本文介绍了Xcode错误 - 终止应用程序由于未捕获异常“NSUnknownKeyException”，原因：'[setValue：forUndefinedKey：]：的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我不知道哪里可能有问题：/
i dont know where can be problem:/
2014-04-11 22:36:33.815 bus[1432:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<TableViewCell 0x8e63160> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key DescriptionLablel.'
*** First throw call stack:
(
0 CoreFoundation 0x017ee1e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x0156d8e5 objc_exception_throw + 44
2 CoreFoundation 0x0187dfe1 -[NSException raise] + 17
3 Foundation 0x0122dd9e -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
4 Foundation 0x0119a1d7 _NSSetUsingKeyValueSetter + 88
5 Foundation 0x01199731 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
6 UIKit 0x0029c508 -[UIView(CALayerDelegate) setValue:forKey:] + 168
7 Foundation 0x011fbb0a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
8 UIKit 0x004e41f4 -[UIRuntimeOutletConnection connect] + 106
9 libobjc.A.dylib 0x0157f7de -[NSObject performSelector:] + 62
10 CoreFoundation 0x017e976a -[NSArray makeObjectsPerformSelector:] + 314
11 UIKit 0x004e2d4d -[UINib instantiateWithOwner:options:] + 1417
12 UIKit 0x00319db0 -[UITableView _dequeueReusableViewOfType:withIdentifier:] + 370
13 UIKit 0x0031a089 -[UITableView dequeueReusableCellWithIdentifier:] + 48
14 UIKit 0x0031a0b9 -[UITableView dequeueReusableCellWithIdentifier:forIndexPath:] + 43
15 bus 0x000034bf -[TableViewController tableView:cellForRowAtIndexPath:] + 127
16 UIKit 0x0032611f -[UITableView _createPreparedCellForGlobalRow:withIndexPath:] + 412
17 UIKit 0x003261f3 -[UITableView _createPreparedCellForGlobalRow:] + 69
18 UIKit 0x00307ece -[UITableView _updateVisibleCellsNow:] + 2428
19 UIKit 0x0031c6a5 -[UITableView layoutSubviews] + 213
20 UIKit 0x0029c964 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
21 libobjc.A.dylib 0x0157f82b -[NSObject performSelector:withObject:] + 70
22 QuartzCore 0x03c5945a -[CALayer layoutSublayers] + 148
23 QuartzCore 0x03c4d244 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
24 QuartzCore 0x03c593a5 -[CALayer layoutIfNeeded] + 160
25 UIKit 0x0035eae3 -[UIViewController window:setupWithInterfaceOrientation:] + 304
26 UIKit 0x00274aa7 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 5212
27 UIKit 0x00273646 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 82
28 UIKit 0x00273518 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 117
29 UIKit 0x002735a0 -[UIWindow _setRotatableViewOrientation:duration:force:] + 67
30 UIKit 0x0027263a __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 120
31 UIKit 0x0027259c -[UIWindow _updateToInterfaceOrientation:duration:force:] + 400
32 UIKit 0x002732f3 -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 870
33 UIKit 0x002768e6 -[UIWindow setDelegate:] + 449
34 UIKit 0x00350b77 -[UIViewController _tryBecomeRootViewControllerInWindow:] + 180
35 UIKit 0x0026c474 -[UIWindow addRootViewControllerViewIfPossible] + 591
36 UIKit 0x0026c5ef -[UIWindow _setHidden:forced:] + 312
37 UIKit 0x0026c86b -[UIWindow _orderFrontWithoutMakingKey] + 49
38 UIKit 0x002773c8 -[UIWindow makeKeyAndVisible] + 65
39 UIKit 0x00227bc0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 2097
40 UIKit 0x0022c667 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
41 UIKit 0x00240f92 -[UIApplication handleEvent:withNewEvent:] + 3517
42 UIKit 0x00241555 -[UIApplication sendEvent:] + 85
43 UIKit 0x0022e250 _UIApplicationHandleEvent + 683
44 GraphicsServices 0x037e3f02 _PurpleEventCallback + 776
45 GraphicsServices 0x037e3a0d PurpleEventCallback + 46
46 CoreFoundation 0x01769ca5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
47 CoreFoundation 0x017699db __CFRunLoopDoSource1 + 523
48 CoreFoundation 0x0179468c __CFRunLoopRun + 2156
49 CoreFoundation 0x017939d3 CFRunLoopRunSpecific + 467
50 CoreFoundation 0x017937eb CFRunLoopRunInMode + 123
51 UIKit 0x0022bd9c -[UIApplication _run] + 840
52 UIKit 0x0022df9b UIApplicationMain + 1225
53 bus 0x00003a4d main + 141
54 libdyld.dylib 0x01e35701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
推荐答案
这意味着在nib文件中有一个名为 DescriptionLablel 的出口，但是你的代码中没有属性。 Label拼写错误，因此可能是您的问题。
It means that in a nib file you have an outlet called DescriptionLablel, but you don't have a property for it in your code. "Label" is misspelled, so that could be your problem.
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