我试图让UISwipeGestureRecognizer在Swift 3中工作，默认滑动右边工作正常但不向上或向左。
我通过控制拖动Action来尝试它
@IBAction func hole(_ recognizer: UISwipeGestureRecognizer) {
if (recognizer.direction == UISwipeGestureRecognizerDirection.left)
{
print("left")
}else if recognizer.direction == .right {
print("right")
}else {
print("other")
}
}
而且，在ViewDidLoad中
//gesture recognisers let swipeRight = UISwipeGestureRecognizer(target: self,action: "holeSwiped:") swipeRight.direction = UISwipeGestureRecognizerDirection.right self.view.addGestureRecognizer(swipeRight) let swipeLeft = UISwipeGestureRecognizer(target: self,action: "holeSwiped:") swipeLeft.direction = UISwipeGestureRecognizerDirection.left self.view.addGestureRecognizer(swipeLeft)
我的方法
func holeSwiped(gesture: UISwipeGestureRecognizer)
{
if let swipeGesture = gesture as? UISwipeGestureRecognizer{
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.right:
print("right swipe")
case UISwipeGestureRecognizerDirection.left:
print("left swipe")
default:
print("other swipe")
}
}
}
现在，除默认权限外，没有任何滑动工作正在进行。有任何想法吗？
第1步：在viewDidLoad()方法中添加滑动手势。
override func viewDidLoad() {
super.viewDidLoad()
let swipeLeft = UISwipeGestureRecognizer(target: self,action: #selector(handleGesture))
swipeLeft.direction = .left
self.view.addGestureRecognizer(swipeLeft)
let swipeRight = UISwipeGestureRecognizer(target: self,action: #selector(handleGesture))
swipeRight.direction = .right
self.view.addGestureRecognizer(swipeRight)
let swipeUp = UISwipeGestureRecognizer(target: self,action: #selector(handleGesture))
swipeUp.direction = .up
self.view.addGestureRecognizer(swipeUp)
let swipeDown = UISwipeGestureRecognizer(target: self,action: #selector(handleGesture))
swipeDown.direction = .down
self.view.addGestureRecognizer(swipeDown)
}
第2步：检查handleGesture()方法中的手势检测
func handleGesture(gesture: UISwipeGestureRecognizer) -> Void {
if gesture.direction == UISwipeGestureRecognizerDirection.right {
print("Swipe Right")
}
else if gesture.direction == UISwipeGestureRecognizerDirection.left {
print("Swipe Left")
}
else if gesture.direction == UISwipeGestureRecognizerDirection.up {
print("Swipe Up")
}
else if gesture.direction == UISwipeGestureRecognizerDirection.down {
print("Swipe Down")
}
}
我希望这会对某人有所帮助。