对于提交的苹果官方的app，在审核的时候会给我们一些crash文件，对于这些有用的文件，里面是关于我们的bug的一些信息，那么该如何去调试呢
第一步：在任意目录创建一个目录，用来调试crash，我这里创建一个crash目录
第二步：将之前Archive的文件copy到crash目录里面
其中包括两个文件.app和.app.dSYM
如果找不到的话可以按照下面的步骤进行
先到Organizer
1，找到提交那个时刻的Archive文件，选中，show in Finder
2，然后到达这里，然后再选中红色区域，会出现3中所示的提示
3，ok显示包内容，然后自己找找吧，肯定会有的
copy就好了
第三步：将symbolicatecrash工具copy到crash目录
找不到这个文件可以去
xcode6.0以前的位置：/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/PrivateFrameworks/DTDeviceKit.framework/Versions/A/Resources
xcode6.0以后的位置：/Applications/Xcode.app/Contents/SharedFrameworks/DTDeviceKitBase.framework/Versions/A/Resources
这里看看，应该就会有了。
第四步：将要调试的crash文件copy到crash目录
这个crash文件，这里是来自苹果官方的，其实有时候也是来自其他的用户的电脑上的。
第五步：通过命令进行测试
“Error: "DEVELOPER_DIR" is not defined at ./symbolicatecrash line 53.
export DEVELOPER_DIR="/Applications/XCode.app/Contents/Developer"
打开终端，转到crash目录
执行如下命令：
./symbolicatecrash ./2013-08-16-035933_DLiPad.crash ./appname.app.dSYM > symbol.crash cat ./symbol.crash
结果如下：
Incident Identifier: 5434D911-E207-4D79-9139-40EA4EA76B45 CrashReporter Key: d11ed3a4adbb0d9ca4d6016e73e439640f95f289 Hardware Model: xxx Process: appname [8158] Path: /var/mobile/Applications/2AB1E8EB-6ECE-44F4-8195-4042339DD359/appname.app/appname Identifier: appname Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2013-08-16 03:59:33.513 +0800 OS Version: iOS 6.1.3 (10B329) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 0 Last Exception Backtrace: 0 CoreFoundation 0x3126029e 0x3119e000 + 795294 1 libobjc.A.dylib 0x3910497a 0x390fc000 + 35194 2 UIKit 0x333f537c 0x33065000 + 3736444 3 UIKit 0x3323758e 0x33065000 + 1910158 4 UIKit 0x330c079c 0x33065000 + 374684 5 UIKit 0x33068c34 0x33065000 + 15412 6 UIKit 0x330686c8 0x33065000 + 14024 7 UIKit 0x33068116 0x33065000 + 12566 8 GraphicsServices 0x34d5c59e 0x34d56000 + 26014 9 GraphicsServices 0x34d5c1ce 0x34d56000 + 25038 10 CoreFoundation 0x3123516e 0x3119e000 + 618862 11 CoreFoundation 0x31235112 0x3119e000 + 618770 12 CoreFoundation 0x31233f94 0x3119e000 + 614292 13 CoreFoundation 0x311a6eb8 0x3119e000 + 36536 14 CoreFoundation 0x311a6d44 0x3119e000 + 36164 15 UIKit 0x330bf480 0x33065000 + 369792 16 UIKit 0x330bc2fc 0x33065000 + 357116 17 appname 0x000cf358 0xce000 + 4952 18 libdyld.dylib 0x3953bb1c 0x3953a000 + 6940 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_kernel.dylib 0x39602350 __pthread_kill + 8 1 libsystem_c.dylib 0x3957911e pthread_kill + 54 2 libsystem_c.dylib 0x395b596e abort + 90 3 libc++abi.dylib 0x38b53d4a abort_message + 70 4 libc++abi.dylib 0x38b50ff4 default_terminate() + 20 5 libobjc.A.dylib 0x39104a74 _objc_terminate() + 144 6 libc++abi.dylib 0x38b51078 safe_handler_caller(void (*)()) + 76 7 libc++abi.dylib 0x38b51110 std::terminate() + 16 8 libc++abi.dylib 0x38b52594 __cxa_rethrow + 84 9 libobjc.A.dylib 0x391049cc objc_exception_rethrow + 8 10 CoreFoundation 0x311a6f1c CFRunLoopRunSpecific + 452 11 CoreFoundation 0x311a6d44 CFRunLoopRunInMode + 100 12 UIKit 0x330bf480 -[UIApplication _run] + 664 13 UIKit 0x330bc2fc UIApplicationMain + 1116 14 appname 0x000cf358 0xce000 + 4952 15 libdyld.dylib 0x3953bb1c start + 0 Thread 1: 0 libsystem_kernel.dylib 0x39602d98 __workq_kernreturn + 8 1 libsystem_c.dylib 0x39550cf6 _pthread_workq_return + 14 2 libsystem_c.dylib 0x39550a12 _pthread_wqthread + 362 3 libsystem_c.dylib 0x395508a0 start_wqthread + 4 Thread 2 name: Dispatch queue: com.apple.libdispatch-manager Thread 2: 0 libsystem_kernel.dylib 0x395f2648 kevent64 + 24 1 libdispatch.dylib 0x39522974 _dispatch_mgr_invoke + 792 2 libdispatch.dylib 0x39522654 _dispatch_mgr_thread$VARIANT$mp + 32 Thread 3: 0 libsystem_kernel.dylib 0x39602d98 __workq_kernreturn + 8 1 libsystem_c.dylib 0x39550cf6 _pthread_workq_return + 14 2 libsystem_c.dylib 0x39550a12 _pthread_wqthread + 362 3 libsystem_c.dylib 0x395508a0 start_wqthread + 4 Thread 4 name: WebThread Thread 4: 0 libsystem_kernel.dylib 0x395f1eb4 mach_msg_trap + 20 1 libsystem_kernel.dylib 0x395f2048 mach_msg + 36 2 CoreFoundation 0x31235040 __CFRunLoopServiceMachPort + 124 3 CoreFoundation 0x31233d9e __CFRunLoopRun + 878 4 CoreFoundation 0x311a6eb8 CFRunLoopRunSpecific + 352 5 CoreFoundation 0x311a6d44 CFRunLoopRunInMode + 100 6 WebCore 0x37196500 RunWebThread(void*) + 440 7 libsystem_c.dylib 0x3955b30e _pthread_start + 306 8 libsystem_c.dylib 0x3955b1d4 thread_start + 4 Thread 0 crashed with ARM Thread State (32-bit): r0: 0x00000000 r1: 0x00000000 r2: 0x00000000 r3: 0x3b0f8534 r4: 0x00000006 r5: 0x3b0f8b88 r6: 0x1d844f24 r7: 0x2fd329f4 r8: 0x1d844f00 r9: 0x00000300 r10: 0x334de04b r11: 0x1c535350 ip: 0x00000148 sp: 0x2fd329e8 lr: 0x39579123 pc: 0x39602350 cpsr: 0x00000010 ......
