如何检测哪个场景？（swift/spritekit/xcode）

我在gameviewcontroller中使用以下代码作为背景：

    let yourImage = UIImage(named: welkeLevel)
    let imageview = UIImageView(image: yourImage)
    self.view?.addSubview(imageview)

但我有一个开始（菜单）的场景，我不想要这个背景，仍然出现

如何检测我是哪一个场景（游戏场景/菜单场景等）

---

或者还有其他方法吗？

SKScene

是

SKNode

的子类。您可以使用name属性来执行此操作。只需将

游戏场景

或

Menuscene

的名称设置为

'game'

或

'menu'

，如下所示：

scene.name = "game"

并检查属性，如下所示：

if self.name == "game"{
    //Do something.
    println("game")
} else if self.name == "menu
    //Do something else.
    println("menu")
}

---

我是将此代码放在viewcontroller还是游戏场景中？谢谢，因为它说gameviewcontroller在这行代码中没有名为“name”的成员：if self.name==“game”{第一个块应该在视图控制器中，第二个块应该在实际游戏场景中。如果需要在视图控制器中使用第二个块，只需将self替换为对要检查的场景的引用。我想在我的视图控制器中使用第二个块，但我不知道将self替换为对要检查的场景的引用是什么意思要检查。我要检查场景是否为一个游戏场景，但如果我将self.name更改为GameSecene.name，则会出现错误

I have worked out the same issue with a replay button. I have to identify which scene the user is in and reload the same when user clicks replay button.

1) Add a extension function  to detect current game level

extension SKScene {

    static func sceneWithClassNamed(className: String, fileNamed fileName: String) -> SKScene? {
        if let SceneClass = NSClassFromString("JumperCrab.\(className)") as? SKScene.Type,
            let scene = SceneClass(fileNamed: fileName) {
                return scene
        }
        return nil
    }

    func replayCurrentScene(currentLevelName: String,currentGameSceneIndex:Int)
    {
        GameViewController().getReplayCurrentSceneDetailsToVC(currentLevelName, currentGameSceneIndex: currentGameSceneIndex)
    }
}

2) Call the above extension method in every game scene.

    override func didMoveToView(view: SKView) {
        self.replayCurrentScene( "Round 1", currentGameSceneIndex: 0)
}

3) Set up a similar method at the View Controller.

    func getReplayCurrentSceneDetailsToVC(currentLevelName: String,currentGameSceneIndex:Int)
    {
        NSUserDefaults.standardUserDefaults().setInteger(currentGameSceneIndex, forKey: "LevelInt")
        NSUserDefaults.standardUserDefaults().synchronize()

        NSUserDefaults.standardUserDefaults().setObject(currentLevelName, forKey: "LevelName")
        NSUserDefaults.standardUserDefaults().synchronize()

    }

4)  Create variables 

    //GAME LEVEL
    var gameLevelSceneNameArray = NSArray()
    var currentGameSceneAtVC:String?
    var currentGameSceneIndexAtVC:Int?

5) Make my level list array

  override func viewDidLoad() {
        super.viewDidLoad()

        //Game Scenes
        gameLevelSceneNameArray = ["GameScene","SecondRound","ThirdRound", "FourthRound","FifthRound","SixthRound","SeventhRound", "EighthRound","NinethRound"]
}

6) Apply on the Replay Game button .

    @IBAction func replayButtonClicked(sender: AnyObject) {

    currentGameSceneIndexAtVC =   NSUserDefaults.standardUserDefaults().integerForKey("LevelInt")
    currentGameSceneAtVC = NSUserDefaults.standardUserDefaults().objectForKey("LevelName") as? String

 self.moveToSelectedGameLevel(currentGameSceneAtVC!, gameSceneName: self.gameLevelSceneNameArray[currentGameSceneIndexAtVC!] as! String)

    }

7) Set up a game scene navigation too (using switch case )


func moveToSelectedGameLevel(levelNameString:String, gameSceneName:String)
    {
        let skView = self.view as! SKView
        switch(levelNameString)
        {
        case "Round 1":
            if let gameScene = SKScene.sceneWithClassNamed(gameSceneName, fileNamed: gameSceneName) {
                skView.presentScene(gameScene)
            }
        case "Round 2" :
            if let gameScene = SKScene.sceneWithClassNamed(gameSceneName, fileNamed: gameSceneName) {
                skView.presentScene(gameScene)
            }
        case "Round 3":
            if let gameScene = SKScene.sceneWithClassNamed(gameSceneName, fileNamed: gameSceneName) {
                skView.presentScene(gameScene)
        default:
            print("")
        }
    }