Как заархивировать GameScene, а затем перезагрузить GameScene с узлами в том же положении?

Question

Я пытаюсь перезагрузить тот же GameScene вместо того, чтобы создать новый, когда пользователь переходит в другую сцену, а затем обратно в root GameScene.

Пока это мой код, он компилируется, но это я получаю нулевое значение, возвращаемое при попытке конвертировать данные в GameScene. Так что он просто создает новую GameScene.

Вот моя ссылка на github: https://github.com/kwilly123/GameSceneReload/tree/master

class GameScene: SKScene {

var kirby: SKSpriteNode!
var kirbyFrames: [SKTexture] = []

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    kirby = aDecoder.decodeObject(forKey: "kirby") as? SKSpriteNode
    kirbyFrames = (aDecoder.decodeObject(forKey: "kirbyFrames") as? [SKTexture])!
    print("KIRBY: \(kirby)")
}

override init(size: CGSize) {
    super.init(size: size)
}

override func encode(with aCoder: NSCoder) {
    aCoder.encode(kirby, forKey: "kirby")
    aCoder.encode(kirbyFrames, forKey: "kirbyFrames")
}

override func didMove(to view: SKView) {
    self.name = "KIRBY GAME"
    let button = SKSpriteNode(color: .red, size: CGSize(width: 50, height: 30))
    button.position = CGPoint(x: frame.size.width / 2, y: frame.size.height / 2)
    button.name = "pause"
    addChild(button)
    createAnimation()
    makeKirby()
    runAnimation()
    kirby.name = "Kirby"
}

func makeKirby() {
    let firstFrameTexture = kirbyFrames[0]
    kirby = SKSpriteNode(texture: firstFrameTexture)
    kirby.size = CGSize(width: 50, height: 50)
    kirby.position = CGPoint(x: frame.midX, y: frame.midY + 150)
    addChild(kirby)
}

func createAnimation() {
    let animation = SKTextureAtlas(named: "kirby")
    var frames: [SKTexture] = []

    let numImages = animation.textureNames.count
    for i in 1...numImages {
        let textureName = "kirby-\(i)"
        frames.append(animation.textureNamed(textureName))
    }
    kirbyFrames = frames
}

func runAnimation() {
    kirby.run(SKAction.repeatForever(SKAction.animate(with: kirbyFrames, timePerFrame: 0.1)))
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let location = touch.location(in: self)
        let nodesArray = nodes(at: location)

        for node in nodesArray {
            if node.name == "pause" {
                self.isPaused = true
                sceneDidEnterBackground()
                let secondScene = SecondGameScene(size: (view?.bounds.size)!)
                secondScene.scaleMode = .aspectFill
                secondScene.alpha = 0.7
                scene?.view?.presentScene(secondScene)
            }
        }
    }
}

@objc func sceneDidEnterBackground() {
    print("working")
    let sceneData = try? NSKeyedArchiver.archivedData(withRootObject: self, requiringSecureCoding: false)
    print("Saving Scene Data: \(sceneData)")
    UserDefaults.standard.set(sceneData, forKey: "currentScene")
}

class func loadScene() -> SKScene? {
    var scene: SKScene?

    if let savedSceneData = UserDefaults.standard.object(forKey: "currentScene") as? Data {
        guard let savedScene = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(savedSceneData) as? GameScene
            else {
                print("nil")
                return nil
        }
        print("SAVED SCENE: \(savedScene)")
        print("SAVED SCENE DATA: \(savedSceneData)")
        print("LOADED SCENE")
        scene = savedScene
        print("SCENE SIZE: \(scene?.size)")
    } else {
        scene = nil
    }

    return scene
}

}

// СЛЕДУЮЩАЯ Сцена ИГРЫ

class SecondGameScene: SKScene {

override func didMove(to view: SKView) {
    let button = SKSpriteNode(color: .red, size: CGSize(width: 50, height: 30))
    button.position = CGPoint(x: frame.size.width / 2, y: frame.size.height / 2)
    button.name = "go back"
    addChild(button)
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let location = touch.location(in: self)
        let nodesArray = nodes(at: location)

        for node in nodesArray {
            if node.name == "go back" {
                if let rootScene = GameScene.loadScene() {
                    print("SUCCESS: \(rootScene)")
                    scene!.scaleMode = .aspectFill
                    scene?.view?.presentScene(rootScene)
                } else {
                    print("FAILED")
                }
            }
        }
    }
}

}