再执行如下命令：
dwarfdump --lookup 0x000cf358 --arch armv7 appname.app.dSYM/
关键是在这里 0x000cf358 ，他是来自这里的
0 libsystem_kernel.dylib 0x39602350 __pthread_kill + 8 1 libsystem_c.dylib 0x3957911e pthread_kill + 54 2 libsystem_c.dylib 0x395b596e abort + 90 3 libc++abi.dylib 0x38b53d4a abort_message + 70 4 libc++abi.dylib 0x38b50ff4 default_terminate() + 20 5 libobjc.A.dylib 0x39104a74 _objc_terminate() + 144 6 libc++abi.dylib 0x38b51078 safe_handler_caller(void (*)()) + 76 7 libc++abi.dylib 0x38b51110 std::terminate() + 16 8 libc++abi.dylib 0x38b52594 __cxa_rethrow + 84 9 libobjc.A.dylib 0x391049cc objc_exception_rethrow + 8 10 CoreFoundation 0x311a6f1c CFRunLoopRunSpecific + 452 11 CoreFoundation 0x311a6d44 CFRunLoopRunInMode + 100 12 UIKit 0x330bf480 -[UIApplication _run] + 664 13 UIKit 0x330bc2fc UIApplicationMain + 1116 14 应用的名称 0x000cf358 0xce000 + 4952 15 libdyld.dylib 0x3953bb1c start + 0
结果如下：
File: appname.app.dSYM/Contents/Resources/DWARF/appname (armv7) ---------------------------------------------------------------------- Looking up address: 0x00000000000cf358 in .debug_info... found! 0x0015d390: Compile Unit: length = 0x00001fc6 version = 0x0002 abbr_offset = 0x00000000 addr_size = 0x04 (next CU at 0x0015f35a) 0x0015d39b: TAG_compile_unit [1] * AT_producer( "Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)" ) AT_language( DW_LANG_ObjC ) AT_name( "/Users/zhy/Downloads/ios/vlink_app_xunyi/xunYi7/library/ASIHttpRequest/ASIDownloadCache.m" ) AT_low_pc( 0x000ccfc0 ) AT_stmt_list( 0x0002cf0b ) AT_comp_dir( "/Users/zhy/Downloads/ios/vlink_app_xunyi" ) AT_APPLE_major_runtime_vers( 0x02 ) 0x0015dd38: TAG_subprogram [53] * AT_name( "-[ASIDownloadCache isCachedDataCurrentForRequest:]" ) AT_decl_file( "/Users/zhy/Downloads/ios/vlink_app_xunyi/xunYi7/library/ASIHttpRequest/ASIDownloadCache.m" ) AT_decl_line( 315 ) AT_prototyped( 0x01 ) AT_type( {0x0015d490} ( BOOL ) ) AT_APPLE_isa( 0x01 ) AT_low_pc( 0x000cf278 ) AT_high_pc( 0x000cf9e2 ) AT_frame_base( r7 ) AT_object_pointer( {0x0015dd54} ) 0x0015dd86: TAG_lexical_block [10] * AT_low_pc( 0x000cf2ca ) AT_high_pc( 0x000cf9de ) Line table dir : '/Users/zhy/Downloads/ios/vlink_app_xunyi/xunYi7/library/ASIHttpRequest' Line table file: 'ASIDownloadCache.m' line 320, column 3 with start address 0x00000000000cf340 Looking up address: 0x00000000000cf358 in .debug_frame... found! 0x00007290: FDE length: 0x0000000c CIE_pointer: 0x00000000 start_addr: 0x000cf278 -[ASIDownloadCache isCachedDataCurrentForRequest:] range_size: 0x0000076a (end_addr = 0x000cf9e2) Instructions: 0x000cf278: CFA=4294967295+4294967295
到这里就知道问题所在了吧
Line table dir : '/Users/zhy/Downloads/ios/vlink_app_xunyi/xunYi7/library/ASIHttpRequest' Line table file: 'ASIDownloadCache.m' line 320, column 3 with start address 0x00000000000cf340
如果有多个crash文件的话，可以重复操作一遍就好了。