我有一个使用标签栏控制器的项目。最近，当我打开项目时，“内部错误”提示输出，崩溃xcode。任何人都知道如何解决它？
ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-933/IBPlugin/WidgetIntegration/IBUITabBar/IBUITabBar.m:118
Details: This item isn't in this tab bar.
Object: <IBUITabBar: 0x402284780>
Method: -frameForItem:
Thread: <NSThread: 0x40010a260>{name = (null), num = 1}
Hints: None
Backtrace:
0 0x00000001080df366 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in IDEKit)
1 0x00000001077561a4 _DVTAssertionFailureHandler (in DVTFoundation)
2 0x000000010b9afafa (in IDEInterfaceBuilderCocoaTouchIntegration)
3 0x000000010b9efeeb (in IDEInterfaceBuilderCocoaTouchIntegration)
4 0x000000010b1f999c -[NSObject(IBFrameworkObjectIntegration) ibVisibleRectForChild:inFrameController:] (in IDEInterfaceBuilderKit)
5 0x000000010b9e2584 (in IDEInterfaceBuilderCocoaTouchIntegration)
6 0x000000010b9effe3 (in IDEInterfaceBuilderCocoaTouchIntegration)
7 0x000000010b2113e5 -[IBEditorCanvasFrameController clippedRectForObject:] (in IDEInterfaceBuilderKit)
8 0x000000010b212a16 -[IBEditorCanvasFrameController objectsFromBackToFrontAtPoint:] (in IDEInterfaceBuilderKit)
9 0x000000010b212af3 -[IBEditorCanvasFrameController objectAtPoint:] (in IDEInterfaceBuilderKit)
10 0x000000010b228d91 -[IBViewEditorCanvasFrameController trackMeasurementsWithEvent:atPoint:] (in IDEInterfaceBuilderKit)
11 0x000000010b228f19 -[IBViewEditorCanvasFrameController sendEvent:] (in IDEInterfaceBuilderKit)
12 0x00007fff86d0452a -[NSWindow sendEvent:] (in AppKit)
13 0x00007fff86c9c3a5 -[NSApplication sendEvent:] (in AppKit)
14 0x0000000107fe7a11 -[IDEApplication sendEvent:] (in IDEKit)
15 0x00007fff86c32682 -[NSApplication run] (in AppKit)
16 0x00007fff86eb180c NSApplicationMain (in AppKit)
17 0x00000001076e5eec (in Xcode)
答案 0 :(得分：0)
检查您是否已正确连接所有IBOutlet＆amp;代表，数据源。