got warnings as below every time I perform segue:
[Assert] UINavigationBar decoded as unlocked for UINavigationController, or navigationBar delegate set up incorrectly. Inconsistent configuration may cause problems. navigationController=<UINavigationController: 0x10bf01280>, navigationBar=<UINavigationBar: 0x10bab7c80; frame = (0 0; 0 50); opaque = NO; autoresize = W; layer = <CALayer: 0x118e83f80>> delegate=0x10bf01280
Seems it does not direct crash my App directly since I always got this warning after a new iOS (forgot which version).
But I got a crash as the attached report, not sure any relation with this warning, or due to another cause, thank you for your help.