ios - 一次检测多个触摸(Swift)

Question

我正在使用 Xcode 7、Swift 和 SpriteKit，并且我尝试允许用户在我的应用程序中同时使用两根手指。

基本上，我的屏幕有两半，我希望每一侧都有单独的触摸识别，并且同时。

下面是我当前的代码:

    override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?)
    {
        guard let touch = touches.first else {
            return;
        }
        let location = touch.locationInNode(self)
        let touchedNode = self.nodeAtPoint(location)
        if (touchedNode == touch1){
            //code1
        }
        else if (touchedNode == touch2){
            //code2
        }
    }

touch1 和 touch2 是 SkSpriteNode，分别占据屏幕的不同一半。
只要您一次只有 1 个手指在屏幕上，此代码就可以正常工作。
然而，如果有两个(每半个)，则首先放置在屏幕上的那个就是注册的。

如何才能使两者都被注册，从而运行 code1 和 code2？

Answer 1

你需要multipleTouchEnabled属性设置为 true。来自关于此属性的文档:

When set to YES, the receiver receives all touches associated with a multi-touch sequence. When set to NO, the receiver receives only the first touch event in a multi-touch sequence. The default value of this property is NO.

编辑:

根据您的评论，您可以尝试这样做(使 Sprite 响应触摸):

class Button:SKSpriteNode {

    init(size:CGSize, color:SKColor) {

        super.init(texture: nil, color: color, size: size)

        userInteractionEnabled = true
    }

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

        if let name = self.name {
            print("Button with \(name) pressed")
        }
    }

    override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if let name = self.name {
            print("Button with \(name) pressed")
        }
    }

    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if let name = self.name {
            print("Button with \(name) released")
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}

class GameScene: SKScene, SKPhysicsContactDelegate {

    override func didMoveToView(view: SKView) {

        let left = Button(size: CGSize(width: frame.size.width/2.0, height: frame.size.height), color: .blackColor())
        left.name = "left"
        left.position = CGPoint(x: left.size.width/2.0, y: frame.midY)

        let right = Button(size: CGSize(width: frame.size.width/2.0, height: frame.size.height), color: .whiteColor())
        right.name = "right"
        right.position = CGPoint(x:frame.maxX-right.size.width/2.0, y: frame.midY)

        addChild(left)
        addChild(right)

    }
}