I have a pause system with a function and a button and it works perfect, i know when the app enters background it automatically pauses and when it comes back it automaticall
In your scene or view, you should be able to handle pause by adding an observer to it
NSNotificationCenter.defaultCenter().addObserver(self,selector:Selector("pauseGame:",name:"Pause",object:nil)
Then you add a function to handle this
func pauseGame(notification:NSNotification)
{
self.paused = true;
}
Now keep in mind I have found that in iOS 8 there is a bug where CBApplicationDidBecomeActive can cause undesirable results, so you need to override this in your SKView's class like this:
class GameSceneView : SKView
{
...//Other Code
func CBApplicationDidBecomeActive()
{
}
}