swift – 如何识别所有4个方向的滑动

概述我需要使用滑动来识别滑动手势，然后向右。但在swift UISwipeGestureRecognizer具有预定的右方向..我不知道如何使这个使用其他方向.. 您需要为每个方向有一个UISwipeGestureRecognizer。这有点怪异，因为UISwipeGestureRecognizer.direction属性是一个选项样式的位掩码，但每个识别器只能处理一个方向。你可以将它们全部发送到同一 我需要使用滑动来识别滑动手势，然后向右。但在swift UISwipeGestureRecognizer具有预定的右方向..我不知道如何使这个使用其他方向.. 您需要为每个方向有一个UISwipeGestureRecognizer。这有点怪异，因为UISwipeGestureRecognizer.direction属性是一个选项样式的位掩码，但每个识别器只能处理一个方向。你可以将它们全部发送到同一个处理程序，如果你想，并将其排序，或发送到不同的处理程序。这里有一个实现：

overrIDe func vIEwDIDLoad() {    super.vIEwDIDLoad()    var swipeRight = UISwipeGestureRecognizer(target: self,action: "respondToSwipeGesture:")    swipeRight.direction = UISwipeGestureRecognizerDirection.Right    self.vIEw.addGestureRecognizer(swipeRight)    var swipeDown = UISwipeGestureRecognizer(target: self,action: "respondToSwipeGesture:")    swipeDown.direction = UISwipeGestureRecognizerDirection.Down    self.vIEw.addGestureRecognizer(swipeDown)}func respondToSwipeGesture(gesture: UIGestureRecognizer) {    if let swipeGesture = gesture as? UISwipeGestureRecognizer {        switch swipeGesture.direction {            case UISwipeGestureRecognizerDirection.Right:                print("Swiped right")            case UISwipeGestureRecognizerDirection.Down:                print("Swiped down")            case UISwipeGestureRecognizerDirection.left:                print("Swiped left")            case UISwipeGestureRecognizerDirection.Up:                print("Swiped up")            default:                break        }    }}

Swift 3：

overrIDe func vIEwDIDLoad() {    super.vIEwDIDLoad()    let swipeRight = UISwipeGestureRecognizer(target: self,action: #selector(self.respondToSwipeGesture))    swipeRight.direction = UISwipeGestureRecognizerDirection.right    self.vIEw.addGestureRecognizer(swipeRight)    let swipeDown = UISwipeGestureRecognizer(target: self,action: #selector(self.respondToSwipeGesture))    swipeDown.direction = UISwipeGestureRecognizerDirection.down    self.vIEw.addGestureRecognizer(swipeDown)}func respondToSwipeGesture(gesture: UIGestureRecognizer) {    if let swipeGesture = gesture as? UISwipeGestureRecognizer {        switch swipeGesture.direction {        case UISwipeGestureRecognizerDirection.right:            print("Swiped right")        case UISwipeGestureRecognizerDirection.down:            print("Swiped down")        case UISwipeGestureRecognizerDirection.left:            print("Swiped left")        case UISwipeGestureRecognizerDirection.up:            print("Swiped up")        default:            break        }    }}

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