a question similar to this was [asked](https://stackoverflow.com/questions/7775195/splitview-like-facebook-app-on-iphone) before and there are [tonnes](https://stackoverflow.com/a/7777624/766570) of open source examples for a single layered split view.. but I was wondering if there was one similar to the sparrow email client app, where you can drag/hide multiple views.. 

![enter image description here](https://i.stack.imgur.com/RtnBL.png)