今天做百度地图的时候第一次发现下面错误：
问题：Apple LLVM compiler 3.0 error file "BMKPointAnnotation.h" has been modified since the precompiled header was built
(原因：预编译头的时候文件被修改)；
解决方法：1.Select Product > Clean from the
Xcode menu
2.
快捷键shift+command+k；clean一下
IOS开发 xcode报错之has been modified since the precompiled header was built
原文：http://www.cnblogs.com/someonelikeyou/p/3522044.html