Ios Swift-当移动到另一个场景时，如何从场景中删除滑动手势？

因此，我的游戏使用滑动手势，在didMoveToView（）函数中，我初始化了这些手势：

            let swipeRight = UISwipeGestureRecognizer()
            swipeRight.direction = UISwipeGestureRecognizerDirection.Right
            self.view?.addGestureRecognizer(swipeRight)

            let swipeLeft = UISwipeGestureRecognizer()
            swipeLeft.direction = UISwipeGestureRecognizerDirection.Left
            self.view?.addGestureRecognizer(swipeLeft)

            let swipeUp = UISwipeGestureRecognizer()
            swipeUp.direction = UISwipeGestureRecognizerDirection.Up
            self.view?.addGestureRecognizer(swipeUp)

            let swipeDown = UISwipeGestureRecognizer()
            swipeDown.direction = UISwipeGestureRecognizerDirection.Down
            self.view?.addGestureRecognizer(swipeDown)

问题是当我移动到GameOver场景时，我刷卡，它会使我的应用程序崩溃。我注意到有人贴了类似的东西，并得到了这个答案

override func willMoveFromView(view: SKView) {
   for recognizer in self.view.gestureRecognizers! {
       self.view.removeGestureRecognizer(recognizer)
   }
}

---

在切换到游戏结束之前，仍然不太确定如何实现这一点和/或从场景中删除手势。有人能帮忙吗？

您正在删除各种手势，请尝试以下操作：

if([recognizer isKindOfClass:[UISwipeGestureRecognizer class]]) {
    [self removeGestureRecognizer:recognizer];
}

---

希望这有帮助：）

以下操作将从视图中删除所有滑动手势识别器：

override func willMoveFromView(view: SKView) {
    if let gestures = view.gestureRecognizers {
        for gesture in gestures {
           if let recognizer = gesture as? UISwipeGestureRecognizer {
                view.removeGestureRecognizer(recognizer)
           }
        }
    }
}

---

如果要删除

UIGestureRecognizer

，请将其替换为

UIWipeGestureRecognizer

extension SKView {
    func removeAllGestureRecognizers() {
        if let objects = gestureRecognizers {
            for object in objects {
                if let gestureRecognizer = object as? UIGestureRecognizer {
                    removeGestureRecognizer(gestureRecognizer)
                }
            }
        }
    }
}

---

这对我没用！！！。每次view.gestureerecognizers都给出nil。@pinturaj但您确定已将该手势添加到视图中吗？将手势添加到视图时，该手势将自动添加到视图的

手势识别器

属性（数组）中。即使删除了所有手势，

手势识别器

也会引用一个空数组（不是零）。