title: When to use CCScene vs CCLayer?
body: <p>I'm kind of a UI buff - every "screen" in my game should transition in/out when it appears or disappears. Because my game is simple in terms of resources, I thought I'd just make each "screen" a CCLayer and define a function for the transitions, leaving everything in memory. It's turning out to be more complicated than I expected.</p>
  
  <p>I think I have two main problems right now:</p>
  
  <p>1) Each "screen" is a CCLayer. This looks fine, but I can't seem to stop receiving touch events, even when they are inactive. Child sprites do not seem to respect the isTouchEnabled property, so I'm hitting invisible buttons all the time.</p>
  
  <p>2) I wrote a custom button class that is basically a sprite with a few separate textures for states. It uses the CCTargetedTouchDelegate protocol. I'm thinking this is a big part of the above problem.</p>
  
  <p>I'm not quite clear on the CCMenu stuff. Is there a tutorial or documentation out there that better explains its designed purpose and how to use it? The documentation for cocos2d doesn't talk at all about what each class does, which makes it much, much harder to properly use the library. Also, when should I use a scene instead of layers? Can I write custom transitions?</p>