Switching Scenes in SpriteKit Swift 2

Question

I have been trying to make a game in sprite kit and I want to implement a start screen with a play button that takes you to the actual game. I have seen many ways to do it but most of them use swift 1 and are not up to date Here is the code to my function

func switchScene()
{
    let scene = GameScene(fileNamed: "PlayScene")
    let transition = SKTranstion.crossFadeWithDuration(1)
    self?.view.presentScene(scene, transition)
}

where PlayScene is a swift class that extends SKScene

Answer 1

In my games, I use this:

// Setting a size (or else it may look like its zoomed in)
var selectView = BallSelect(size: view!.bounds.size) 
// Setting a file for that scene
selectView = BallSelect(fileNamed: "BallSelect")! 
// Setting the scale
selectView.scaleMode = SKSceneScaleMode.AspectFill 
// Transitioning scenes wit a specific transition
self.scene?.view?.presentScene(selectView, transition: SKTransition.fadeWithColor(color, duration: 1)) 

Tell me if it works :)