Cocoapods Error for 'Not found file'

podfile 使用项目管理 (没有用 framework, 用的是 .a)
```
install! 'cocoapods',
:generate_multiple_pod_projects => true,
:incremental_installation => false
```

pod install 之后编译报错如下

通过将 `HandyJSON.h` 移动到 `Pubilc` 下, 可以进行编译, 但是 Archive 的时候还是会报这个错误

The report names the Podfile settings and HandyJSON.h; begin by reproducing the pod install, compile, and Archive failures with that configuration, then inspect the generated project and header placement. Done means the project compiles and archives without manually moving HandyJSON.h to Public.

Written by the indexing model from the issue text.