App crashing all of a sudden
I recently started the testing the app on my old iPhone 5, and it was working fine on both the phone and simulator (before testing on real device). Then all of a sudden, it started crashing due a view controller, but I don't understand what it means. Here is what it gives me:
2014-07-11 09:44:01.677 tap counter 1[941:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<ThirtySecondViewController 0x146179d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key background.'
*** First throw call stack:
(0x2f9f4e83 0x39d516c7 0x2f9f4b89 0x303343b7 0x30345ffd 0x2f9647e9 0x324d84df 0x3243a0fb 0x3229bb59 0x3217d79d 0x3217d719 0x322275cf 0x32263c97 0x322625c5 0x32261631 0x3243d47b 0x321adda3 0x321add3f 0x321add13 0x32199743 0x321ad75b 0x321ad425 0x321a8451 0x3217dd79 0x3217c569 0x2f9bff1f 0x2f9bf3e7 0x2f9bdbd7 0x2f928471 0x2f928253 0x346622eb 0x321dd845 0x38081 0x3a24aab7)
libc++abi.dylib: terminating with uncaught exception of type NSException81
What does it mean by "Key background". The "ThirtySecondViewController" was working perfectly in the simulator, but is no longer, and had direct code copy from another view controller that serves the same purpose. Please help me, because I plan to release the app in a couple of weeks. Anything will be helpful.