Xcode 4.5故事板崩溃
当我试图编辑故事板中的UILabels时，Xcode会崩溃。 任何想法可能导致这个？ 看起来它与自动布局约束之一有关。 这是错误报告：
Process: Xcode [43938] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 4.5 (1839) Build Info: IDEApplication-1839000000000000~3 App Item ID: 497799835 App External ID: 10747437 Code Type: X86-64 (Native) Parent Process: launchd [43283] Date/Time: 2012-10-01 09:43:36.443 -0400 OS Version: Mac OS X 10.7.4 (11E53) Report Version: 9 Sleep/Wake UUID: 8C7C93A7-0BEF-42C6-944C-488D8C7896DD Interval Since Last Report: 152594 sec Crashes Since Last Report: 6 Per-App Interval Since Last Report: 135715 sec Per-App Crashes Since Last Report: 5 Anonymous UUID: E745D8FE-362B-4FD2-8594-7EC5C26767B2 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Application Specific Information: ProductBuildVersion: 4G182 ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-1926/IBPlugin/Utilities/IBObjectMarshalling.m:651 Details: Failed to start deciding frames for IBNSLayoutConstraint, IBUILabel, IBUITabBarItem, IBUITableView, IBUIView, and IBUIViewController. Interface Builder encountered an error communicating with the iOS Simulator. If you choose to file a crash report or radar for this issue, please check Console.app for crash reports for "Interface Builder Cocoa Touch Tool" and include their content in your crash report. Exception name: IBAssertionFailure Exception reason: ASSERTION FAILURE: realConstraint Reason: Should have found real constraint for represented constraint <NSLayoutConstraint:0x86a8c30 H:[UIView:0x868a0f0(71)]> File: /SourceCache/IBAutolayoutFoundationIOS/IBAutolayoutFoundation-1818/Framework/Classes/Arbitration/IBAutolayoutEngine.m:223 Method: __76-[IBAutolayoutEngine realConstraintsFromCollectionOfRepresentedConstraints:]_block_invoke_0 Exception backtrace: 0. CoreFoundation 0x022a4012 __exceptionPreprocess 1. libobjc.A.dylib 0x01703e7e objc_exception_throw 2. CoreFoundation 0x0232cfb1 -[NSException raise] 3. ??? 0x0000beae [IBCocoaTouchTool startAutolayoutFrameDecisionSessionWithRequest:document:] 4. ??? 0x000342a5 [IBMessageReceiveChannel deliverMessage:toTarget:withArguments:result:] 5. ??? 0x00033fa9 [IBMessageReceiveChannel deliverMessage:toTarget:withArguments:result:] 6. ??? 0x00033c47 [IBMessageReceiveChannel runBlockingReceiveLoopNotifyingQueue:notifyingTarget:] 7. libdispatch.dylib 0x04c3d731 _dispatch_barrier_sync_f_slow_invoke 8. libdispatch.dylib 0x04c4c014 _dispatch_client_callout 9. libdispatch.dylib 0x04c3c7d5 _dispatch_main_queue_callback_4CF 10. CoreFoundation 0x0224aaf5 __CFRunLoopRun 11. CoreFoundation 0x02249f44 CFRunLoopRunSpecific 12. CoreFoundation 0x02249e1b CFRunLoopRunInMode 13. Foundation 0x01308c7c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 14. ??? 0x0000cf06 [IBCocoaTouchTool startServingReceiveChannel:] 15. ??? 0x0000d09f [IBCocoaTouchTool startServingWithSocket:] 16. ??? 0x0000e1b7 [IBCocoaTouchTool .cxx_destruct] 17. ??? 0x00002365 ??? Exception info:{ } 我有同样的问题…当在“Rounded Rect Buttons”的故事板中工作时，它崩溃。 有时用一个或两个button，有时我可以添加十个button，然后崩溃。
编辑：经过一些实验，我没有选中“使用Autolayout”在故事板的“文件检查器”，它的工作原理。 也许你会试试看。
解决方法是从Storyboard剪切并粘贴到.xib。
*对于我来说，当ContainerView被拖拽到canvas上时，它会在IB中使用.xib崩溃。 Xcode版本8.2.1。