ios - 根据触摸事件旋转对象

Question

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Answer 1

Wm.p1us 说的是对的，这里是他建议的代码。

   var myImage: SKSpriteNode!

   class GameScene: SKScene {
        override func didMoveToView(view: SKView) {

            anchorPoint = CGPointMake(0.5, 0.5)

            myImage = SKSpriteNode(imageNamed: "myImage")
            addChild(myImage)

   }

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

            let touch = touches.first as UITouch!
            let location = touch.locationInView(self.view)

            myImage.removeAllActions()

            if location.x < frame.size.width/2 {
                // left hand side touched, rotate left

                let rotateLeft = SKAction.rotateByAngle(CGFloat(M_PI)*2, duration: 1)
                myImage.runAction(SKAction.repeatActionForever(rotateLeft))

            } else {
               // right hand side touched, rotate right

                let rotateRight = SKAction.rotateByAngle(-CGFloat(M_PI)*2, duration: 1)
                myImage.runAction(SKAction.repeatActionForever(rotateRight))

            }

        }
    }