我卸载了旧版本的 xcode，然后安装了新版本的 xcode 4.6。在旧的 Xcode 版本 4.5 上，我的项目编译得很好而且很正常。但更新后，我的库中出现错误：
/client/iOS/Additions/Toast+UIView.h:31:9: 'Foundation/Foundation.h' file not found
/client/iOS/AppDelegate.h:10:9: 'UIKit/UIKit.h' file not found
/client/iOS/Additions/OrderedDictionary.h:26:9: 'Foundation/Foundation.h' file not found
/client/iOS/main.m:9:9: 'UIKit/UIKit.h' file not found
/client/iOS/Additions/TSXAdditions.h:10:9: 'Foundation/Foundation.h' file not found
/client/iOS/Controllers/EditorBaseController.h:11:9: 'UIKit/UIKit.h' file not found
/client/iOS/Misc/Reachability.m:48:9: 'sys/socket.h' file not found
我该如何解决？
提前致谢
