Question

我想通过以下方式自定义长按手势识别器：

1）当我按住一个物体0.5秒时，物体变暗，然后 2）当我继续按住对象一秒钟（总共1.5秒）时，会发生一些动作（例如对象消失）。

基本上，通过按住对象至少1.5秒，两个动作分别在两个时间发生。我也有一个轻敲手势识别器，可能会影响事物。

Answer 1

请参阅Reinier's solution，因为它是正确的。这个增加了延迟以满足require(toFail:)

您可以使用属性minimumPressDuration设置时间（以秒为单位，默认值为0.5）

let quickActionPress = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.zeroFiveSecondPress(gesture:))) // 0.5 seconds by default
let laterActionPress = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.oneFiveSecondPress(gesture:)))
laterActionPress.minimumPressDuration = 1.5

someView.addGestureRecognizer(quickActionPress)
someView.addGestureRecognizer(laterActionPress)

// If 1.5 detected, only execute that one
quickActionPress.require(toFail: laterActionPress)

@objc func zeroFiveSecondPress(gesture: UIGestureRecognizer) {
    // Do something
    print("0.5 press")
}

@objc func oneFiveSecondPress(gesture: UIGestureRecognizer) {
    zeroFiveSecondPress(gesture: gesture)
    // Do something else
    print("1.5 press")
}

Answer 2

来自@nathan的答案基本上很好，但缺少一个细节，你需要实现UIGestureRecognizerDelegate以允许两个手势同时工作，所以这是我的代码

class ViewController: UIViewController, UIGestureRecognizerDelegate{   

    override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    //this for .5 time
    let firstGesture = UILongPressGestureRecognizer(target: self, action: #selector(firstMethod))
    //this for 1.5
    let secondGesture = UILongPressGestureRecognizer(target: self, action: #selector(secondMethod))
    secondGesture.minimumPressDuration = 1.5
    firstGesture.delegate = self
    secondGesture.delegate = self
    self.view.addGestureRecognizer(firstGesture)
    self.view.addGestureRecognizer(secondGesture)

}

func firstMethod() {
    debugPrint("short")
}

func secondMethod() {
    debugPrint("long")
}

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool{
    return true
}
}

希望这个帮助

自定义长按手势识别器

2 个答案: