2014-02-14 13:30:41.013 MyInvitationCard[2043:70b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<CardIndexViewController 0x8d34d60> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key CardLabel.'
*** First throw call stack:
(
0 CoreFoundation 0x017435e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x014c68b6 objc_exception_throw + 44
2 CoreFoundation 0x017d36a1 -[NSException raise] + 17
3 Foundation 0x011879ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
4 Foundation 0x010f3cfb _NSSetUsingKeyValueSetter + 88
5 Foundation 0x010f3253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
6 Foundation 0x0115570a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
7 UIKit 0x004d6a15 -[UIRuntimeOutletConnection connect] + 106
8 libobjc.A.dylib 0x014d87d2 -[NSObject performSelector:] + 62
9 CoreFoundation 0x0173eb6a -[NSArray makeObjectsPerformSelector:] + 314
10 UIKit 0x004d556e -[UINib instantiateWithOwner:options:] + 1417
11 UIKit 0x00347605 -[UIViewController _loadViewFromNibNamed:bundle:] + 280
12 UIKit 0x00347dad -[UIViewController loadView] + 302
13 UIKit 0x003480ae -[UIViewController loadViewIfRequired] + 78
14 UIKit 0x003485b4 -[UIViewController view] + 35
15 UIKit 0x003623e2 -[UINavigationController _startCustomTransition:] + 778
16 UIKit 0x0036f0c7 -[UINavigationController _startDeferredTransitionIfNeeded:] + 688
17 UIKit 0x0036fcb9 -[UINavigationController __viewWillLayoutSubviews] + 57
18 UIKit 0x004a9181 -[UILayoutContainerView layoutSubviews] + 213
19 UIKit 0x0029f267 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
20 libobjc.A.dylib 0x014d881f -[NSObject performSelector:withObject:] + 70
21 QuartzCore 0x03b512ea -[CALayer layoutSublayers] + 148
22 QuartzCore 0x03b450d4 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
23 QuartzCore 0x03b44f40 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
24 QuartzCore 0x03aacae6 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
25 QuartzCore 0x03aade71 _ZN2CA11Transaction6commitEv + 393
26 QuartzCore 0x03aae544 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
27 CoreFoundation 0x0170b4ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
28 CoreFoundation 0x0170b41f __CFRunLoopDoObservers + 399
29 CoreFoundation 0x016e9344 __CFRunLoopRun + 1076
30 CoreFoundation 0x016e8ac3 CFRunLoopRunSpecific + 467
31 CoreFoundation 0x016e88db CFRunLoopRunInMode + 123
32 GraphicsServices 0x036e89e2 GSEventRunModal + 192
33 GraphicsServices 0x036e8809 GSEventRun + 104
34 UIKit 0x00234d3b UIApplicationMain + 1225
35 MyInvitationCard 0x000070bd main + 141
36 libdyld.dylib 0x01d8170d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
答案 0 :(得分：1)
检查.xib文件并查找“！”出口标签中的标记。似乎您在.h / .m文件中更改了插座名称，但忘记在.xib中重新连接它。
查看更多信息here。
答案 1 :(得分：0)
在推送 viewController 时，检查您提供的 xib 名称。可能是您在分配期间将不同的 xib 名称传递给其他 viewController 。 另外，请检查 IBOutlet 连接。