Question

我想在用户点击除该视图之外的其他内容时从屏幕中删除UIVIew。（为你想象它我会上传我的观点草图）[

enter image description here ] 1

我想在用户点击此视图中的按钮以外的内容时删除蓝色UIview。我该怎么用？

编辑：蓝色UIVIew是两个按钮，我想在用户点击背景图片时删除该视图

我做了“yerpy”告诉我要做的事，但它没有用。

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
}

我还将shouldReceiveTouch函数添加到UIGestureRecognizerDelegate。我做错了什么？

Answer 1

将UIGestureRecognizer添加到super view：

正如您所说，您将图像视图作为背景。

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

添加目标操作：

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

然后在UITapGestureRecognizerDelegate内：

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

希望它有所帮助！

修改

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

Answer 2

您可以将UITapGestureRecognizer用于该视图

   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 {

        }
    }

Answer 3

你可以

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)
向该视图添加UITapGestureRecognizer

Answer 4

1-在视图下方添加视图，将其称为叠加（灰色）

2-添加所有按钮的容器视图（绿色）

3-向叠加层添加点按手势（拖动点按以覆盖视图）

4-创建tap对视图控制器的@IBAction

5-编写代码以隐藏@IBAction中的绿色视图

Image

Answer 5

在所有按钮下添加一个覆盖整个屏幕的巨型按钮。每当用户按下较小按钮下方的巨型按钮时，就可以按照自己的意愿进行操作。

不是最优雅，但可以使用：P

检测用户点击屏幕Swift

5 个答案: