关于XCode5打开工程闪退的一种解决方案

今天同事遇到一个问题，是关于xcode5打开工程文件一直闪退的问题。后来查看了一下崩溃日志。有如下描述：

xception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Application Specific Information: ProductBuildVersion: 5A1412 ASSERTION FAILURE in /SourceCache/DVTFoundation/DVTFoundation-3532/Framework/Classes/Protocols/DVTInvalidation.m:243 Details: <IDESourceControlCredentialsValidator, 0x7faec5e3c9b0> was never invalidated.

Backtrace for allocation (if _creationBacktrace is set): (null) Object: <IDESourceControlCredentialsValidator: 0x7f86dceeb080> Method: -dealloc Thread: <NSThread: 0x7f86d8414c80>{name = (null), num = 1} Hints: None Backtrace: 0 0x000000010e3a1188 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in IDEKit) 1 0x000000010d137655 _DVTAssertionHandler (in DVTFoundation) 2 0x000000010d137984 _DVTAssertionFailureHandler (in DVTFoundation) 3 0x000000010d20c6a6 _DVTInvalidation_DeallocSuper (in DVTFoundation) 4 0x000000010e33e2a3 -[IDESourceControlSSLAuthenticationWindowController .cxx_destruct] (in IDEKit) 5 0x00007fff8c00bfcc object_cxxDestructFromClass(objc_object*, objc_class*) (in libobjc.A.dylib) 6 0x00007fff8c005922 objc_destructInstance (in libobjc.A.dylib) 7 0x00007fff8c005fa0 object_dispose (in libobjc.A.dylib) 8 0x000000010d161995 __DVTSetupKVODeallocAssertions_block_invoke_371 (in DVTFoundation) 9 0x00007fff865797fa -[NSResponder dealloc] (in AppKit) 10 0x00007fff864af162 -[NSWindowController dealloc] (in AppKit) 11 0x00007fff86623901 -[NSWindowController release] (in AppKit) 12 0x00007fff867595b0 -[NSAutounbinder dealloc] (in AppKit) 13 0x00007fff8c006230 (anonymous namespace)::AutoreleasePoolPage::pop(void*) (in libobjc.A.dylib) 14 0x00007fff87a0cd72 _CFAutoreleasePoolPop (in CoreFoundation) 15 0x00007fff8c52447a -[NSAutoreleasePool drain] (in Foundation) 16 0x00007fff8657a27e -[NSApplication run] (in AppKit) 17 0x00007fff8651ebd6 NSApplicationMain (in AppKit) 18 0x00007fff91f377e1 start (in libdyld.dylib) abort() called Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff903ad212 __pthread_kill + 10 1 libsystem_c.dylib 0x00007fff8a7fcb54 pthread_kill + 90 2 libsystem_c.dylib 0x00007fff8a840dce abort + 143 3 com.apple.dt.IDEKit 0x000000010e3a0a93 +[IDEAssertionHandler _handleAssertionWithLogString:reason:] + 763 4 com.apple.dt.IDEKit 0x000000010e3a12ee -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] + 1117 5 com.apple.dt.DVTFoundation 0x000000010d137655 _DVTAssertionHandler + 421 6 com.apple.dt.DVTFoundation 0x000000010d137984 _DVTAssertionFailureHandler + 322 7 com.apple.dt.DVTFoundation 0x000000010d20c6a6 _DVTInvalidation_DeallocSuper + 480 8 com.apple.dt.IDEKit 0x000000010e33e2a3 -[IDESourceControlSSLAuthenticationWindowController .cxx_destruct] + 94 9 libobjc.A.dylib 0x00007fff8c00bfcc object_cxxDestructFromClass(objc_object*, objc_class*) + 100 10 libobjc.A.dylib 0x00007fff8c005922 objc_destructInstance + 91 11 libobjc.A.dylib 0x00007fff8c005fa0 object_dispose + 22 12 com.apple.dt.DVTFoundation 0x000000010d161995 __DVTSetupKVODeallocAssertions_block_invoke_371 + 264 13 com.apple.AppKit 0x00007fff865797fa -[NSResponder dealloc] + 129 14 com.apple.AppKit 0x00007fff864af162 -[NSWindowController dealloc] + 616 15 com.apple.AppKit 0x00007fff86623901 -[NSWindowController release] + 159 16 com.apple.AppKit 0x00007fff867595b0 -[NSAutounbinder dealloc] + 51 17 libobjc.A.dylib 0x00007fff8c006230 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 464 18 com.apple.CoreFoundation 0x00007fff87a0cd72 _CFAutoreleasePoolPop + 34 19 com.apple.Foundation 