how to detect which scene? (swift/spritekit/xcode) - xcode

Question

I am using this code for my background in the gameviewcontroller:
let yourImage = UIImage(named: welkeLevel)
let imageview = UIImageView(image: yourImage)
self.view?.addSubview(imageview)
But I have a begin (menu) scene where I do not want this background and is still showing up.
How do I detect which scene I am (Gamescene / Menuscene etc.)?
Or is there another way?

Answer 1

SKScene is a subclass of SKNode. You can use the name property to do this. Just set the name of Gamescene or Menuscene to 'game' or 'menu' like this:
scene.name = "game"
And check the property like so:
if self.name == "game"{
//Do something.
println("game")
} else if self.name == "menu
//Do something else.
println("menu")
}

Answer 2

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("")
}
}