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

Question

一旦我使用 addGestureRecognizer 关闭滚动视图中的键盘，collectionView 的 didSelectItemAt 将无法工作。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 scrollView，键盘就会关闭。有什么办法可以防止这种情况发生？

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

不要使用手势识别器。那就是拦截您的点击，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)。

Answer 2

尝试实施UIGestureRecognizerDelegate。在你的代码中实现它的 gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:) 方法到 return true - 这样你的手势识别器就会工作，但它也会允许识别其他手势（特别是 collectionView).

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
    }
}

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

collectionView's didSelectItemAt not called when use it with UITapGestureRecognizer

ios

uiscrollview

uicollectionview

uitapgesturerecognizer

uikeyboard