控制器中的 UIView 触摸事件 [英] UIView touch event in controller

问题描述

如何以编程方式添加 UIView touchbegin 动作或 touchend 动作，因为 Xcode 未从 Main.storyboard 提供?

How can I add UIView touchbegin action or touchend action programmatically as Xcode is not providing from Main.storyboard?

推荐答案

您必须通过代码添加它.试试这个:

You will have to add it through code. Try this:

    // 1.create UIView programmetically
    var myView = UIView(frame: CGRectMake(100, 100, 100, 100))
    // 2.add myView to UIView hierarchy
    self.view.addSubview(myView) 
    // 3. add action to myView
    let gesture = UITapGestureRecognizer(target: self, action: "someAction:")
    // or for swift 2 +
    let gestureSwift2AndHigher = UITapGestureRecognizer(target: self, action:  #selector (self.someAction (_:)))
    self.myView.addGestureRecognizer(gesture)

    func someAction(sender:UITapGestureRecognizer){     
       // do other task
    }

    // or for Swift 3
    func someAction(_ sender:UITapGestureRecognizer){     
       // do other task
    }

    // or for Swift 4
    @objc func someAction(_ sender:UITapGestureRecognizer){     
       // do other task
    }

    // update for Swift UI

    Text("Tap me!")
        .tapAction {
             print("Tapped!")
        }

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