从重叠视图触发 UITapGestureRecognizers

Question

我有一个主视图和主视图的 4 个子视图，它们都有自己的 UITapGestureRecognizer，当我点击一个子视图时，如何触发两个视图。下面的示例，

如果我点击以查看 1 个所需日志，则为：

subview1 is clicked
MainView is clicked

我的代码

override func viewDidLoad() {

    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    let mainGesture = UITapGestureRecognizer(target: self, action: #selector(mainGestureActivated))

    self.view.addGestureRecognizer(mainGesture)

    let subGesture = UITapGestureRecognizer(target: self, action: #selector(subViewGestureActivated))

    self.subview1.addGestureRecognizer(subGesture)


}

@objc func mainGestureActivated(){
    print("MainView Clicked")
}

@objc func subViewGestureActivated(){
    print("Subview Clicked")
}

它只打印被点击的子视图！是否可以同时触发两个 gestureRecognizers，因为 main 正在封装其他。

Answer 1

首先你应该在你的VC中符合UIGestureRecognizerDelegate，然后实现shouldRecognizeSimultaneouslyWith的委托函数。在函数内部，你应该检测gestureRecognizer和otherGestureRecognizer是否是你想要的，如果是，你应该让他们同时工作，

符合委托，并在viewDidLoad之外声明手势识别器（因为稍后需要在委托方法中访问它们。）

var mainGestureRecognizer = UITapGestureRecognizer() var subGestureRecognizer = UITapGestureRecognizer()

初始化您的识别器，并将您的 VC 设置为它们的代表：

mainGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(mainGestureActivated))
subGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(subViewGestureActivated))
mainGestureRecognizer.delegate = self
subGestureRecognizer.delegate = self

实现上面提到的delegate函数，实现subView和mainView同时识别：

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    if gestureRecognizer == subGestureRecognizer && otherGestureRecognizer == mainGestureRecognizer {
        return true
    }

    return false
}

如果你想让它为 4 个不同的子视图工作，那么你应该检查委托方法中的 else if 语句。

从重叠视图触发 UITapGestureRecognizers

Triggering UITapGestureRecognizers from overlapping Views

uiview

ios

uitapgesturerecognizer

swift