今天做项目出现这个问题：
fatal error: file ‘/Users/kuaileyizhan/Desktop/saving/*****/****/JYOAData.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
IOS开发xcode报错之has been modified since the precompiled header was built
原文：http://blog.csdn.net/klyz1314/article/details/18734643
