没有任何警告，当我点击故事板文件时，我的 xcode 应用程序突然开始崩溃。经过一番挖掘，我发现很多人说要这样做：
"Go to
/Library/Developer/CoreSimulator/Profiles/Runtimes
and remove the profiles in there. Restart Xcode and it should work!"
当我在finder中搜索此文件夹时，转到文件夹功能，它说找不到。其他人说要清除颜色选择器，但这仍然对我不起作用。Xcode 在 beta 1 和 4（我有）中都崩溃了。我真的可以使用一些帮助。
更新此错误消息也出现在警告通知中：由于缺少入口点，场景无法访问，并且没有通过 -instantiateViewControllerWithIdentifier: 进行运行时访问的标识符。
这是崩溃时的弹出窗口：
Process: Xcode [6312]
Path: /Applications/Xcode-beta.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 7.0 (8163.8)
Build Info: IDEFrameworks-8163008000000000~7
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [6312]
User ID: 501
Date/Time: 2015-07-27 11:55:06.545 -0500
OS Version: Mac OS X 10.11 (15A225f)
Report Version: 11
Anonymous UUID: CCD99EAB-C0B0-7A00-2973-B979C02BC5E7
Sleep/Wake UUID: AB09C466-CD98-48A5-B0DE-2D18DB8F52CB
Time Awake Since Boot: 5500 seconds
Time Since Wake: 3400 seconds
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Application Specific Information:
ProductBuildVersion: 7A152u
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEInterfaceBuilder/IDEInterfaceBuilder-8152.3/InterfaceBuilderKit/Utilities/IBPlatformToolFailureHandler.m:315
Details: Failed to determine the values for ibLayoutInset, intrinsicContentSize, baselineOffsetFromBottom, firstBaselineOffsetFromTop, ibLayoutMargins, ibLeftBarButtonItemTitleRects, ibRightBarButtonItemTitleRects, ibLeftBarButtonItemFrames, ibRightBarButtonItemFrames, and ibTitleViewFrame of IBUINavigationBar.
Encountered an error communicating with Interface Builder Cocoa Touch Tool. If you choose to file a crash report or Radar for this issue, please zip and attach the diagnostics at "/var/folders/p7/2jw_957n4t12wkx9hm4vn_tc0000gn/T/IB-agent-diagnostics_2015-07-27_11-55-06_310000" to your crash report.
Exception name: IBPlatformToolFailureException
Exception reason: The agent crashed
Application Specific Information:
*** Terminating app due to uncaught exception 'NSRangeException', reason: 'Cannot remove an observer <AVPlayerViewController 0x7c84ee00> for the key path "playerController.hasEnabledAudio" from <AVPlayerViewController 0x7c84ee00> because it is not registered as an observer.'
terminating with uncaught exception of type NSException
abort() called
CoreSimulator 169 - Device: iPad 2 - Runtime: iOS 9.0 (13A4293g) - DeviceType: iPad 2
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x06937632 __pthread_kill + 10
1 libsystem_pthread.dylib 0x068ff4a8 pthread_kill + 101
2 libsystem_c.dylib 0x066a247d abort + 156
3 libc++abi.dylib 0x0624fae7 abort_message + 151
4 libc++abi.dylib 0x06270683 default_terminate_handler() + 300
5 libobjc.A.dylib 0x025960d7 _objc_terminate() + 108
6 libc++abi.dylib 0x0626dd0d std::__terminate(void (*)()) + 14
7 libc++abi.dylib 0x0626d93e __cxa_rethrow + 103
8 libobjc.A.dylib 0x02595fce objc_exception_rethrow + 47
9 com.apple.CoreFoundation 0x029e3fe0 CFRunLoopRunSpecific + 672
10 com.apple.CoreFoundation 0x029e3d2b CFRunLoopRunInMode + 123
11 com.apple.Foundation 0x021af30e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 308
12 com.apple.dt.IBFoundation 0x01e2c257 -[IBAbstractPlatformTool startServingReceiveChannel:] + 471
13 com.apple.dt.IBFoundation 0x01e2c45d -[IBAbstractPlatformTool startServingWriteDescriptor:readDescriptor:] + 129
14 com.apple.dt.IBFoundation 0x01e2d0e9 +[IBAbstractPlatformTool main] + 1325
15 Interface Builder Cocoa Touch Tool 0x00058753 0x57000 + 5971
16 libdyld.dylib 0x065f5a21 start + 1
Last command:
_ON_QUEUE_sendMessage:toChannelReturningError:during:
Backtrace of last command:
0 0x000000011b7ca76d -[IBAbstractPlatformToolProxy _ON_QUEUE_sendMessage:toChannelReturningError:during:] (in IDEInterfaceBuilderKit)
1 0x000000011b7ca632 __74-[IBAbstractPlatformToolProxy sendMessage:toChannelReturningError:during:]_block_invoke (in IDEInterfaceBuilderKit)
2 0x00007fff8cd02c45 _dispatch_client_callout (in libdispatch.dylib)
