作为一个刚开始编程的人，我不断得到这些Sigabrts。我想如果我知道如何自己解决这些简单的错误，但我不知道从哪里开始:(我甚至没有触及AppDelegate，那就是Sigabrt所在的地方......希望你们能帮忙： ）
2016-03-24 15:33:38.938 EXTBP[4833:289124] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<EXTBP.LoginViewController 0x7faa41443dc0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key loginButton.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010b2d2e65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010d012deb objc_exception_throw + 48
2 CoreFoundation 0x000000010b2d2aa9 -[NSException raise] + 9
3 Foundation 0x000000010b69b9bb -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
4 UIKit 0x000000010bc7e320 -[UIViewController setValue:forKey:] + 88
5 UIKit 0x000000010beacf41 -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x000000010b2134a0 -[NSArray makeObjectsPerformSelector:] + 224
7 UIKit 0x000000010beab924 -[UINib instantiateWithOwner:options:] + 1864
8 UIKit 0x000000010bc84eea -[UIViewController _loadViewFromNibNamed:bundle:] + 381
9 UIKit 0x000000010bc85816 -[UIViewController loadView] + 178
10 UIKit 0x000000010bc85b74 -[UIViewController loadViewIfRequired] + 138
11 UIKit 0x000000010bc862e7 -[UIViewController view] + 27
12 UIKit 0x000000010bb5cab0 -[UIWindow addRootViewControllerViewIfPossible] + 61
13 UIKit 0x000000010bb5d199 -[UIWindow _setHidden:forced:] + 282
14 UIKit 0x000000010bb6ec2e -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x000000010bae7663 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4131
16 UIKit 0x000000010baedcc6 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1760
17 UIKit 0x000000010baeae7b -[UIApplication workspaceDidEndTransaction:] + 188
18 FrontBoardServices 0x000000010eea4754 -[FBSSerialQueue _performNext] + 192
19 FrontBoardServices 0x000000010eea4ac2 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
20 CoreFoundation 0x000000010b1fea31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
21 CoreFoundation 0x000000010b1f495c __CFRunLoopDoSources0 + 556
22 CoreFoundation 0x000000010b1f3e13 __CFRunLoopRun + 867
23 CoreFoundation 0x000000010b1f3828 CFRunLoopRunSpecific + 488
24 UIKit 0x000000010baea7cd -[UIApplication _run] + 402
25 UIKit 0x000000010baef610 UIApplicationMain + 171
26 EXTBP 0x000000010af3853d main + 109
27 libdyld.dylib 0x000000010e45392d start + 1
28 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
