分析我的应用程序时出现GData错误

Question

当我运行我的应用程序时，应用程序运行良好; 当我分析我的应用程序时，会出现以下错误。

**Undefined symbols for architecture armv7:
  "_OBJC_CLASS_$_GDataQueryContact", referenced from:
      objc-class-ref in FetchContactFromEmailServer.o
  "_OBJC_CLASS_$_GDataServiceGoogleContact", referenced from:
      objc-class-ref in FetchContactFromEmailServer.o
  "_kGDataGoogleContactThinProjection", referenced from:
      -[FetchContactFromEmailServer contactFeedURL] in FetchContactFromEmailServer.o**

我确定project->build settings->header搜索路径正确，因为App运行良好。