在许多场景中responseToSwipeGesture

Question

我试图向从主场景继承的场景添加滑动手势（GameScene）

extension GameScene {

    class Scene1: GameScene {

        override func didMove(to view: SKView) {

            let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeRight.direction = .right
            view.addGestureRecognizer(swipeRight)

            let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeDown.direction = UISwipeGestureRecognizerDirection.down
            view.addGestureRecognizer(swipeDown)

            let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeUp.direction = UISwipeGestureRecognizerDirection.up
            view.addGestureRecognizer(swipeUp)

            let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeLeft.direction = UISwipeGestureRecognizerDirection.left
            view.addGestureRecognizer(swipeLeft)
        }
    }
    class Scene2: GameScene {

        override func didMove(to view: SKView) {

            let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeRight.direction = .right
            view.addGestureRecognizer(swipeRight)

            let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeDown.direction = UISwipeGestureRecognizerDirection.down
            view.addGestureRecognizer(swipeDown)

            let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeUp.direction = UISwipeGestureRecognizerDirection.up
            view.addGestureRecognizer(swipeUp)

            let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(self.respondToSwipeGesture))
            swipeLeft.direction = UISwipeGestureRecognizerDirection.left
            view.addGestureRecognizer(swipeLeft)
        }
    }
}

每次我必须在所有场景中再次编写此代码。也许，还有另外一条出路。

Answer 1

是的，如果您阅读了代码，您将看到您从未向场景添加手势，而是将其添加到视图中。现在问问自己，你有什么其他对象可以访问视图？答案是视图控制器。这是您要放置手势代码的位置。