3 0x00007fff8cd036f2 _dispatch_barrier_sync_f_invoke (in libdispatch.dylib)
4 0x000000010e3d7370 DVTDispatchSync (in DVTFoundation)
5 0x000000011b7ca555 -[IBAbstractPlatformToolProxy sendMessage:toChannelReturningError:during:] (in IDEInterfaceBuilderKit)
6 0x000000011ca0273a (in IDEInterfaceBuilderCocoaTouchIntegration)
7 0x000000011ca17fde (in IDEInterfaceBuilderCocoaTouchIntegration)
8 0x000000011cb48b8c (in IDEInterfaceBuilderCocoaTouchIntegration)
9 0x000000011cb4547e (in IDEInterfaceBuilderCocoaTouchIntegration)
10 0x000000011b9491fa -[NSView(IBViewIntegration) ibLayoutInset] (in IDEInterfaceBuilderKit)
11 0x000000011b949606 -[NSView(IBViewIntegration) ibLayoutBounds] (in IDEInterfaceBuilderKit)
12 0x000000011b9496bc -[NSView(IBViewIntegration) ibLayoutFrame] (in IDEInterfaceBuilderKit)
13 0x000000011b95c631 -[NSView(IBViewIntegration) ibLoggingDescription] (in IDEInterfaceBuilderKit)
14 0x000000011b95c80d -[NSView(IBViewIntegration) ibDefaultSubtreeDescription] (in IDEInterfaceBuilderKit)
15 0x0000000117ea1f90 -[NSObject(IBAutolayoutObjectIntegration) ibRecursivelyAddSubtreeDescriptionToString:indentation:layoutInfo:withIteratorBlock:andAdditionalDescriptionsBlock:] (in IBAutolayoutFoundation)
16 0x0000000117ea22d3 -[NSObject(IBAutolayoutObjectIntegration) ibSubtreeDescriptionWithLayoutInfo:withIteratorBlock:startingIndentation:andAdditionalDescriptionsBlock:] (in IBAutolayoutFoundation)
17 0x0000000117e79729 -[IBAutolayoutArbitrationUnit debugDescription] (in IBAutolayoutFoundation)
18 0x000000011c9d1428 (in IDEInterfaceBuilderCocoaTouchIntegration)
19 0x000000011b7a6e51 +[IBPlatformToolFailureHandler failureHandlerWithContext:failure:diagnosticsHandlerBlock:] (in IDEInterfaceBuilderKit)
20 0x000000011c9d2022 (in IDEInterfaceBuilderCocoaTouchIntegration)
21 0x000000011b6a2e9e __72-[IBDocumentAutolayoutManager updateAutolayoutStatusInArbitrationUnits:]_block_invoke (in IDEInterfaceBuilderKit)
22 0x000000011b69bd33 -[IBDocumentAutolayoutManager _runAutolayoutCommandForArbitrationUnits:withBlock:] (in IDEInterfaceBuilderKit)
23 0x000000011b6a2da5 -[IBDocumentAutolayoutManager updateAutolayoutStatusInArbitrationUnits:] (in IDEInterfaceBuilderKit)
24 0x000000011b6a31c5 -[IBDocumentAutolayoutManager didFireAutolayoutStatusDelayedInvocation:] (in IDEInterfaceBuilderKit)
25 0x000000010e22afc8 -[DVTDelayedInvocation runBlock:] (in DVTFoundation)
26 0x000000010e22b53a -[DVTDelayedInvocation invokeIfNeeded] (in DVTFoundation)
27 0x000000010e22bb17 -[DVTDelayedInvocation invoke] (in DVTFoundation)
28 0x000000011b6a24ef -[IBDocumentAutolayoutManager autolayoutStatusForArbitrationUnitContainingObject:] (in IDEInterfaceBuilderKit)
29 0x000000011b69ef36 -[IBDocumentAutolayoutManager isItemMisplaced:] (in IDEInterfaceBuilderKit)
30 0x000000011b69f4f9 __61-[IBDocumentAutolayoutManager itemsWithCleanAutolayoutStatus]_block_invoke (in IDEInterfaceBuilderKit)
31 0x0000000117f5bfde -[NSSet(IBSetAdditions) ib_setByFilteringUsingBlock:] (in IBFoundation)
32 0x000000011b69f49e -[IBDocumentAutolayoutManager itemsWithCleanAutolayoutStatus] (in IDEInterfaceBuilderKit)
33 0x000000011b6a3470 -[IBDocumentAutolayoutManager preserveCleanAutolayoutStatusDuring:] (in IDEInterfaceBuilderKit)
34 0x000000011b6861e4 -[IBDocument preserveCleanAutolayoutStatusDuring:] (in IDEInterfaceBuilderKit)
35 0x000000011b86ceec -[IBResourceManager synchronizeObjectPropertyValuesWithVariantContext] (in IDEInterfaceBuilderKit)
36 0x000000011b86a400 __66-[IBResourceManager setupVariantContextWithContainerRepositories:]_block_invoke (in IDEInterfaceBuilderKit)
37 0x000000010fb9452c -[IDEMediaResourceVariantContext registerVariantContextObserverWithOptions:block:] (in IDEKit)
38 0x000000011b869fb2 -[IBResourceManager setupVariantContextWithContainerRepositories:] (in IDEInterfaceBuilderKit)
39 0x000000011b86a557 -[IBResourceManager setResourceProvidingContainer:] (in IDEInterfaceBuilderKit)
