Question

现在，我在collectionview单元格中有一堆消息。我现在点击单元格的代码是

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

如何使它仅在双击时才能打印？

Answer 1

您可以在集合视图中添加UITapGestureRecognizer。

  private var doubleTapGesture: UITapGestureRecognizer!
    func setUpDoubleTap() {
        doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didDoubleTapCollectionView))
        doubleTapGesture.numberOfTapsRequired = 2
        collectionView.addGestureRecognizer(doubleTapGesture)
        doubleTapGesture.delaysTouchesBegan = true
    }

从您的 viewDidLoad 以上述方式调用

override func viewDidLoad() {
        super.viewDidLoad()
        setUpDoubleTap()
    }

然后在您的课程中添加Gesture选择器方法

 @objc func didDoubleTapCollectionView() {
        let pointInCollectionView = doubleTapGesture.location(in: collectionView)
        if let selectedIndexPath = collectionView.indexPathForItem(at: pointInCollectionView) {
            let selectedCell = collectionView.cellForItem(at: selectedIndexPath)
            // Print double tapped cell's path
            print("Which cell: ", selectedIndexPath.row)
            print(" double tapped")
        }
    }

didDoubleTapCollectionView 方法仅在您双击集合视图单元格项目时才会调用。

我希望以上示例能够解决您的问题。

Answer 2

 override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "customCell", for: indexPath) as! customCell
    let tapCell = UITapGestureRecognizer(target: self, action: #selector(self.doubleTap(selectedIndex:)))
    tapCell.numberOfTapsRequired=2
    cell.tag=indexPath.row
    cell.addGestureRecognizer(tapCell)
    return cell
}

@objc func doubleTap(gesture: UITapGestureRecognizer){
    print("Selected Index Is", gesture.view?.tag)
}

如何快速双击（而不是单击）收藏视图单元格？

2 个答案: