如何为 UIViewController.view 中也有 UITapGestureRecognizer 的 UIView 挑出并操作 UITapGestureRecognizer？

Question

我有一个添加了 UITapGestureRecognizer 的 UIView 对象。主视图还有一个 UITapGestureRecognizer，我用它来隐藏键盘。我如何优先处理子 UIView 上的 tapGesture 来做我需要做的事情？我想在点击子视图时触发与此点击相关的操作，而不是主视图的手势。

我尝试在子视图中添加双击以区分这两种手势，但这只会触发主视图的点击操作。

var childView: UIView!

 /**Tap screen event listener - to hide the keyboard*/
 let tapGesture = UITapGestureRecognizer.init(target: self, action: #selector(hideKeyBaord))
 self.view.addGestureRecognizer(tapGesture)


 let doubleTap = UITapGestureRecognizer.init(target: self, action: #selector(doSomethingElse))
 doubleTap.numberOfTouchesRequired = 2
 childView.view.addGestureRecognizer(doubleTap)

Answer 1

一种方法是为 tapGesture 实现 shouldReceiveTouch 委托方法：

extension YourViewController : UIGestureRecognizerDelegate {
    override func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        if gestureRecogniser == tapGesture {
            // tapGesture should not receive the touch when the touch is inside the child view
            let location = touch.location(in: childView)
            return !childView.bounds.contains(location)
        } else {
            return true
        }
    }
}

并记得将 tapGesture 的委托设置为 self。

如何为 UIViewController.view 中也有 UITapGestureRecognizer 的 UIView 挑出并操作 UITapGestureRecognizer？

How to single out and action a UITapGestureRecognizer for a UIView that is in the UIViewController.view that also has a UITapGestureRecognizer?

uigesturerecognizer

swift