拖动SKNode而不触摸它(Drag and drop SKNode without touching it)

 我在SpriteKit上有一个SKNode，我基本上希望能够在屏幕上拖动，但不必触摸它！ 想象一下，我在任何地方按屏幕。 然后我希望我的SKNode与我的手指保持距离，这样当我拖动它时我就能看到它。 
 
 我有这个工作，但对象抓住了触摸。 
 
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches{
        let location = touch.locationInNode(self)

        circle.position = location


    }
}


override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches{
        let location = touch.locationInNode(self)

        circle.position = location

    }
}

I have an SKNode on SpriteKit, which I basically want to be able to drag around the screen, but without having to touch it! Imagine I press the screen anywhere. I then want my SKNode to keep its distance to my finger, so that when I drag it I can see it.
 
I have this working but the object snaps to the touch.
 
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches{
        let location = touch.locationInNode(self)

        circle.position = location


    }
}


override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches{
        let location = touch.locationInNode(self)

        circle.position = location

    }
}

原文：https://stackoverflow.com/questions/37082789