40 0x000000011b65ffda -[IBDocument setResourceProvidingContainer:] (in IDEInterfaceBuilderKit)
41 0x000000011b65ec9d -[IBDocument refreshWorkspaceSourcedContent] (in IDEInterfaceBuilderKit)
42 0x000000011b65ef63 -[IBDocument registerWorkspaceDocument:forEditorViewController:] (in IDEInterfaceBuilderKit)
43 0x000000011b53b940 -[IBAbstractDocumentEditor viewDidInstall] (in IDEInterfaceBuilderKit)
44 0x000000011b8c9355 -[IBStoryboardDocumentEditor viewDidInstall] (in IDEInterfaceBuilderKit)
45 0x000000010ea565f8 -[DVTViewController _didInstallContentView:] (in DVTKit)
46 0x000000010e842345 -[DVTControllerContentView _viewDidInstall] (in DVTKit)
47 0x000000010e841be2 -[DVTControllerContentView viewDidMoveToWindow] (in DVTKit)
48 0x00007fff97ceb33e -[NSView _setWindow:] (in AppKit)
49 0x00007fff97cf605b -[NSView addSubview:] (in AppKit)
50 0x00007fff97ea6533 -[NSView setSubviews:] (in AppKit)
51 0x000000010e834ac8 -[DVTBorderedView setContentView:] (in DVTKit)
52 0x000000010f59a2cd -[IDEEditorContext _setEditorView] (in IDEKit)
53 0x000000010f7424e0 -[IDEEditorContext setupNewEditor:] (in IDEKit)
54 0x000000010f743dc9 __91-[IDEEditorContext _openNavigableItem:documentExtension:document:shouldInstallEditorBlock:]_block_invoke (in IDEKit)
55 0x000000010f5a976b -[IDEEditorContext _performBlockInsideReentrantGuard:] (in IDEKit)
56 0x000000010f5a923b -[IDEEditorContext _openNavigableItem:documentExtension:document:shouldInstallEditorBlock:] (in IDEKit)
57 0x000000010f5dba67 -[IDEEditorContext _openNavigableItem:withContentsOfURL:documentExtension:shouldInstallEditorBlock:] (in IDEKit)
58 0x000000010f745698 -[IDEEditorContext _notifyDelegateAndOpenNavigableItem:withContentsURL:documentExtensionIdentifier:locationToSelect:annotationRepresentedObject:stateDictionary:annotationWantsIndicatorAnimation:exploreAnnotationRepresentedObject:highlightSelection:alwaysReplaceExistingNavigableItem:skipSubDocumentNavigationUnlessEditorIsReplaced:] (in IDEKit)
59 0x000000010f61ae82 -[IDEEditorContext _notifyDelegateAndOpenEditorOpenSpecifier:updateHistory:] (in IDEKit)
60 0x000000010f61a739 -[IDEEditorContext _openEditorOpenSpecifier:updateHistory:] (in IDEKit)
61 0x000000010f61a59a -[IDEEditorContext openEditorOpenSpecifier:] (in IDEKit)
62 0x000000010f61a480 -[IDEEditorModeViewController openEditorOpenSpecifier:editorContext:] (in IDEKit)
63 0x000000010f61a2cc -[IDEEditorArea _openEditorOpenSpecifier:editorContext:takeFocus:] (in IDEKit)
64 0x000000010f783756 __108+[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:]_block_invoke (in IDEKit)
65 0x000000010f61a16d +[IDEEditorCoordinator _doOpenWithWorkspaceTabController:editorContext:target:allowFallback:documentURL:usingBlock:] (in IDEKit)
66 0x000000010f619a39 +[IDEEditorCoordinator _doOpenEditorOpenSpecifier:forWorkspaceTabController:editorContext:target:takeFocus:] (in IDEKit)
67 0x000000010f6195bf -[_IDEOpenRequest _runIfNecessary] (in IDEKit)
68 0x00007fff9781efd8 __NSFireDelayedPerform (in Foundation)
69 0x00007fff892da5d4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation)
70 0x00007fff892da263 __CFRunLoopDoTimer (in CoreFoundation)
71 0x00007fff893571ba __CFRunLoopDoTimers (in CoreFoundation)
72 0x00007fff89295e21 __CFRunLoopRun (in CoreFoundation)
73 0x00007fff89295488 CFRunLoopRunSpecific (in CoreFoundation)
74 0x00007fff96cdc701 RunCurrentEventLoopInMode (in HIToolbox)
75 0x00007fff96cdc497 ReceiveNextEventCommon (in HIToolbox)
76 0x00007fff96cdc2d7 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)
77 0x00007fff97d4469b _DPSNextEvent (in AppKit)
78 0x00007fff981115d9 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit)
79 0x000000010e9555fe -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)
80 0x00007fff97d3a54c -[NSApplication run] (in AppKit)
81 0x00007fff97cbc6e2 NSApplicationMain (in AppKit)
82 0x00007fff8d8f55ad start (in libdyld.dylib)