Ios 不解除分配的场景

我正在制作一款SpriteKit游戏，我遇到了很多麻烦。第一个屏幕是一个菜单，当您单击play（播放）按钮时，玩家将使用以下代码进入游戏：

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch in touches {
        let location:CGPoint = touch.locationInNode(self)
        if self.nodeAtPoint(location).name == "play" {
            playButton.fontColor = colorPressed
            var scene = PlayScene(size: self.size)
            let skView = self.view! as SKView
            skView.ignoresSiblingOrder = true
            skView.showsFPS = false
            skView.showsNodeCount = false
            scene.scaleMode = .AspectFill
            gameStart(scene, skView: skView)
        }
    }
}

func gameStart(scene:SKScene, skView:SKView) {
    let scale = SKAction.scaleTo(0.0, duration: 0.17)
    about.runAction(scale, completion: {
        self.scene?.removeAllChildren()
        self.scene?.removeFromParent()
        skView.presentScene(scene)
    })
}

（PlaySecene是玩家玩游戏的场景）此转换工作正常。这名运动员能够很好地进行比赛。接下来，当玩家输掉游戏时，我使用以下代码转到场景上方的游戏：

func lineHitBadDot(dot: SKSpriteNode) {
    var sceneGG = OverScene(size: self.size)
    let skViewGG = self.view! as SKView
    skViewGG.ignoresSiblingOrder = true
    skViewGG.showsFPS = false
    skViewGG.showsNodeCount = false
    sceneGG.scaleMode = .AspectFill
    let scale = SKAction.scaleTo(0.0, duration: 0.17)
    scoreCounter.runAction(scale, completion: {
        self.scene?.removeAllChildren()
        self.scene?.removeFromParent()
        skViewGG.presentScene(sceneGG)
    })
}

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch in touches {
        let location:CGPoint = touch.locationInNode(self)
        if self.nodeAtPoint(location).name == "retry" {
            var sceneCookie = PlayScene(size: self.size)
            let skViewCookie = self.view! as SKView
            skViewCookie.ignoresSiblingOrder = true
            skViewCookie.showsFPS = false
            skViewCookie.showsNodeCount = false
            sceneCookie.scaleMode = .AspectFill
            gameStart(sceneCookie, skViewD: skViewCookie)
        }
        else if self.nodeAtPoint(location).name == "menu" {
            var sceneCookieB = GameScene(size: self.size)
            let skViewCookieB = self.view! as SKView
            skViewCookieB.ignoresSiblingOrder = true
            skViewCookieB.showsFPS = false
            skViewCookieB.showsNodeCount = false
            sceneCookieB.scaleMode = .AspectFill
            gameStart(sceneCookieB, skViewD: skViewCookieB)
        }
    }
}

func gameStartE(sceneD:SKScene, skViewD:SKView) {
    let scale = SKAction.moveToY(self.size.height + 300, duration: 0.17)
    homeB.runAction(scale, completion: {
        self.scene?.removeAllChildren()
        self.scene?.removeFromParent()
        skViewD.presentScene(sceneD)
    })
}

（OverScene是游戏结束场景）然后，玩家有两个选项，重试或返回菜单场景。这将使用以下代码：

func lineHitBadDot(dot: SKSpriteNode) {
    var sceneGG = OverScene(size: self.size)
    let skViewGG = self.view! as SKView
    skViewGG.ignoresSiblingOrder = true
    skViewGG.showsFPS = false
    skViewGG.showsNodeCount = false
    sceneGG.scaleMode = .AspectFill
    let scale = SKAction.scaleTo(0.0, duration: 0.17)
    scoreCounter.runAction(scale, completion: {
        self.scene?.removeAllChildren()
        self.scene?.removeFromParent()
        skViewGG.presentScene(sceneGG)
    })
}

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch in touches {
        let location:CGPoint = touch.locationInNode(self)
        if self.nodeAtPoint(location).name == "retry" {
            var sceneCookie = PlayScene(size: self.size)
            let skViewCookie = self.view! as SKView
            skViewCookie.ignoresSiblingOrder = true
            skViewCookie.showsFPS = false
            skViewCookie.showsNodeCount = false
            sceneCookie.scaleMode = .AspectFill
            gameStart(sceneCookie, skViewD: skViewCookie)
        }
        else if self.nodeAtPoint(location).name == "menu" {
            var sceneCookieB = GameScene(size: self.size)
            let skViewCookieB = self.view! as SKView
            skViewCookieB.ignoresSiblingOrder = true
            skViewCookieB.showsFPS = false
            skViewCookieB.showsNodeCount = false
            sceneCookieB.scaleMode = .AspectFill
            gameStart(sceneCookieB, skViewD: skViewCookieB)
        }
    }
}

func gameStartE(sceneD:SKScene, skViewD:SKView) {
    let scale = SKAction.moveToY(self.size.height + 300, duration: 0.17)
    homeB.runAction(scale, completion: {
        self.scene?.removeAllChildren()
        self.scene?.removeFromParent()
        skViewD.presentScene(sceneD)
    })
}

返回菜单或重新尝试游戏时，问题会出现。返回菜单时，我看到一个空白屏幕，这意味着按钮已设置动画，因此它将显示初始菜单场景，而不是取消分配旧场景，并创建一个我希望的新场景。当重新尝试游戏时也会发生同样的事情，它会带回旧场景，而不是重新分配并创建新场景。我在互联网上到处寻找，没有找到解决这个问题的办法。非常感谢您的帮助

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谢谢。

删除removeAllChildren和removeFromParent行，它们是不必要的，如果您试图将场景从不存在的父场景中删除，谁知道场景会发生什么。除此之外，使用仪器和分析构建来查找泄漏。@LearnCos2D我之前尝试过，但仍然不起作用。