我将 UIGestureReconizer 添加到视图以检测 Touch Down 动作，但是视图上方的按钮将不再起作用

Question

我有一个视图需要检测全视图的"Touch Down"动作，在我发现普通的UITapGestureRecognizer无法完成后，我自定义了UIestureRecognizer class来实现它，using this.

所以它确实有效，但我在视图上有几个按钮，在我可以检测到视图的 Touch Down 操作后，这些按钮停止工作。我需要它们都工作，视图检测 Touch Down 并且可以在视图上方按下按钮。我怎样才能实现它？

明确地说，那些按钮只需要检测正常的 Touch Up Inside 动作，只有视图需要检测 Touch Down 动作。此外，当按钮上发生触摸事件时，视图不需要对触摸事件做出反应。

谢谢。

import UIKit
import UIKit.UIGestureRecognizerSubclass

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let t = SingleTouchDownGestureRecognizer(target: self, action: #selector(handleTap(sender:)))
        self.view.addGestureRecognizer(t)

    }

    @objc func handleTap(sender: UITapGestureRecognizer? = nil) {

        self.view.backgroundColor = #colorLiteral(red: 0.2392156869, green: 0.6745098233, blue: 0.9686274529, alpha: 1)
        UIView.animate(withDuration: 1) {
            self.view.backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
        }

    }
    @IBAction func testBtnPressed(_ sender: Any) {
        print("testBtnPressed!")
    }

}

class SingleTouchDownGestureRecognizer: UIGestureRecognizer {
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        if self.state == .possible {
            self.state = .recognized
        }
    }
    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
        self.state = .failed
    }
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
        self.state = .failed
    }
}

Answer 1

您可以将 touchesBegan 中的事件与视图的触摸进行比较，该视图与您的手势识别器已分配的视图相同

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        guard let view = self.view else { return }
        guard let touches = event.touches(for: view) else { return }
        super.touchesBegan(touches, with: event)
        if self.state == .possible {
            self.state = .recognized
        }
    }

我将 UIGestureReconizer 添加到视图以检测 Touch Down 动作，但是视图上方的按钮将不再起作用

I add a UIGestureReconizer to a view to detect Touch Down action, but then the buttons above the view won't work anymore

uigesturerecognizer

ios

swift