"modifying layer that is being finalized" error when popping navigation controller

I'm using navigation controller for my app. In one of views I have an animation that is fired by timer. When I click back I get this message in console:

modifying layer that is being finalized

I think that it's because animation is still running after dealloc. I found how to remove animations but it's not working in this case:

[toolbarView.layer removeAllAnimations];

Is there a different way to release this viewcontro开发者_C百科ller without problems?

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That is due to releasing problem. in my case, i m allocating a class inside the method and that i am pushing to next view controller . after that i m releasing that class.so it is showing that error.

solution.... i initialized in .h and released in dealloc.now it is working fine.