【发布时间】：2018-04-16 06:12:39
【问题描述】：
我试图在 UITableView 底部添加一个工具栏，该工具栏已成功添加。但是当我将条形按钮与 IBAction 连接时， 在加载该视图控制器应用程序时会崩溃。没有链接 到 IbAction 应用程序工作正常。
我正在使用 xCode 9.2
这是我的故事板。
这是崩溃日志。
2018-04-11 11:11:38.636121+0500 SafeBolt[9610:88848] *** Assertion failure in -[_UINavigationBarVisualProviderModernIOS _contentViewFittingHeight], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3698.33.6/_UINavigationBarVisualProviderModernIOS.m:569
2018-04-11 11:11:38.662356+0500 SafeBolt[9610:88848] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Sigh. Contentview size is zero.'
*** First throw call stack:
(
0 CoreFoundation 0x00000001072b612b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00000001063fdf41 objc_exception_throw + 48
2 CoreFoundation 0x00000001072bb2f2 +[NSException raise:format:arguments:] + 98
3 Foundation 0x0000000105e9ed69 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 193
4 UIKit 0x00000001085d22f5 -[_UINavigationBarVisualProviderModernIOS _contentViewFittingHeight] + 265
5 UIKit 0x00000001083505e0 -[UINavigationItem _desiredHeightForBarMetrics:defaultHeightBlock:] + 90
6 UIKit 0x00000001085d4fa1 -[_UINavigationBarVisualProviderModernIOS heightRangeFittingWidth:] + 412
7 UIKit 0x0000000107ae40ed -[UINavigationBar _heightRangeForNavigationItem:fittingWidth:] + 210
8 UIKit 0x0000000107bc0a98 -[UINavigationController _intrinsicNavigationBarHeightRangeForViewController:] + 187
9 UIKit 0x0000000107bc09b6 -[UINavigationController _preferredHeightForHidingNavigationBarForViewController:] + 628
10 UIKit 0x0000000107bb088f -[UINavigationController _positionNavigationBarHidden:edge:initialOffset:] + 356
11 UIKit 0x0000000107bb0cf8 -[UINavigationController _positionNavigationBarHidden:edge:] + 388
12 UIKit 0x0000000107bb8555 -[UINavigationController loadView] + 243
13 UIKit 0x0000000107b7b05c -[UIViewController loadViewIfRequired] + 195
14 UIKit 0x0000000107b7b8b9 -[UIViewController view] + 27
15 iOS_Slide_Menu 0x00000001054bbe5a -[SlideNavigationController setEnableShadow:] + 74
16 iOS_Slide_Menu 0x00000001054b9804 -[SlideNavigationController setup] + 244
17 iOS_Slide_Menu 0x00000001054b9541 -[SlideNavigationController initWithCoder:] + 145
18 UIKit 0x0000000107e644c8 -[UIClassSwapper initWithCoder:] + 246
19 UIKit 0x00000001080b9109 UINibDecoderDecodeObjectForValue + 704
20 UIKit 0x00000001080b8e3e -[UINibDecoder decodeObjectForKey:] + 89
21 UIKit 0x0000000107ae075a -[UINavigationBar initWithCoder:] + 753
22 UIKit 0x00000001080b9109 UINibDecoderDecodeObjectForValue + 704
23 UIKit 0x00000001080b8e3e -[UINibDecoder decodeObjectForKey:] + 89
24 UIKit 0x000000010834b5f2 -[UINavigationItem initWithCoder:] + 1018
25 UIKit 0x00000001080b9109 UINibDecoderDecodeObjectForValue + 704
26 UIKit 0x00000001080b8e3e -[UINibDecoder decodeObjectForKey:] + 89
27 UIKit 0x0000000107b76053 -[UIViewController initWithCoder:] + 432
28 SafeBolt 0x000000010448dfa2 _T08SafeBolt18BaseViewControllerCACSgSo7NSCoderC5coder_tcfc + 66
29 SafeBolt 0x000000010446db83 _T08SafeBolt26EmailListingViewControllerCACSgSo7NSCoderC5coder_tcfc + 1315
30 SafeBolt 0x000000010446dc4f _T08SafeBolt26EmailListingViewControllerCACSgSo7NSCoderC5coder_tcfcTo + 47
31 UIKit 0x0000000107e644c8 -[UIClassSwapper initWithCoder:] + 246
32 UIKit 0x00000001080b9109 UINibDecoderDecodeObjectForValue + 704
33 UIKit 0x00000001080b8e3e -[UINibDecoder decodeObjectForKey:] + 89
34 UIKit 0x0000000107e64194 -[UIRuntimeConnection initWithCoder:] + 178
35 UIKit 0x0000000107e648d0 -[UIRuntimeEventConnection initWithCoder:] + 59
