iOS 7.1动画错误

Question

Yesterday I updated my iPhone 5 to iOS 7.1 and found a strange bug in my current application. There is few UINavigationControllers . After few transition in it the animation of transition become to fast, like there is no animation at all. But more strange that all system animation became to fast, default UITableCell animation, modal window animation and so on.

Does someone know what is this? On device with 7.0.6 there is no such problem.

Looks like it starts to happen after few calls of: [navController setViewControllers:popViewControllers animated:animated];

PS: One more thing - my app is still using iOS 6.1 SDK .

PPS: i don't use custom default animations.

UPDATE: With 7.1 SDK problem still exists.

Answer 1

I have similar problem after updating my iPhone from iOS 7.0.3 to 7.1. I go back and forth several times using the navigation bar and after a few tries there is no transition animation. All animations are broken when it happens, eg. device rotation animation. After reaching this state, few more back and forth transitions cause a crash.

Edit 3:

In my case the problem was because of accessing GUI objects from a background queue. If you experience this issue make sure all GUI objects are accessed from the main thread. Many thanks to Eugene for helping me figure this out.