与 UITapGestureRecognizer 一起使用时未调用 collectionView 的 didSelectItemAt

Question

一旦我使用 addGestureRecognizer 关闭 scrollView 中的键盘，collectionView 的 didSelectItemAt 将不起作用。有什么建议吗？

更新代码：目前我可以点击关闭键盘并点击对收集单元格进行操作。但是，如果我滑动滚动视图，键盘将关闭。有什么办法可以防止吗？

class PostVC: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {

    @IBOutlet weak var colorCollectionView: UICollectionView!
    @IBOutlet weak var scrollView: UIScrollView!
    @IBOutlet weak var titleTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        let tapViewGesture = UITapGestureRecognizer(target: self, action: #selector(PostVC.didTapViewForDismissKeyboard))
        scrollView.addGestureRecognizer(tapViewGesture)
        tapViewGesture.delegate = self
    }

    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool{
        view.endEditing(true)
        return false
    }

    func didTapViewForDismissKeyboard(_ pressed: UIGestureRecognizer) {
        view.endEditing(true)
    }

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

extension PostVC: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }
}

Answer 1

尝试实现UIGestureRecognizerDelegate。在您的代码中实现其 gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:) 方法以返回 true - 这样您的手势识别器将工作，但它也将允许识别其他手势（特别是 collectionView 中的那个）。

代码：

// add this to initializing code to set gesture recognizer's delegate to self
tapViewGesture.delegate = self

委托实施：

extension YourViewController: UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }
}

Answer 2

不要使用手势识别器。那就是拦截您的水龙头而不是将它们提供给集合视图。而是在collectionView(_:didSelectItemAt:) 方法中调用view.endEditing(true)。