iOS **HELP** App keeps crashing whenever I try to run in simulator.

[roddymunro]

App is a simple 'test you knowledge' app.

This is what I keep getting:

2014-03-06 21:38:17.241 A2 Computing Quiz[1058:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x15d460f0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key answerField.'
*** First throw call stack:
(0x2d5afe83 0x379106c7 0x2d5afb89 0x2deef3b7 0x2df00ffd 0x2d51f7e9 0x300934df 0x30094d2b 0x2ffad0a7 0x2fd9ea53 0x2fd39a07 0x2fd38cfd 0x2fd9e321 0x3221876d 0x32218357 0x2d57a777 0x2d57a713 0x2d578edf 0x2d4e3471 0x2d4e3253 0x2fd9d5c3 0x2fd98845 0xac059 0x37e09ab7)
libc++abi.dylib: terminating with uncaught exception of type NSException

Not sure what's going on. Can supply additional code if needed. Thanks!

 

[blueroom]

OSX version? Which Mac? Everything up to date?

 

[roddymunro]

OSX version? Which Mac? Everything up to date?

Mavericks 10.9.2 - Xcode is all up to date too

 

[JohnsonK]

Not sure what's going on. Can supply additional code if needed. Thanks!

You did not supply any details or code.

We are programmers, not wizards

 

[roddymunro]

You did not supply any details or code.

We are programmers, not wizards

Oops. That was what was in the debug area at the time. Getting a different result now:

2014-03-06 22:27:56.322 A2 Computing Quiz[617:70b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x8f744d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key answerField.'
*** First throw call stack:
(
	0   CoreFoundation                      0x023645e4 __exceptionPreprocess + 180
	1   libobjc.A.dylib                     0x014be8b6 objc_exception_throw + 44
	2   CoreFoundation                      0x023f46a1 -[NSException raise] + 17
	3   Foundation                          0x00f729ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
	4   Foundation                          0x00edecfb _NSSetUsingKeyValueSetter + 88
	5   Foundation                          0x00ede253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
	6   Foundation                          0x00f4070a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
	7   UIKit                               0x002c1a15 -[UIRuntimeOutletConnection connect] + 106
	8   libobjc.A.dylib                     0x014d07d2 -[NSObject performSelector:] + 62
	9   CoreFoundation                      0x0235fb6a -[NSArray makeObjectsPerformSelector:] + 314
	10  UIKit                               0x002c056e -[UINib instantiateWithOwner:options:] + 1417
	11  UIKit                               0x002c22fb -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 165
	12  UIKit                               0x0001f3bb -[UIApplication _loadMainNibFileNamed:bundle:] + 58
	13  UIKit                               0x0001f6e9 -[UIApplication _loadMainInterfaceFile] + 245
	14  UIKit                               0x0001e28f -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 543
	15  UIKit                               0x0003287c -[UIApplication handleEvent:withNewEvent:] + 3447
	16  UIKit                               0x00032de9 -[UIApplication sendEvent:] + 85
	17  UIKit                               0x00020025 _UIApplicationHandleEvent + 736
	18  GraphicsServices                    0x022c22f6 _PurpleEventCallback + 776
	19  GraphicsServices                    0x022c1e01 PurpleEventCallback + 46
	20  CoreFoundation                      0x022dfd65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
	21  CoreFoundation                      0x022dfa9b __CFRunLoopDoSource1 + 523
	22  CoreFoundation                      0x0230a77c __CFRunLoopRun + 2156
	23  CoreFoundation                      0x02309ac3 CFRunLoopRunSpecific + 467
	24  CoreFoundation                      0x023098db CFRunLoopRunInMode + 123
	25  UIKit                               0x0001dadd -[UIApplication _run] + 840
	26  UIKit                               0x0001fd3b UIApplicationMain + 1225
	27  A2 Computing Quiz                   0x0000265d main + 141
	28  libdyld.dylib                       0x0598f701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

 

[dejo]

Yes, but you still have not provided any code. The first thing a person debugging this is going to want to do is: look at the code where this exception is occurring. So, please be considerate of those you seek help from and provide the code as well. Thank you.

 

[xStep]

My guess is that you have set up an instance variable and connected an IB item to it, then went and renamed the ivar. You have a disconnection between the interface file and its corresponding source file.

Click on the Files Owner and review the Outlets section for a connection to an outlet named answerField.