滑动手势识别器仅在SKScene中间歇性工作

Question

我有一个SKScene，其中有几个滑动手势识别器，但滑动手势很少被识别，我不知道为什么。这里是我的代码：

class MyScene: SKScene 
{ 
weak var member: MySceneDelegate? 
var selectedNode = SKSpriteNode() 
var backgroundSprite: MovingBackground! 
var myEmitter = SKEmitterNode() 
var goingUp: Bool = true 
var work: Int = 0 
var i = 0.0 
var decal: SKSpriteNode! 
var startYPosition = 690 //460 is halfway 
var myTimer: Timer! 
var yStart: CGFloat = 0.0 
var count = 0 
var currentVal = 1 
var startTime = Date() 
var xAxisLabelDisplayIncrement = 60.0 
var interval = 5.0 
var intervalCounter = 0.0 
var swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(MyScene.swipe(_:))) 
var swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(MyScene.swipe(_:))) 

override func didMove(to view: SKView) 
{ 
    //self.view?.isUserInteractionEnabled = true 
    let gestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(MyScene.handlePanFrom(_:))) 
    self.view!.addGestureRecognizer(gestureRecognizer) 
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(MyScene.handleTap(_:))) 
    self.view!.addGestureRecognizer(tapGestureRecognizer) 
    swipeRight.addTarget(self, action: #selector(MyScene.swipe(_:))) 
    swipeRight.direction = UISwipeGestureRecognizerDirection.right 
    swipeRight.numberOfTouchesRequired = 1 
    self.view!.addGestureRecognizer(swipeRight) 

    swipeLeft.addTarget(self, action: #selector(MyScene.swipe(_:))) 
    swipeLeft.direction = UISwipeGestureRecognizerDirection.left 
    swipeLeft.numberOfTouchesRequired = 1 
    self.view!.addGestureRecognizer(swipeLeft) 
} 
func swipe(_ sender: UISwipeGestureRecognizer) 
{ 
    print("swiped") 
    member?.swipe(direction: sender.direction) 
} 
} 

显然有些代码已被省略，以保持这篇文章的重点和易于理解。有趣的是，我有时会使用滑动功能来调用，但大多数情况下它不会打印“滑动”或调用成员？.swipe。你可以给我的任何帮助都会很棒。感谢您考虑这件事。

真诚，
肖恩

Answer 1

它是不是没有工作的代码示例。这是什么情况下是显而易见的。

您可能在另一个视图中启动了您想要的视图之外的滑动操作，并以您打算的视图结束。

见这种情况下我的回答&样本项目：UISwipeGestureRecognizer doesn't recognize swipe gesture initiated outside the view

如果您有其他元素“吃”的UITouch ES，比如按钮或启用了互动等意见，解释它。

如果你想调试，尝试添加一个UITapGestureRecognizer到您的视图，然后使用

let location = sender.location(ofTouch: 0, in: mysubview) 

您的子视图，看看它在视图中的边界。