ_ShareItemCell *)[self.collectionView cellForItemAtIndexPath:indexPath];// 判断给定的点是否被一个CGRect包含,可以用CGRectContainsPoint函数BOOL contains = CGRectContainsPoint(curCell.frame, bluePoint);if (contains) {index = indexPath.item;break;}}if ([self.collectionView pointInside:bluePoint withEvent:event]) {if (index >= 0) {[self selectCellWithItem:index];}return self.collectionView;} else {return [super hitTest:point withEvent:event];}
}- (void)selectCellWithItem:(NSInteger)index {}

Swift

extension MineListCell {override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {let bluePoint: CGPoint = self.convert(point, to: self.collectionView)var index = -1let indexPathsForVisibleItems = self.collectionView.indexPathsForVisibleItemsfor (ind,obj) in indexPathsForVisibleItems.enumerated() {let indexPath = objif let curCell = self.collectionView.cellForItem(at: indexPath) {let contains = curCell.frame.contains(bluePoint)if contains {index = indexPath.itembreak}}}if self.collectionView.point(inside: bluePoint, with: event) {if index >= 0 {self.selectCellWithItem(index: index)}return self.collectionView} else {return super.hitTest(point, with: event)}}func selectCellWithItem(index: Int) {print(index)}
}

经过实际使用体验, 发现上面点击穿透的方式解决得并不完美. 用这种方式, 你会发现,点击动作还未完,但操作就已经响应.

下面对点击穿透方式进行优化:

1.使用点击穿透记录当前点击的位置

class MineListCell: UICollectionViewCell {// 使用点击穿透记录当前点击的位置var curTapIndex: Int = -1 ......}extension MineListCell {override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {let bluePoint: CGPoint = self.convert(point, to: self.collectionView)var index = -1let indexPathsForVisibleItems = self.collectionView.indexPathsForVisibleItemsfor (ind,obj) in indexPathsForVisibleItems.enumerated() {let indexPath = objif let curCell = self.collectionView.cellForItem(at: indexPath) {let contains = curCell.frame.contains(bluePoint)if contains {index = indexPath.itembreak}}}curTapIndex = indexif self.collectionView.point(inside: bluePoint, with: event) {return super.hitTest(point, with: event)} else {return super.hitTest(point, with: event)}}}

2.在第一层UITableView或UICollectionView代理方法中接受到回调后进行相应的处理

extension MineVC: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {......func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {let cell: MineListCell = collectionView.cellForItem(at: indexPath) as! MineListCellif let items = cell.items, cell.curTapIndex >= 0, items.count > cell.curTapIndex  {let obj: MineItemModel = items[cell.curTapIndex]if let route = obj.route {if let topVC = ScreenUIManager.topViewController() {PushWithRoute(vc: topVC, route: route)}}}}
}

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