如何在SpriteKit中创建无休止的滚动背景和场景切换？

let background = SKSpriteNode(imageNamed: "background")
background.position = CGPoint(x: frame.midX, y: frame.midY)
background.zPosition = -1
addChild(background)

let moveLeft = SKAction.moveBy(x: -background.size.width, y: 0, duration: 5)
let resetPosition = SKAction.moveBy(x: background.size.width, y: 0, duration: 0)
let sequence = SKAction.sequence([moveLeft, resetPosition])
let endlessAction = SKAction.repeatForever(sequence)

background.run(endlessAction)

class SceneManager: SKNode {
    var scenes: [SKScene] = []
    var currentSceneIndex: Int = 0
    
    func addScene(scene: SKScene) {
        scenes.append(scene)
    }
    
    func switchToNextScene() {
        currentSceneIndex += 1
        if currentSceneIndex >= scenes.count {
            currentSceneIndex = 0
        }
        
        let transition = SKTransition.fade(withDuration: 0.5)
        let nextScene = scenes[currentSceneIndex]
        scene?.view?.presentScene(nextScene, transition: transition)
    }
}

let sceneManager = SceneManager()
let scene1 = GameScene(size: frame.size)
let scene2 = MenuScene(size: frame.size)

sceneManager.addScene(scene: scene1)
sceneManager.addScene(scene: scene2)

sceneManager.switchToNextScene()