Ios 如何从长按开始检测抽头？

我想检测3个动作，“点击开始”，“长按开始”，“长按结束”。我想检测“点击开始”，无论检测长点击（即每次触摸屏幕时，检测“点击开始”），并检测“点击开始”，然后检测“长按开始”，以防继续触摸

只有在未检测到“长抽头”的情况下，以下代码才能检测到“抽头开始”

    let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.Long(_:)))
    longPressGesture.minimumPressDuration = 3  
    longPressGesture.allowableMovement = 30    

    let shortPressGesture = UITapGestureRecognizer(target: self, action: #selector(self.Tap(_:)))

    touchView.addGestureRecognizer(shortPressGesture)
    touchView.addGestureRecognizer(longPressGesture)

}

@objc func Long(_ sender: UILongPressGestureRecognizer) {
    if(sender.state == UIGestureRecognizer.State.began) {
    print("Long tap begin")
    } else if (sender.state == UIGestureRecognizer.State.ended) {
    print("Long tap ended")
    }
}

@objc func Tap(_ sender: UITapGestureRecognizer) {
    print("Tap begin")
}

---

您需要遵守

UIgestureRecognitizerDelegate

class ViewController: UIViewController, UIGestureRecognizerDelegate

然后使用功能同时执行

should recognize，以允许两个手势识别器同时工作

此外，我认为您实际上想要使用两个UILongPressGetSutureRecogeners，因为在润色时会检测到轻触

  @objc func Long(_ sender: UILongPressGestureRecognizer) {
    if(sender.state == UIGestureRecognizer.State.began) {
      print("Long tap begin")
    } else if (sender.state == UIGestureRecognizer.State.ended) {
      print("Long tap ended")
    }
  }

  @objc func Tap(_ sender: UILongPressGestureRecognizer) {
    if(sender.state == UIGestureRecognizer.State.began) {
      print("Tap begin")
    } else if (sender.state == UIGestureRecognizer.State.ended) {
      print("Tap ended")
    }
  }

  func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    if gestureRecognizer == longPressGesture && otherGestureRecognizer == shortPressGesture {
      return true
    }
    return false
  }

最后，不要忘记将手势识别器的代理设置为self

tapPressGesture.delegate = self
shortPressGesture.delegate = self

你不能在印刷时启动计时器，在发行时评估它吗？