xcode 检测用户点击屏幕 Swift

Detect that user tap on screen Swift

提问by Jacob233

i want to remove UIVIewfrom screen after user tap something except that view. (to visualize it for you I will upload sketch of my view)[

我想UIVIew在用户点击除该视图之外的其他内容后从屏幕上删除。（为了给你形象化，我会上传我的视图草图）[

]1

] 1

And I want to remove blueUIviewafter user tap on something except buttons in this view. What should I use?

我想UIview在用户点击此视图中除按钮之外的其他内容后删除蓝色。我应该使用什么？

EDIT: In blue UIVIeware two buttons and I want to remove that view when user tap on background image

编辑：蓝色UIVIew是两个按钮，我想在用户点击背景图像时删除该视图

I did what "yerpy" told me to do but it isn't working.

我做了“yerpy”告诉我要做的事情，但它不起作用。

func test(gestureRecognizer: UITapGestureRecognizer) {
    print("test")
}

func setUpBackgroundImageView() {
    self.view.addSubview(backgroundImageView)
    backgroundImageView.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
    backgroundImageView.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true
    backgroundImageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
    backgroundImageView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
    let tap = UITapGestureRecognizer(target: self, action: #selector(test(gestureRecognizer:)))
    backgroundImageView.addGestureRecognizer(tap)
    tap.delegate = self
}

And I also addshouldReceiveTouchfunction to UIGestureRecognizerDelegate. What am I doing wrong?

我还将shouldReceiveTouch功能添加到UIGestureRecognizerDelegate. 我究竟做错了什么？

回答by yerpy

Add UIGestureRecognizerto the super view:

添加UIGestureRecognizer到super view：

As you said you have image view as a background.

正如你所说，你有图像视图作为背景。

 let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapped(gestureRecognizer:)))
        imageView.addGestureRecognizer(tapRecognizer)
        tapRecognizer.delegate = self

Adding target action :

添加目标操作：

func tapped(gestureRecognizer: UITapGestureRecognizer) {
       // Remove the blue view.
    }

And then inside UITapGestureRecognizerDelegate:

然后在里面UITapGestureRecognizerDelegate：

extension ViewController : UIGestureRecognizerDelegate {
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        if touch.view!.superview!.superclass! .isSubclass(of: UIButton.self) {
            return false
        }
        return true
    }
}

Hope it helps !

希望能帮助到你 ！

EDIT

编辑

Make sure that user can touch on the viewby enabling : self.view.userInteractionEnabled = true

确保用户可以view通过启用来触摸：self.view.userInteractionEnabled = true

回答by Abdelahad Darwish

you can use UITapGestureRecognizer for that view

您可以为该视图使用 UITapGestureRecognizer

   override func viewDidLoad() {
        super.viewDidLoad()

        // Add "tap" press gesture recognizer
        let tap = UITapGestureRecognizer(target: self, action: #selector(tapHandler))
        tap.numberOfTapsRequired = 1
        backgroundimage.addGestureRecognizer(tap)
    }

    // called by gesture recognizer
    func tapHandler(gesture: UITapGestureRecognizer) {

        // handle touch down and touch up events separately
        if gesture.state == .began {

        } else if  gesture.state == .ended {

        }
    }

回答by Turtleeeeee

You can

你可以

1. subclass with that background view, and implement an inherited method -beganTouches:(there is another para but I forget what it is)
2. Add a UITapGestureRecognizer to that view

1. 具有该背景视图的子类，并实现继承的方法 -beganTouches:(there is another para but I forget what it is)
2. 向该视图添加一个 UITapGestureRecognizer

回答by alegelos

1- Add a view below your view, let call it overlay (gray one)

1- 在您的视图下方添加一个视图，称之为叠加（灰色）

2- Add your container view with all your buttons inside (green one)

2- 添加包含所有按钮的容器视图（绿色按钮）

3- Add a tap gesture to the overlay (drag tap to overlay view)

3- 向覆盖添加点击手势（拖动点击以覆盖视图）

4- Create a @IBAction of the tap to the viewcontroller

4- 为视图控制器创建一个@IBAction 的点击

5- Write code to hide your green view inside the @IBAction

5- 编写代码将您的绿色视图隐藏在@IBAction 中

Image

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Image

图片