Ios 使用SKAction.Scale更改精灵的比例

尝试让精灵“PlayButton”的比例继续上下缩放，以提示用户触摸它。似乎无法让它工作

这是菜单类：

import SpriteKit

class MenuScene: SKScene {

let ScalePBup = SKAction.scaleX(to: 300, y: 300, duration: 10)
let ScalePBdown = SKAction.scaleX(to: -300, y: -300, duration: 10)

//MARK: - Private Instance Variables
private let logo = GameLogo()
private let title = GameTitle()
private let playButton = PlayButton()
private let background = Background()
private let foreground = Foreground()
private let background2 = Background2()

//MARK: - Init
required init ?(coder aDecoder: NSCoder){
    super.init(coder:aDecoder)
}
override init(size: CGSize){
    super.init(size: size)
}
override func didMove(to view: SKView){
    self.setup()
}
//MARK: - Setup
private func setup() {

    self.backgroundColor = Colors.colorFromRGB(rgbvalue: Colors.background)
    self.addChild(logo)
    self.addChild(title)
    self.addChild(playButton)
    self.addChild(background)
    self.addChild(foreground)
    self.addChild(background2)        
}

// MARK: - Update
override func update(_ currentTime: TimeInterval) {}
// MARK: - Touch Handling
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch:UITouch = touches.first! as UITouch
    let touchLocation = touch.location(in: self)
    if playButton.contains(touchLocation){
        loadScene()
    }
}

// MARK: - Load Scene
private func loadScene() {
    let scene = GameScene(size: kViewSize)
    let transition = SKTransition.fade(with: SKColor.black, duration: 0.5)
    self.view?.presentScene(scene, transition: transition)
    run(SKAction.repeatForever(SKAction.sequence([
        SKAction.run(ScalePBup, onChildWithName: "playButton"),
        SKAction.run(ScalePBdown, onChildWithName: "playButton")
        ])
    ))
}
}

---

如果你有任何建议，请告诉我！谢谢

在菜单中删除代码：

run(SKAction.repeatForever(SKAction.sequence([
        SKAction.run(ScalePBup, onChildWithName: "playButton"),
        SKAction.run(ScalePBdown, onChildWithName: "playButton")
        ])
    ))

在类播放按钮中添加：

let ScalePBup = SKAction.scaleX(to: 300, y: 300, duration: 10)
let ScalePBdown = SKAction.scaleX(to: -300, y: -300, duration: 10)

func startPulse() {
    run(SKAction.repeatForever(SKAction.sequence([ScalePBup,ScalePBdown])))
}

func removePulse () {
    removeAllAction()
}

在MenuScene中

override func didMove(to view: SKView){
    self.setup()
    playButton.startPulse()
}

override func didMove(to view: SKView){
    self.setup()
    playButton.startPulse()
}