Question

一旦我使用addGestureRecognizer来解除scrollView中的键盘，collectionView的didSelectItemAt将无效。有什么建议吗？

更新代码：目前我可以点按以关闭键盘并点击以对收集单元格执行某些操作。但是，如果我滑动scrollView，键盘将解除。有什么方法可以阻止它吗？

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

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

代码：

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

代表实施：

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

Answer 2

请勿使用手势识别器。这是拦截您的水龙头而不是将它们提供给集合视图。而是将您的view.endEditing(true)方法调用collectionView(_:didSelectItemAt:)。

使用UITapGestureRecognizer时，collectionView的didSelectItemAt不会被调用

2 个答案: