SKScene Present Scene Transition not Working with SpriteKit Scene in Swift

Question

I am trying to get an SKScene presentScene with transition behavior to work. The presentScene technically works although all I get is the default MoveUp transition behavior. I am loading a SpriteKit Scene from archive for the scene. It doesn't seem to matter what I put in for the transition type, I always get the default behavior. I have debugged to make sure that the transition has a value (i.e., not nil). I am using iCloud and coreData managed objects, although I don't know how this would impact the scene presentation. I have included the managed object code in the viewWillAppear.

class GameViewController: UIViewController, GameDelegate {
var managedObjectContext: NSManagedObjectContext!
var heroCharacter : HeroCharacter!

override func viewDidLoad() {
    super.viewDidLoad()

    presentGameScene()
}

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)

    // access the application managed object context - jwg
    managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext

    // Persistant Store Changes uses the coordinator
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "receivePersistantStoreDidChange", name: NSPersistentStoreCoordinatorStoresDidChangeNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "receivePersistantStoreWillChange:", name: NSPersistentStoreCoordinatorStoresWillChangeNotification, object: managedObjectContext.persistentStoreCoordinator)

    // iCloud notifications using the coordinator
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "receiveICloudChanges:", name: NSPersistentStoreDidImportUbiquitousContentChangesNotification, object: managedObjectContext.persistentStoreCoordinator)
}

// MARK: scenes
func presentGameScene() {
    if let scene = GameScene.unarchiveFromFile("GameScene") as? GameScene {

        // Configure the view.
        let skView = self.view as! SKView
        skView.showsFPS = true
        skView.showsNodeCount = true

        /* Sprite Kit applies additional optimizations to improve rendering performance */
        skView.ignoresSiblingOrder = true

        /* Set the scale mode to scale to fit the window */
        scene.scaleMode = .AspectFill

        // set target values
        scene.heroCharacter = heroCharacter
        scene.viewDelegate = self

        // this transition is not working
        let transition = SKTransition.fadeWithDuration(10)
        skView.presentScene(scene, transition: transition)
    }
}

The scene code is pretty generic as well

override func didMoveToView(view: SKView) {
    // access the application managed object context - jwg
    managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext

    // Setup physics world's contact delegate
    physicsWorld.contactDelegate = self

    // Setup waterfall
    waterfall = self.childNodeWithName(kWaterfallName) as? SKSpriteNode

    // Setup goal
    goal = self.childNodeWithName("goal") as? SKSpriteNode

    // Setup initial camera position
    updateCamera()

    // load texture atlases
    CharacterSprite.loadTextureAtlasArrays()

    var textureAtlasArray = [SKTextureAtlas]()
    textureAtlasArray.append(SKTextureAtlas(named: kIcebergAtlas))

    SKTextureAtlas.preloadTextureAtlases(textureAtlasArray, withCompletionHandler: { () -> Void in
        #if DEBUG
            print("completed loading atlases")
        #endif
        self.startScene()
    })
}

func updateCamera() {
    if let camera = camera {
        camera.position = CGPoint(x: characterSprite!.position.x, y: characterSprite!.position.y)
    }
}

crashoverride777 crashoverride777 · Accepted Answer · 2016-01-01T20:34:12

Why are you fading for 10 seconds? Seems long. Also is this the code in your GameViewController?

SKTransitions will only work when transitioning from 1 SKScene to another SKScene. Loading the first scene from your GameViewController will not use a transition since there is technically nothing to transition from.

As a side note, in swift 2 you can get rid of the extension to unarchive the SKScene. You can also just say (if you are using GameScene.sks)

if let scene = GameScene(fileNamed: "GameScene") {
...
}

SKScene Present Scene Transition not Working with SpriteKit Scene in Swift

1 Answers