Com o ObjectiveC, estou desenvolvendo um aplicativo SingleView voltado para o iOS 11 com um controlador de exibição / exibição. No Main.storyboard, na parte superior da exibição, derrubei um WebKit View (WKWebView).

Estou vendo uma falha no Simulator e em um iPhone 6 com iOS 11.0.1:

Finalizando o aplicativo devido à exceção não capturada 'NSInvalidUnarchiveOperationException', motivo: 'Não foi possível instanciar a classe denominada WKWebView'

Preciso de mais alguma coisa para que funcione? Parece que não é possível instanciar o WKWebView ao sair do storyboard.

Outros detalhes:

Xcode versão 9.0 9A235Quando eu removo o WKWebView do Storyboard, a falha desapareceApp Base SDK - iOS mais recente (iOS 11); Destino de implantação 11.0Usando o WebView (descontinuado) - UIWebView, ele funcionaNão tentei instanciar manualmente

Pilha de falha:

2017-11-06 18:38:27.765519+0200 XYZZMap[15689:1093338] *** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named WKWebView'
*** First throw call stack:
(
    0   CoreFoundation                      0x00000001056d01cb __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x0000000105032f41 objc_exception_throw + 48
    2   CoreFoundation                      0x0000000105744b95 +[NSException raise:format:] + 197
    3   UIKit                               0x000000010692d2c0 UINibDecoderDecodeObjectForValue + 323
    4   UIKit                               0x000000010692d5db UINibDecoderDecodeObjectForValue + 1118
    5   UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    6   UIKit                               0x00000001062f866b -[UIView initWithCoder:] + 969
    7   UIKit                               0x000000010692d43d UINibDecoderDecodeObjectForValue + 704
    8   UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    9   UIKit                               0x00000001066dd1a7 -[UIRuntimeConnection initWithCoder:] + 178
    10  UIKit                               0x000000010692d43d UINibDecoderDecodeObjectForValue + 704
    11  UIKit                               0x000000010692d5db UINibDecoderDecodeObjectForValue + 1118
    12  UIKit                               0x000000010692d172 -[UINibDecoder decodeObjectForKey:] + 89
    13  UIKit                               0x00000001066dc3a4 -[UINib instantiateWithOwner:options:] + 1262
    14  UIKit                               0x00000001063f8d07 -[UIViewController _loadViewFromNibNamed:bundle:] + 383
    15  UIKit                               0x00000001063f9610 -[UIViewController loadView] + 177
    16  UIKit                               0x00000001063f9941 -[UIViewController loadViewIfRequired] + 195
    17  UIKit                               0x00000001063fa19e -[UIViewController view] + 27
    18  UIKit                               0x00000001062cdd17 -[UIWindow addRootViewControllerViewIfPossible] + 122
    19  UIKit                               0x00000001062ce41f -[UIWindow _setHidden:forced:] + 294
    20  UIKit                               0x00000001062e12bf -[UIWindow makeKeyAndVisible] + 42
    21  UIKit                               0x0000000106255015 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4711
    22  UIKit                               0x000000010625a245 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1720
    23  UIKit                               0x0000000106615c6c __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 924
    24  UIKit                               0x00000001069e33ef +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
    25  UIKit                               0x0000000106615865 -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 249
    26  UIKit                               0x00000001066160c3 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 668
    27  UIKit                               0x0000000106f73c11 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 262
    28  UIKit                               0x0000000106f73aca -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 444
    29  UIKit                               0x0000000106c61b9c __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 420
    30  UIKit                               0x0000000106e5cc3e _performActionsWithDelayForTransitionContext + 100
    31  UIKit                               0x0000000106c61998 -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 231
    32  UIKit                               0x00000001069e2a4c -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
    33  UIKit                               0x0000000106258ac6 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 523
    34  UIKit                               0x0000000106821523 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 369
    35  FrontBoardServices                  0x000000010b539158 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 338
    36  FrontBoardServices                  0x000000010b541c4d __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 235
    37  libdispatch.dylib                   0x00000001096b643c _dispatch_client_callout + 8
    38  libdispatch.dylib                   0x00000001096bbaf4 _dispatch_block_invoke_direct + 592
    39  FrontBoardServices                  0x000000010b56d672 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
    40  FrontBoardServices                  0x000000010b56d328 -[FBSSerialQueue _performNext] + 464
    41  FrontBoardServices                  0x000000010b56d897 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
    42  CoreFoundation                      0x00000001056732b1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    43  CoreFoundation                      0x0000000105712d31 __CFRunLoopDoSource0 + 81
    44  CoreFoundation                      0x0000000105657c19 __CFRunLoopDoSources0 + 185
    45  CoreFoundation                      0x00000001056571ff __CFRunLoopRun + 1279
    46  CoreFoundation                      0x0000000105656a89 CFRunLoopRunSpecific + 409
    47  GraphicsServices                    0x000000010be609c6 GSEventRunModal + 62
    48  UIKit                               0x000000010625bd30 UIApplicationMain + 159
    49  XYZZMap                             0x00000001047274bf main + 111
    50  libdyld.dylib                       0x0000000109732d81 start + 1
    51  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Obrigado!