ios - Weird crash while navigating back -

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my app crashes randomly when navigating in navigationcontroller. here know:

  • it happens randomly (sometimes, can come once or twice , if reload viewcontroller , press "back" again crash)
  • it happens empty viewcontroller (i tried comment out code in viewcontroller.h , .m , remove outlets links)
  • nothing shows in debug console, exec_bad_access shown in main.m

i spent afternoon on , tried everything.
don't include code right because have no idea look. said, happens empty viewcontroller.

any thoughts or similar experience ?

edit:

  • yes tried add exception breakpoint
  • i tried find observer issues spark debugger.

edit 2: actually, viewcontrollers not that empty. import on uiview category problem. check answer below.

it's difficult causing without more information, in experience common reason exc_bad_access when tries call selector on deallocated instance. issue can lot easier debug if enable zombie objects.

edit scheme -> diagnostics -> enable zombie objects

now instead of getting bad access exception should more helpful "message sent deallocated instance" error (assuming that's problem), along method being called on class of object.


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