title: Does a project have to be created as a sprite kit or can the framework simply be added?
body: <p>I am taking a step backwards to learn sprite kit for the 2D Games I'm making, as opposed to using UIKit. In all the tutorials I've gone through, they've created the new project as a Sprite-Kit as opposed to single-view. Just wondering if I'll have to recreate my games or if I can simply add the sprite kit framework to my existing project? 
  Thanks. </p>