ios - TouchesBegan 总是返回错误的 UIView

Question

我想检测何时触摸其他地方而不是特定的 UIView 。我正在使用touchesBegan然而，对于它，它总是打印“触摸在外面”(参见下面的代码)。我错过了什么？

我从中得到了帮助post .

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let hitView = self.view.hitTest(touch.location(in: self.view), with: event)
        if hitView === checkBackContainer {
            print("touch is inside")
        } else {
            print("touch is outside")
        }
    }
    super.touchesBegan(touches, with: event)
}

在ViewDidLoad内添加了 anchor 功能

private lazy var checkBackContainer = ImageUploadContainerView()

override func viewDidLoad(){
self.view.addSubview(checkBackContainer)
checkBackContainer.anchorCenterXToSuperview()
checkBackContainer.topAnchor.constraint(equalTo: checkFrontContainer.bottomAnchor, constant: 20).isActive = true
checkBackContainer.leftAnchor.constraint(equalTo: self.view.leftAnchor, constant: 25).isActive = true
checkBackContainer.rightAnchor.constraint(equalTo: self.view.rightAnchor, constant: -25).isActive = true
checkBackContainer.heightAnchor.constraint(equalTo: checkBackContainer.widthAnchor, multiplier: 0.42).isActive = true
checkBackContainer.layer.applySketchShadow(color: UIColor.white, alpha: 1.0, x: 0, y: 0.33, blur: 1, spread: 0, cornerRadius: 6)

let backTap = UITapGestureRecognizer(target: self, action: #selector(self.backContainerTapped(_:)))
checkBackContainer.addGestureRecognizer(backTap) }

编辑: ContainerView 是自定义的 UIView其中有一些UIStackView s，UIlabel和 UIImageView就在里面。我发现是因为自定义UIView ，当我用常规 UIView 更改它时。它正在工作。

Answer 1

尝试将 UIGestureRecognizer 添加到您想要在触摸时检测到的 View :

let tap = UITapGestureRecognizer(target: self, action: #selector(didTap(sender:)))
view1.addGestureRecognizer(tap)
view2.addGestureRecognizer(tap)

@objc func didTap(sender: UITapGestureRecognizer) {
//Perform whatever you want in here
}

或者，您可以循环遍历父 View 的所有 subview 并排除您想要排除的任何 View ，如下所示:

for view in self.view.subviews {
   if view != viewYouWantToExclude {
      view.addGestureRecognizer(tap)
   }
}