要求用户在iPhone上崩溃后发送崩溃日志
问题描述：
某些应用程序会询问用户是否希望在崩溃后重新启动时通过电子邮件发送崩溃日志。
Some application ask the user if they want to send the crash log by email when they restart after a crash. How are they doing that ?
他们必须记录日志，当他们崩溃并读取这个文件，并要求用户发送它，如果它不是空的？
They have to record the log when they crashing and reads this file and ask the user to send it if it's not empty ?
有没有一个框架或者一个开源项目，我可以整合来做这个？
Is there a framework or an open source project I can integrate to do this ?