如何在保持单元格选择的同时向UICollectionView添加点击手势？ [英] How to add tap gesture to UICollectionView , while maintaining cell selection?

问题描述

向 UICollectionView 添加单击手势，不要妨碍单元格选择。

Add a single tap gesture to UICollectionView, do not get in the way of cell selection.

我想在collectionView的no-cell部分进行一些其他的点击。

I want some other taps on the no-cell part of the collectionView.

使用XCode8，Swift 3.

Using XCode8, Swift 3.

override func viewDidLoad() {
    ...
    collectionView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tap)))
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    print(indexPath)
}

func tap(sender: UITapGestureRecognizer){
    print("tapped")
}

结果

是的，它会妨碍现在。当你点击单元格时，它会记录点击。

Result

Yeah, it gets in the way now. When you tap on cell, it logs "tapped".

• 我检查了collectionView和单元格的hitTest返回值。两者都返回了tapped单元格，这意味着它们形成了一个响应者链的Cell - > CollectionView


• 没有关于单元格的手势


• 3手势在collectionView上，没有人似乎使用单元格选择
  
  
  
  
  • UIScrollViewDelayedTouchesBeganGestureRecognizer
  
  
  • UIScrollViewPanGestureRecognizer
  
  
  • UITapGestureRecognizer
  
  
  • I check the hitTest return value of the collectionView and the cell. Both returned the tapped cell, which means they form a responder chain of Cell -> CollectionView
  • no gestures on the cell
  • 3 gestures on collectionView, no one seems to work with the cell select
    • UIScrollViewDelayedTouchesBeganGestureRecognizer
    • UIScrollViewPanGestureRecognizer
    • UITapGestureRecognizer

    找不到更多的痕迹。关于如何实现细胞选择或实现此任务的任何想法？

    Couldn't find more trace. Any ideas on how cell selection is implemented or to achieve this task?

    推荐答案

    每当你想要添加一个手势识别器，但不是从目标视图中窃取触摸，您应该设置 UIGestureRecognizer。将 gestureRecognizer 实例的cancelsTouchesInView 取消为false。

    Whenever you want to add a gesture recognizer, but not steal the touches from the target view, you should set UIGestureRecognizer.cancelsTouchesInView for your gestureRecognizer instance to false.

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