How can I replicate the rotation and animation effects I see in the Twitter iPad app?

I wish开发者_C百科 to replicate the effect I see in the iPad Twitter application, thus:

How?

Your question is a broad one, so I'll give a broad answer:

Screen rotation is handled automatically by your app. (There is a method to implement for that though.)

The rest of the UI is probably scroll views and nested table views.