0x00007fff8c52447a -[NSAutoreleasePool drain] + 154 20 com.apple.AppKit 0x00007fff8657a27e -[NSApplication run] + 736 21 com.apple.AppKit 0x00007fff8651ebd6 NSApplicationMain + 869 22 libdyld.dylib 0x00007fff91f377e1 start + 1 Thread 1:: Dispatch queue: com.apple.libdispatch-manager 0 libsystem_kernel.dylib 0x00007fff903add16 kevent + 10 1 libdispatch.dylib 0x00007fff8641cdea _dispatch_mgr_invoke + 883 2 libdispatch.dylib 0x00007fff8641c9ee _dispatch_mgr_thread + 54 Thread 2:: com.apple.NSURLConnectionLoader 0 libsystem_kernel.dylib 0x00007fff903ab686 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff903aac42 mach_msg + 70 2 com.apple.CoreFoundation 0x00007fff87a0c233 __CFRunLoopServiceMachPort + 195 3 com.apple.CoreFoundation 0x00007fff87a11916 __CFRunLoopRun + 1078 4 com.apple.CoreFoundation 0x00007fff87a110e2 CFRunLoopRunSpecific + 290 5 com.apple.Foundation 0x00007fff8c501546 +[NSURLConnection(Loader) _resourceLoadLoop:] + 356 6 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 7 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 8 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 3: 0 libsystem_kernel.dylib 0x00007fff903ab686 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff903aac42 mach_msg + 70 2 com.apple.CoreFoundation 0x00007fff87a0c233 __CFRunLoopServiceMachPort + 195 3 com.apple.CoreFoundation 0x00007fff87a11916 __CFRunLoopRun + 1078 4 com.apple.CoreFoundation 0x00007fff87a110e2 CFRunLoopRunSpecific + 290 5 com.apple.DTDeviceKitBase 0x000000011466875a -[DTDKRemoteDeviceDataListener listenerThreadImplementation] + 164 6 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 7 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 8 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 4:: com.apple.CFSocket.private 0 libsystem_kernel.dylib 0x00007fff903ad322 __select + 10 1 com.apple.CoreFoundation 0x00007fff87a50f46 __CFSocketManager + 1302 2 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 3 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 5:: DYMobileDeviceManager 0 libsystem_kernel.dylib 0x00007fff903ab686 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff903aac42 mach_msg + 70 2 com.apple.CoreFoundation 0x00007fff87a0c233 __CFRunLoopServiceMachPort + 195 3 com.apple.CoreFoundation 0x00007fff87a11916 __CFRunLoopRun + 1078 4 com.apple.CoreFoundation 0x00007fff87a110e2 CFRunLoopRunSpecific + 290 5 com.apple.Foundation 0x00007fff8c5647ee -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268 6 com.apple.Foundation 0x00007fff8c4fd1aa -[NSRunLoop(NSRunLoop) run] + 74 7 com.apple.GPUToolsMobileFoundation 0x0000000118afe9bb -[DYMobileDeviceManager _deviceNotificationThread:] + 132 8 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 9 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 10 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 6:: CVDisplayLink 0 libsystem_kernel.dylib 0x00007fff903ad0fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8a7fffe9 _pthread_cond_wait + 869 2 com.apple.CoreVideo 0x00007fff8b5872a1 CVDisplayLink::runIOThread() + 689 3 com.apple.CoreVideo 0x00007fff8b586fd7 startIOThread(void*) + 148 4 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 5 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 7: 0 libsystem_kernel.dylib 0x00007fff903ad0fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8a7fffe9 _pthread_cond_wait + 869 2 com.apple.Xcode.DevToolsCore 0x0000000113436166 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 506 3 