swift – 如何识别所有4个方向的滑动
发布时间:2020-12-14 06:11:32 所属栏目:百科 来源:网络整理
导读: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
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 } } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |