我对Xcode和Swift很新，在我之前的许多项目中，我一直收到一个Thread 1：signal SIGABRT错误。我无法从错误报告中辨别出问题所在。有人可以帮助找到错误的来源本身。这是错误报告：
2017-05-03 11:10:02.608 coin op[18988:750658] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason:
'[<coin_op.ViewController 0x7f9b33522250> setValue:forUndefinedKey:]:
this class is not key value coding-compliant for the key test.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010bfedd85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010dd91deb objc_exception_throw + 48
2 CoreFoundation 0x000000010bfed9c9 -[NSException raise] + 9
3 Foundation 0x000000010c3bf19b -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
4 UIKit 0x000000010c9a8d0c -[UIViewController setValue:forKey:] + 88
5 UIKit 0x000000010cbdf7fb -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x000000010bf27890 -[NSArray makeObjectsPerformSelector:] + 224
7 UIKit 0x000000010cbde1de -[UINib instantiateWithOwner:options:] + 1864
8 UIKit 0x000000010c9af8d6 -[UIViewController _loadViewFromNibNamed:bundle:] + 381
9 UIKit 0x000000010c9b0202 -[UIViewController loadView] + 178
10 UIKit 0x000000010c9b0560 -[UIViewController loadViewIfRequired] + 138
11 UIKit 0x000000010c9b0cd3 -[UIViewController view] + 27
12 UIKit 0x000000010c886fb4 -[UIWindow addRootViewControllerViewIfPossible] + 61
13 UIKit 0x000000010c88769d -[UIWindow _setHidden:forced:] + 282
14 UIKit 0x000000010c899180 -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x000000010c80ded9 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4131
16 UIKit 0x000000010c814568 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1769
17 UIKit 0x000000010c811714 -[UIApplication workspaceDidEndTransaction:] + 188
18 FrontBoardServices 0x000000010fc228c8 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
19 FrontBoardServices 0x000000010fc22741 -[FBSSerialQueue _performNext] + 178
20 FrontBoardServices 0x000000010fc22aca -[FBSSerialQueue _performNextFromRunLoopSource] + 45
21 CoreFoundation 0x000000010bf13301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
22 CoreFoundation 0x000000010bf0922c __CFRunLoopDoSources0 + 556
23 CoreFoundation 0x000000010bf086e3 __CFRunLoopRun + 867
24 CoreFoundation 0x000000010bf080f8 CFRunLoopRunSpecific + 488
25 UIKit 0x000000010c810f21 -[UIApplication _run] + 402
26 UIKit 0x000000010c815f09 UIApplicationMain + 171
27 coin op 0x000000010bdffe12 main + 114
28 libdyld.dylib 0x000000010e85592d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
答案 0 :(得分：1)
关键信息是：
[UIViewController setValue：forKey：]此类与密钥测试不符合键值编码。
[UIRuntimeOutletConnection connect]
这导致Interface Builder
中的连接断开test和返回