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 4 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 5 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 8: 0 libsystem_kernel.dylib 0x00007fff903ad0fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8a7fffe9 _pthread_cond_wait + 869 2 com.apple.Xcode.DevToolsCore 0x0000000113436166 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 506 3 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 4 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 5 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 9: 0 libsystem_kernel.dylib 0x00007fff903ad0fa __psynch_cvwait + 10 1 libsystem_c.dylib 0x00007fff8a7fffe9 _pthread_cond_wait + 869 2 com.apple.Xcode.DevToolsCore 0x0000000113436166 -[XCBlockQueue _processBlocksInThreadSlotNumber:] + 506 3 com.apple.Foundation 0x00007fff8c55f562 __NSThread__main__ + 1345 4 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 5 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 10: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 11: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 12: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 13: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 14: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 15: 0 libsystem_kernel.dylib 0x00007fff903ad6d6 __workq_kernreturn + 10 1 libsystem_c.dylib 0x00007fff8a7fdf4c _pthread_workq_return + 25 2 libsystem_c.dylib 0x00007fff8a7fdd13 _pthread_wqthread + 412 3 libsystem_c.dylib 0x00007fff8a7e81d1 start_wqthread + 13 Thread 16: 0 libsystem_kernel.dylib 0x00007fff903ab686 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff903aac42 mach_msg + 70 2 com.apple.CoreFoundation 0x00007fff87a0c233 __CFRunLoopServiceMachPort + 195 3 com.apple.CoreFoundation 0x00007fff87a11916 __CFRunLoopRun + 1078 4 com.apple.CoreFoundation 0x00007fff87a110e2 CFRunLoopRunSpecific + 290 5 com.apple.DebugSymbols 0x00007fff8728a590 SpotlightQueryThread(void*) + 356 6 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 7 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 17: 0 libsystem_kernel.dylib 0x00007fff903ad386 __semwait_signal + 10 1 libsystem_c.dylib 0x00007fff8a885800 nanosleep + 163 2 com.apple.CoreSymbolication 0x00007fff8fee2358 0x7fff8fecc000 + 90968 3 libsystem_c.dylib 0x00007fff8a7fb7a2 _pthread_start + 327 4 libsystem_c.dylib 0x00007fff8a7e81e1 thread_start + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000006 rcx: 0x00007fff52b72108 rdx: 0x0000000000000000 rdi: 0x0000000000000c07 rsi: 0x0000000000000006 rbp: 0x00007fff52b72130 rsp: 0x00007fff52b72108 r8: 0x00007fff769b7278 r9: 0x0000000000000141 r10: 0x0000000020000000 r11: 0x0000000000000206 r12: 0x00007fff52b72248 r13: 0x000000010ea71680 r14: 0x00007fff769b8180 r15: 0x00007fff52b721f0 rip: 0x00007fff903ad212 rfl: 0x0000000000000206 cr2: 0x00007f86d883a400 Logical CPU: 0

后来直接google了下DVTInvalidation.m。没想到竟然搜到stackoverflow上有人遇到了这个问题。然后就顺利解决这个问题了。

以下就是解决方案：To prevent xCode5 from Crashing follow these steps. Xcdoe > Preferences > Source Control > Uncheck the Enable Source control . 

来自于stackoverflow上的两篇文章：

http://stackoverflow.com/questions/18905900/xcode-5-crashes-xcode-quit-unexpectedly

http://stackoverflow.com/questions/18890986/xcode-5-crashes-with-svn-version-1-7-self-signed-certificate

记录下这个问题的原因是想告诉自己：

1.遇到问题要会分析问题。像xcode的闪退，有崩溃日志存在，那就要去好好分析它的日志。推荐阅读如下文章：http://www.raywenderlich.com/zh-hans/30818/ios%E5%BA%94%E7%94%A8%E5%B4%A9%E6%BA%83%E6%97%A5%E5%BF%97%E6%8F%AD%E7%A7%98

2.如果看不懂问题的话，那怎么办？要会提出问题,把问题的关键点寻找出来,然后寻求帮助。