Slow Skscene transition

I have two scenes: Home and Play. The transition to play scene is really slow compared to the transition to home scene. I think this is because there’s more happing in my play scene. Is there any way I can preload play scene ? Or make the transition more seamless?

I’m interested in the answer in this forum Preload a Scene to prevent lag?
but I have no idea where to begin. Where do I place part A and B of the answer

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  • Here is what I’m using

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        let touch = touches
        let location = touch.first!.locationInNode(self)
        let node = self.nodeAtPoint(location)
    
        if (node.name == "Balloon") {
    
            let sceneAction = SKAction.runBlock({
                let secondScene = Scene2(size: self.size)
                let transition = SKTransition.fadeWithDuration(1)
                secondScene.scaleMode = SKSceneScaleMode.AspectFill
                self.scene!.view?.presentScene(secondScene, transition: transition)
            })
                PlayButton.runAction(SKAction.sequence([sound,SKAction.animateWithTextures(array, timePerFrame: 0.1),sceneAction,SKAction.waitForDuration(1)]))
    
    
        }    
    

    Any other solution is fine.

    Thanks

    Solutions Collect From Internet About “Slow Skscene transition”

    I do this and works:
    in didView of HomeScene put preloadGameScene()
    And always in home scene:

    fileprivate var nextScene: SKScene?
    
    func preloadGameScene () {
        let qualityOfServiceClass = QOS_CLASS_BACKGROUND
        let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
        dispatch_async(backgroundQueue, {
            self.nextScene = GameScene(fileNamed:"yoursksfilename")
            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                print("SCENE LOADED")
                let loading = self.childNodeWithName("Loading") as? SKLabelNode
                self.playButton?.hidden = false
                self.playButton?.alpha = 0
                //loading?.hidden = true
                self.playButton?.runAction(SKAction.fadeAlphaTo(1.0, duration: 0.4))
                loading!.runAction(SKAction.fadeAlphaTo(0.0, duration: 0.4))
            })
    
        })
    }
    

    goToGameScene() is called by a button personal SKButton class:

        func goToGameScene () {
            guard let nextScene = nextScene else {return}
            let transition = SKTransition.crossFadeWithDuration(0.5)
            nextScene.scaleMode = .AspectFill
            scene!.view?.presentScene(nextScene, transition: transition)
        }
    

    UPDATE SWIFT 3

    fileprivate var nextScene: SKScene?
    
    func preloadGameScene () {
            let qualityOfServiceClass = DispatchQoS.QoSClass.background
            let backgroundQueue = DispatchQueue.global(qos: qualityOfServiceClass)
            backgroundQueue.async(execute: {
                self.nextScene = GameScene(fileNamed:"yoursksfilename")
                DispatchQueue.main.async(execute: { () -> Void in
                    print("SCENE LOADED")
                    let loading = self.childNode(withName: "Loading") as? SKLabelNode
                    self.playButton?.isHidden = false
                    self.playButton?.alpha = 0
                    //loading?.hidden = true
                    self.playButton?.run(SKAction.fadeAlpha(to: 1.0, duration: 0.4))
                    loading?.run(SKAction.fadeAlpha(to: 0.0, duration: 0.4))
                })
    
            })
        }