iOS Paper fold (origami / accordion) effect animation, with manual control

Question

I\'m looking for tips on how to implement the popular \'paper folding / origami\' effect in my iOS project.

I\'m aware of projects such as: https://github.com/xyfe

Answer 1

This is the best solution I've seen:

http://api.mutado.com/mobile/paperstack/

EDIT: What about this: the paper folding/unfolding effect in twitter for iPad