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Question

I have a crash when i click in the back bar in the navigation bar, the crash log is:

-[__NSCFType hidesBottomBarWhenPushed]: unrecognized selector sent to instance 0x2f2480

what can be the reason of my crash?

thanks for your answers

Answer 1

I don't know what NSCFType is, maybe a Core Foundation placeholder for unknown types. As far as I know it's not documented, but it often shows up as the target of over-released pointers. In other words, you released your UIViewController and then tried to read the property hidesBottomBarWhenPushed .