CocoaPods中的头文件import导入时不能自动补齐的解决方法

** 下面是stackoverflow上的解决办法: **

Go to the Target > \”Build Settings\” tab and find the \”User Header Search Paths\” setting. Set this to \”$(BUILT_PRODUCTS_DIR)\” and check the \”Recursive\” check box. Now the built target will search the workspace’s shared build directory to locate the linkable header files.

具体来说就是: 选择工程的 Target -> Build Settings 菜单，找到\”User Header Search Paths\”设置项 新增一个值"$(PODS_ROOT)"，并且选择\”recursive\”，这样xcode就会在项目目录中递归搜索文件自动补齐功能马上就好使了。