分别检测两个触摸并同时处理它们

Question

我有两个SKSpriteKitNodes，一个在左边，一个在右边。然后我检测触摸位置的位置，并根据其位置进行动作（左侧射击，右侧加速）。但问题是，如果触摸左侧，我怎样才能同时处理右侧触摸？

到目前为止我的代码：

let left = SKSpriteNode()
let right = SKSpriteNode()

override func didMoveToView(view: SKView) {

    left.size = CGSize(width: frame.width / 2, height: frame.height)
    right.size = CGSize(width: frame.width / 2, height: frame.height)

    left.position = CGPoint(x: frame.width / 4, y: frame.height / 2)
    right.position = CGPoint(x: 3 * frame.width / 4, y: frame.height / 2)

}



override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    for touch in touches{
        let location = touch.locationInNode(self)

        if right.containsPoint(location){
            //HANDLE THE SPEED

            if speed == 0{
                speed = 5
            }
            shouldBreak = false
        }
        if left.containsPoint(location){
            //HANDLE THE SHOOTING
            shoot.position = CGPoint(x: frame.midX, y: frame.height * 0.2)
            isShooting = true
        }


    }