2016-12-14 23:17:04.949 TestProject[15212:17645799] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<TestProject.ViewController 0x7fc224609360> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key theLabel.' *** First throw call stack: ( 0 CoreFoundation 0x000000010f53234b __exceptionPreprocess + 171 1 libobjc.A.dylib 0x000000010c93221e objc_exception_throw + 48 2 CoreFoundation 0x000000010f532299 -[NSException raise] + 9 3 Foundation 0x000000010c44226f -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291 4 UIKit 0x000000010cf9b4ef -[UIViewController setValue:forKey:] + 88 5 UIKit 0x000000010d20f79e -[UIRuntimeOutletConnection connect] + 109 6 CoreFoundation 0x000000010f4d7590 -[NSArray makeObjectsPerformSelector:] + 256 7 UIKit 0x000000010d20e122 -[UINib instantiateWithOwner:options:] + 1867 8 UIKit 0x000000010cfa1c21 -[UIViewController _loadViewFromNibNamed:bundle:] + 386 9 UIKit 0x000000010cfa2543 -[UIViewController loadView] + 177 10 UIKit 0x000000010cfa2878 -[UIViewController loadViewIfRequired] + 201 11 UIKit 0x000000010cfa30cc -[UIViewController view] + 27 12 UIKit 0x000000010ce6cc51 -[UIWindow addRootViewControllerViewIfPossible] + 71 13 UIKit 0x000000010ce6d3a2 -[UIWindow _setHidden:forced:] + 293 14 UIKit 0x000000010ce80cb5 -[UIWindow makeKeyAndVisible] + 42 15 UIKit 0x000000010cdf9c89 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4818 16 UIKit 0x000000010cdffde9 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731 17 UIKit 0x000000010cdfcf69 -[UIApplication workspaceDidEndTransaction:] + 188 18 FrontBoardServices 0x0000000110bf6723 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24 19 FrontBoardServices 0x0000000110bf659c -[FBSSerialQueue _performNext] + 189 20 FrontBoardServices 0x0000000110bf6925 -[FBSSerialQueue _performNextFromRunLoopSource] + 45 21 CoreFoundation 0x000000010f4d7311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 22 CoreFoundation 0x000000010f4bc59c __CFRunLoopDoSources0 + 556 23 CoreFoundation 0x000000010f4bba86 __CFRunLoopRun + 918 24 CoreFoundation 0x000000010f4bb494 CFRunLoopRunSpecific + 420 25 UIKit 0x000000010cdfb7e6 -[UIApplication _run] + 434 26 UIKit 0x000000010ce01964 UIApplicationMain + 159 27 TestProject 0x000000010c3530ef main + 111 28 libdyld.dylib 0x000000011045f68d start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

Occurs immediately when you try to start the simulator enter image description here

Closed due to the fact that the essence of the question is incomprehensible by the participants Max Mikheyenko , VAndrJ , Denis , user194374, aleksandr barakin 24 Dec '16 at 23:59 .

Try to write more detailed questions. To get an answer, explain what exactly you see the problem, how to reproduce it, what you want to get as a result, etc. Give an example that clearly demonstrates the problem. If the question can be reformulated according to the rules set out in the certificate , edit it .

  • one
    error from the bottom right of the console. copy all the text and add to the question - Max Mikheyenko
  • @ MaxMikheyenko added! - Goncharoff
  • Check theLabel, it is not connected to your code - VAndrJ

1 answer 1

In the code (in particular, ViewController.swift), the variable is called theLabel1 , and in the construction code, the link is written to the variable theLabel .

Either change the variable back, or make a new link from the storyboard

  • I tried, but something does not help - Goncharoff
  • maybe there is another problem? - Goncharoff
  • may still make sense to make clean rebuild. If you want to give a link to the project, it will be faster to see - Max Mikheyenko
  • yadi.sk/d/cPQdTRz733dt6s - Goncharoff
  • corrected the answer @Goncharoff - Max Mikheyenko