如何知道何时按下和取消按钮 [英] How to know when the button is pressed and canceled Button pressing

问题描述

我做了一个按钮.并使用下面的代码. 但这根本不起作用.

I made a button. And used the below code. But it doesn't work at all.

override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
    print("pressTest")
    btnConvert.isHidden = true
}

我怎么知道何时按下按钮以及何时取消按下按钮?

How can I know when the button is pressed and when button pressing is canceled?

推荐答案

使用内置的UIButton函数-.touchDown，.touchUpInside，.touchUpOutside.

Use the built-in UIButton functions - .touchDown, .touchUpInside, .touchUpOutside.

触摸开始:

myButton.addTarget(target, action: action, for: .touchDown)

触摸结束:

myButton.addTarget(target, action: action, for: .touchUpInside)
myButton.addTarget(target, action: action, for: .touchUpOutside)

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