title: Custom iOS Controller for multiple collections
body: <p>I'm still fairly new to the iOS development scene, so I'm not totally sure where to look for open source controls, etc. The app I want to build will have multiple collections in it.  I'd love to have a view where I can swipe up and down to browse between collections, and then swipe left and right to scroll though that particular collection -- all on one screen.</p>
  
  <p>The app I've seen that basically resembles this is the "Popular" screen on the Mobli app for iOS.</p>
  
  <p>I'd be grateful if anyone has seen something similar already built that I could base it on instead of trying to program a new view from scratch w/ my still limited knowledge.</p>