36 UIKit 0x00000001080b9109 UINibDecoderDecodeObjectForValue + 704
37 UIKit 0x00000001080b92a7 UINibDecoderDecodeObjectForValue + 1118
38 UIKit 0x00000001080b8e3e -[UINibDecoder decodeObjectForKey:] + 89
39 UIKit 0x0000000107e63391 -[UINib instantiateWithOwner:options:] + 1262
40 UIKit 0x00000001082f3fc2 -[UIStoryboard instantiateViewControllerWithIdentifier:] + 181
41 SafeBolt 0x000000010448eda2 _T08SafeBolt11AppDelegateC23setUpRootViewControlleryyF + 386
42 SafeBolt 0x000000010448f6b5 _T08SafeBolt11AppDelegateC11applicationSbSo13UIApplicationC_s10DictionaryVySC0F16LaunchOptionsKeyVypGSg022didFinishLaunchingWithI0tF + 101
43 SafeBolt 0x000000010448f79a _T08SafeBolt11AppDelegateC11applicationSbSo13UIApplicationC_s10DictionaryVySC0F16LaunchOptionsKeyVypGSg022didFinishLaunchingWithI0tFTo + 186
44 UIKit 0x00000001079cabca -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 299
45 UIKit 0x00000001079cc648 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4113
46 UIKit 0x00000001079d1aeb -[UIApplication _runWithMainScene:transitionContext:completion:] + 1720
47 UIKit 0x0000000107d9b6f8 __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 924
48 UIKit 0x00000001081714c8 +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
49 UIKit 0x0000000107d9b2f1 -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 249
50 UIKit 0x0000000107d9bb6b -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 696
51 UIKit 0x0000000108719a69 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 262
52 UIKit 0x0000000108719922 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 444
53 UIKit 0x00000001083f69c8 __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 221
54 UIKit 0x00000001085f5b06 _performActionsWithDelayForTransitionContext + 100
55 UIKit 0x00000001083f688b -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 231
56 UIKit 0x0000000108170b25 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
57 UIKit 0x00000001079d036a -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 523
58 UIKit 0x0000000107fab605 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 369
59 FrontBoardServices 0x000000010d340cc0 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 338
60 FrontBoardServices 0x000000010d3497b5 __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 235
61 libdispatch.dylib 0x000000010af5933d _dispatch_client_callout + 8
62 libdispatch.dylib 0x000000010af5e9f3 _dispatch_block_invoke_direct + 592
63 FrontBoardServices 0x000000010d375498 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
64 FrontBoardServices 0x000000010d37514e -[FBSSerialQueue _performNext] + 464
65 FrontBoardServices 0x000000010d3756bd -[FBSSerialQueue _performNextFromRunLoopSource] + 45
66 CoreFoundation 0x0000000107259101 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
67 CoreFoundation 0x00000001072f8f71 __CFRunLoopDoSource0 + 81
68 CoreFoundation 0x000000010723da19 __CFRunLoopDoSources0 + 185
69 CoreFoundation 0x000000010723cfff __CFRunLoopRun + 1279
70 CoreFoundation 0x000000010723c889 CFRunLoopRunSpecific + 409
71 GraphicsServices 0x000000010dcb79c6 GSEventRunModal + 62
72 UIKit 0x00000001079d35d6 UIApplicationMain + 159
73 SafeBolt 0x0000000104490d27 main + 55
74 libdyld.dylib 0x000000010afd5d81 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
这是 IbAction 的代码。
@IBAction func testAction(_ sender: UIBarButtonItem) {
}
任何帮助将不胜感激。
【问题讨论】：
-
崩溃发生在哪一行？
-
@Nitish 抱歉，实际上我的意思是
Action/Outlet无论您要绑定什么，请确保它已正确绑定在 VC 中。 -
@dahiya_boy ：绑定插座不是强制性的。如果只使用action，就不需要创建outlet的属性。
-
代码会很有帮助。
-
@dahiya_boy ：可能是。如果 OP 共享代码，事情会更清楚。