gameViewController 背景颜色不能更改

Question

在 spriteKit 下运行的 App。几天前，当 gameViewController 被加载后，gameScene 就被加载了。今天把它的加载动作改成只有点击开始按钮才加载gameScene，也就是说gameScene背景色是不可见的，我需要给gameViewController设置一个背景色。这是一项非常简单的任务，需要多次完成 之前，但它坚持浅灰色（下图）。

spriteKit下不能改变gameViewController背景色吗？

我必须改为更改 gameScene 背景颜色吗？

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .green

        // .......
    }

  @IBAciton func loadGameView() {
        if let view = self.view as! SKView? {
            // Load the SKScene from 'GameScene.sks'
            // if let scene = SKScene(fileNamed: "GameScene") {
            if let scene = GameScene(fileNamed: "GameScene") {
                scene.viewController = self
                scene.size = self.view.frame.size
                scene.scaleMode = .aspectFill
                // Present the scene
                view.presentScene(scene)

            }

            view.ignoresSiblingOrder = false
            view.showsFPS = false
            view.showsNodeCount = false
            view.showsDrawCount = false


        }

    }

Answer 1

    if let scene = GameScene(fileNamed: "GameScene") {
            scene.viewController = self
            scene.size = self.view.frame.size
            scene.scaleMode = .aspectFill

            //ADD THIS
            scene.color = .green
            scene.colorBlendFactor = 1

            // Present the scene
            view.presentScene(scene)

     }