Does not work on iOS 7

[Usipov]

on iOS7 if you pushViewController animated, and then popToRootViewController not animated, and then again pushViewController animated, you will see

nested pop animation can result in corrupted navigation bar
nested push animation can result in corrupted navigation bar

[Usipov]

I also tried to repeat all the same scenario forcing the 'animated' parameter to be 'YES'. the animations did occur correctly, but the navigation bar was corrupted

nested pop animation can result in corrupted navigation bar