一般来说，Mac无法直接打开.ips文件，所以获取到.ips文件时，将后缀改为.crash，然后就可以直接浏览了。

• dSYM files store the debug symbols for your app.
• dSYM files will likely change each time your app is compiled (probably every single time due to date stamping), and have nothing to do with the project settings.
• Ideally, your dSYM file shouldn't be tracked in your git repo. Like other binaries that change on building, it's not useful to keep them in source control.
• dSYMs and executables have an embedded UUID which matches. So every time a build is done will cause both to get a new UUID. The consequence is that symbolication only works if the UUID of the binary that caused a crash matches the UUID of the dSYM that is used for symbolication.

所需文件

1. 获取symbolicatecrash工具

路径：/Applications/Xcode.app/Contents/SharedFrameworks/DVTFoundation.framework/Versions/A/Resources/symbolicatecrash

2. 获取.dSYM文件

.ipa的

路径：Xcode>Window>Organizer>Archives>xxx>Show in Finder>xxx.xcarchive>>显示包内容>xxx.app.dSYM

.framework的

路径：xxx.project>Products>xxx.framework>Show in Finder>Release-iphoneos>xxx.dSYM

3. 获取.crash文件

Xcode>Window>Devices and Simulators>选择已连接的真机>View Device Logs>xxxApp>右键导出.crash文件

借助iTunes获取.ips/.crash文件

• OS X: ~/Library/Logs/CrashReporter/MobileDevice/(your iPhone’s name)/(your app name)
• Windows XP: C:\Documents and Settings\Application Data\Apple computer\Logs\CrashReporter\(your iPhone’s name)\(your app name)
• Windows Vista/7+: C:\Users\AppData\Roaming\Apple computer\Logs\CrashReporter\MobileDevice\(your iPhone’s name)\(your app name)

4. 解析.crash文件

终端命令：./symbolicatecrash xxx.crash xxx.dSYM > crash.log

5. 分析.crash文件

• Exception Type: EXC_RESOURCE //这种一般是设备性能太差（内存、CPU），被系统给终结的
• Exception Subtype: WAKEUPS // 系统奔溃分类
• Exception Message: (Limit 150/sec) Observed 346/sec over 300 secs // 异常信息，相当于系统redline
• Exception Note: NON-FATAL CONDITION (this is NOT a crash) // 异常备注，this is NOT a crash，区别于常见的内存操作错误造成的崩溃，这是系统主动terminate的
• Triggered by Thread: 34 // 触发异常/崩溃的线程，很关键，拿到Thread号，然后去找对应thread的堆栈信息，就能很快定位到奔溃原因。
  奔溃线程堆栈

6. 注意事项

• .dSYM的UUID要和.crash的对应上，否则会报错No symbolic information found
• 查看.dSYM的UUID：dwarfdump --uuid xxx.dSYM

• 查看.crash的UUID：

  
  .crash文件
• 指定Xcode环境变量：export DEVELOPER_DIR="/Applications/Xcode.app/Contents/Developer"，然后echo $DEVELOPER_DIR看一下是否已经设置成功了。
  • 注意export DEVELOPER_DIR这种方式是临时的，也就是关闭Terminal后再打开并解析.crash文件时，要重新执行这条命令。
  • 要想“一劳永逸”，就在~/根目录下新建.bash_profile，然后把上面这条命令加进去，然后执行source .bash_profile，重启Terminal，再echo $DEVELOPER_DIR看看是否成功。
• 重要事情说三遍：每次打包后，一定要备份.dSYM，最好是有命名规范app_version_buid.dSYM，例如：WCRLiveCore_1.1.33_18.dSYM
• 自动导出.dSYM文件：cp -r "${BUILD_DIR}/${CONFIGURATION}-iphoneos/${PROJECT_NAME}.framework.dSYM" "${HOME}/Desktop/${PROJECT_NAME}_$(date +"%Y%m%d_%H%M%S").framework.dSYM"