Question

我想在button click和button long click上触发两项操作。我在界面构建器中添加了UIbutton。如何使用IBAction触发两个操作？有人可以告诉我如何存档吗？

这是我用于点击按钮的代码

@IBAction func buttonPressed (sender: UIButton) { .... }

我可以使用这种方法，还是必须使用其他方法进行长时间点击？

Answer 1

如果您想单击一下即可执行任何操作并长按，您可以通过以下方式添加手势：

@IBOutlet weak var btn: UIButton!

override func viewDidLoad() {

    let tapGesture = UITapGestureRecognizer(target: self, #selector (tap))  //Tap function will call when user tap on button
    let longGesture = UILongPressGestureRecognizer(target: self, #selector(long))  //Long function will call when user long press on button.
    tapGesture.numberOfTapsRequired = 1
    btn.addGestureRecognizer(tapGesture)
    btn.addGestureRecognizer(longGesture)
}

@objc func tap() {

    print("Tap happend")
}

@objc func long() {

    print("Long press")
}

通过这种方式，您可以为单个按钮添加多个方法，您只需要为该按钮选择Outlet ..

Answer 2

@IBOutlet weak var countButton: UIButton!
override func viewDidLoad() {
    super.viewDidLoad()

    addLongPressGesture()
}
@IBAction func countAction(_ sender: UIButton) {
    print("Single Tap")
}

@objc func longPress(gesture: UILongPressGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began {
        print("Long Press")
    }
}

func addLongPressGesture(){
    let longPress = UILongPressGestureRecognizer(target: self, action: #selector(longPress(gesture:)))
    longPress.minimumPressDuration = 1.5
    self.countButton.addGestureRecognizer(longPress)
}

Answer 3

为什么不创建自定义UIButton类，创建协议并让按钮将信息发送回委托。像这样：

    //create your button using a factory (it'll be easier of course)
    //For example you could have a variable in the custom class to have a unique identifier, or just use the tag property)

    func createButtonWithInfo(buttonInfo: [String: Any]) -> CustomUIButton {
        let button = UIButton(type: .custom)
        button.tapDelegate = self
        /*
Add gesture recognizers to the button as well as any other info in the buttonInfo

*/
        return button
    }

    func buttonDelegateReceivedTapGestureRecognizerFrom(button: CustomUIButton){
        //Whatever you want to do
    }

UIButton的单按和长按事件很快

3 个答案: