Swift - 如何在移动到另一个场景时从场景中删除滑动手势？

Question

所以我的游戏使用滑动手势，在我的 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)

问题是当我移动到我的 GameOver 场景并滑动时，我的应用程序崩溃了。我注意到有人发布了类似的内容并将其作为答案

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

仍然不太确定如何实现这个 and/or 在切换到游戏结束之前从场景中删除手势。有人可以帮忙吗？

Answer 1

你正在删除所有类型的手势，试试这个：

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

希望这对您有所帮助..:)

Answer 2

以下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)
           }
        }
    }
}

Answer 3

如果您要删除 UIGestureRecognizer，请将 UIGestureRecognizer 替换为 UISwipeGestureRecognizer。

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