Question

我正在使用SpriteKit + Swift制作简单的Pong游戏。我只能一次移动每个球拍，只有一根手指在显示屏上。我已经看到了其他相关的问题，但他们没有帮助我。我的代码：

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    let touch = touches.first as UITouch?
    let touchLocation = touch?.locationInNode(self)
    let body: SKPhysicsBody? = self.physicsWorld.bodyAtPoint(touchLocation!)

    if body?.node!.name == PaddleCategoryName {
        print("Paddle Touched!")
        fingerIsOnPaddle = true
    }

    if body?.node!.name == PaddleCategoryName2 {
        print("Paddle2 Touched!")
        fingerIsOnPaddle2 = true
    }


}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    if fingerIsOnPaddle {
        let touch = touches.first as UITouch?
        let touchLocation = touch?.locationInNode(self)
        let previousTouchLocation = touch?.previousLocationInNode(self)

        let paddle = self.childNodeWithName(PaddleCategoryName) as! SKSpriteNode

        var newYPosition = paddle.position.y + (touchLocation!.y - previousTouchLocation!.y)

        newYPosition = max(paddle.size.height / 2, newYPosition)
        newYPosition = min(self.size.height - paddle.size.height / 2, newYPosition)

        paddle.position = CGPointMake(paddle.position.x, newYPosition)

    }

    if fingerIsOnPaddle2 {
        let touch = touches.first as UITouch?
        let touchLocation = touch?.locationInNode(self)
        let previousTouchLocation = touch?.previousLocationInNode(self)

        let paddle2 = self.childNodeWithName(PaddleCategoryName2) as! SKSpriteNode

        var newYPosition = paddle2.position.y + (touchLocation!.y - previousTouchLocation!.y)

        newYPosition = max(paddle2.size.height / 2, newYPosition)
        newYPosition = min(self.size.height - paddle2.size.height / 2, newYPosition)

        paddle2.position = CGPointMake(paddle2.position.x, newYPosition)
    }
}

override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    fingerIsOnPaddle = false
    fingerIsOnPaddle2 = false
}

Answer 1

我知道这有点晚了，但我想我会尝试减少将来任何人的麻烦。

我这样做的方法是首先删除

let touch = touches.first as UITouch?

然后将整个touchesMoved函数放在这段代码中：

for touch in touches
{

}

您现在可以像使用原始触控一样使用触控，但会实现多点触控。

SpriteKit + Swift中的多点触摸手势识别

1 个答案: