i have a general question about view controllers and how to handle them in a clean way when i develop a SpriteKit based game.
What i did so far:
Go to the segues and use Show Detail Segues anywhere that you don't want the previous view controller to be kept in the stack. Keep in mind that you will have to reinitialize everything appropriately in those view controllers whenever you do return to them.
If you pay attention, viewDidAppear loads every time that you see the view appear, while with your current setup, viewDidLoad would only be called initially and if you returned to the viewController, only viewDidAppear would be called.
When you use a segue to transition out of a viewController, prepareForSegue is called, but deinit() is only called when you use a show detail segue (or custom segue with those specific properties about it), because the view, like you said, is loaded into memory so it can be retrieved easier.