ios – 使用Pinch Gesture调整Sprite Kit节点的大小

我正在尝试实现捏手势识别器来调整我的精灵节点的大小.我正在使用setScale(sender.scalE)来做到这一点,但每次我抬起手指并尝试再次捏时,我的精灵重置为1.0比例,然后再缩放到捏. @H_404_7@

@H_404_7@我想要的是当我重新捏住屏幕时,精灵尺寸保持原样,并且随着我的捏缩而变得越来越大,因此我可以继续捏捏以使其变得像它一样大或小能够.这该怎么做？

@H_404_7@这是我的代码.

@H_404_7@

var pizza = PizzaSprite()

override func didMove(to view: SKView) {

    let pinchGesture = UIPinchGestureRecognizer(target: self,action: #SELEctor(self.handlePinchFrom(_:)))

    pizza = PizzaSprite(size: self.frame.width * 0.25)

    self.addChild(pizza)

    self.view?.addGestureRecognizer(pinchGesturE)

}

func handlePinchFrom(_ sender: UIPinchGestureRecognizer) {

    if sender.state == .began {

    } else if sender.state == .changed {

        pizza.setScale(sender.scalE)

    } else if sender.state == .ended {

    }

}

@H_404_7@这是PizzaSprite类

@H_404_7@

init() {
    let texture = SKTexture(imagenamed: "demPizza")
    super.init(texture: texture,color: UIColor.clear,size: texture.size())
}

init(size: CGFloat) {
    let texture = SKTexture(imagenamed: "demPizza")
    super.init(texture: texture,size: CGSize(width: size,height: sizE))
}


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

func handlePinchFrom(_ sender: UIPinchGestureRecognizer) {

    let pinch = SKAction.scale(by: sender.scale,duration: 0.0)

    pizza.run(pinch)
    sender.scale = 1.0

}