UIViewContorller的触摸事件仍然被接收，即使添加了视图

Question

有一个带有两个按钮的简单UIViewController，每次按下按钮时，都会将全屏幕视图添加到viewcontorller的视图中，因为它的大小与viewcontroller相同。

我们知道，如果一个视图重叠其parentView，则父录将无法响应任何事件。

但是，如果我按button0，然后非常快速按button1，则将视图添加到viewcontorller，并且第二个按钮的触摸事件也将唤起。

这是我的代码：

@IBAction func button0Pressed(_ sender: Any) {
        print(#function)
        let view0 = UIView(frame: view.bounds)
        view0.backgroundColor = UIColor.gray
        let tap0 = UITapGestureRecognizer(target: self, action: #selector(tap0(_:)))
        view0.addGestureRecognizer(tap0)
        view.addSubview(view0)
    }
    @objc func tap0(_ gestureRecognizer: UITapGestureRecognizer) {
        print(#function)
        let view = gestureRecognizer.view
        view?.removeFromSuperview()
    }
    @IBAction func button1Pressed(_ sender: Any) {
        print(#function)
        let view1 = UIView(frame: view.bounds)
        view1.backgroundColor = UIColor.lightGray
        let tap1 = UITapGestureRecognizer(target: self, action: #selector(tap1(_:)))
        view1.addGestureRecognizer(tap1)
        view.addSubview(view1)
    }

    @objc func tap1(_ gestureRecognizer: UITapGestureRecognizer) {
        print(#function)
        let view = gestureRecognizer.view
        view?.removeFromSuperview()
    }

out put：

button0Pressed button1Pressed

那么，按下button0之后，如何防止viewcontroller S快速触摸事件？

Answer 1

您可以尝试将两个按钮（Button0和button1）作为IBOutlet，并分配touchUpInside事件以触发button0press/button1press函数。然后，您可以使用按下按钮0的enable按钮1 after x seconds（在我的示例中为1秒）。还有Viceversa。

@IBOutlet weak var button0: UIButton!
@IBOutlet weak var button1: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()
    button0.addTarget(self, action: #selector(button0Pressed), for: .touchUpInside)
    button1.addTarget(self, action: #selector(button1Pressed), for: .touchUpInside)
}
@objc func button0Pressed() {
    print(#function)
    let view0 = UIView(frame: view.bounds)
    view0.backgroundColor = UIColor.gray
    let tap0 = UITapGestureRecognizer(target: self, action: #selector(tap0(_:)))
    view0.addGestureRecognizer(tap0)
    view.addSubview(view0)
    // Enable button1 after 1 second
    DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(1000)) {
        self.button1.isEnabled = true
    }
}
@objc func button1Pressed() {
    print(#function)
    let view1 = UIView(frame: view.bounds)
    view1.backgroundColor = UIColor.lightGray
    let tap1 = UITapGestureRecognizer(target: self, action: #selector(tap1(_:)))
    view1.addGestureRecognizer(tap1)
    view.addSubview(view1)
    // Enable button0 after 1 second
    DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(1000)) {
        self.button0.isEnabled = true
    }
}