UIScrollView EXC_BAD_ACCESS crash in iOS SDK

Question

I have an iPhone SDK application that has several views that appear and disappear as the user creates content. After using the application on a device for a while, I get th

Answer 1

All above didn't fix my issue, so I dug deep my code again. I recognized that crash appears when I perform keyboard and UICollectionView animation (yeah, it's a chat) and dismiss current controller.

Application crashes because I try making scrolling in animation completion block :)

Just cut it and all work well now!

Happy coding and debugging :)