Swift spritekit change scenes? - swift

Question

I have a swift game that uses SpriteKit. I made a game but now I want to create a menu scene. So I changed the GameViewController to load MenuScene.swift like so
extension SKNode {
class func unarchiveFromFile(file : NSString) -> SKNode? {
if let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") {
var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as MenuScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
if let scene = MenuScene.unarchiveFromFile("MenuScene") as? MenuScene {
//if scene = MenuScene.unarchiveFromFile("MenuScene") as? MenuScene {
// 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
scene.size = skView.bounds.size
skView.presentScene(scene)
}
}
It loads MenuScene just fine and I created a play button but now I want to transition to gamescene when clicked so I put in this code
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
if(play.containsPoint(location)) {
gamescene = GameScene(size: self.scene!.size)
self.view!.presentScene(gamescene, transition:reveal)
}
}
}
I have tried numerous other attempts but each time it has crashed into AppDelegate.swift with the error: Thread 1: EXC_BAD_ACCESS(code=EXC_I386_GPFLT)
So what am I doing wrong?

Answer 1

the problem is in sknode extension part.
extension SKNode {
class func unarchiveFromFile(file : NSString) -> SKNode? {
if let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") {
var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
/*
Below Line is the problem. you create an object with gameScene object
type However in here you call it as MenuScene.
*/
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as MenuScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
it will be fixed with creating new skNode extension and modified it . like as:
extension SKNode {
class func unarchiveFromFile2(file : NSString) -> SKNode? {
if let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") {
var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as gameScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
Its very late answer but there must be solution..

Answer 2

Use this code for change your scene :
func changeScene(){
let scene = NameScene(size: self.view!.bounds.size)
scene.backgroundColor = SKColor(red: 1, green: 1, blue: 1, alpha: 1)
scene.scaleMode = .AspectFill
scene.backgroundColor = UIColor.whiteColor()
let transition = SKTransition.pushWithDirection(SKTransitionDirection.Left, duration:0.5)
self.scene?.view?.presentScene(scene, transition: transition)
}

Answer 3

It turns out I had a particle emitter in the menu scene. I forgot to remove it when transitioning. So it was trying to emitting to a scene that did not exist anymore. Fixing it was as simple as adding this line before transitioning to the game scene.
myparticle.removeFromParent();