架构i386的未定义符号：“_ OBJC_CLASS _ $ _ GDataDateTime”，引自：

Question

我曾在Google日历中工作过。现在我从这个链接下载示例代码：

"http://code.google.com/p/iphone-gcal/". 

但是在这段代码中，缺少一些Gdata代码。所以我已经实现了该代码，但我也得到了以下错误。请一些人帮我解决这个错误。

Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_GDataDateTime", referenced from:
      objc-class-ref in RootViewController.o
      objc-class-ref in EditingViewController.o
  "_OBJC_CLASS_$_GDataEntryCalendarEvent", referenced from:
      objc-class-ref in EditingViewController.o
  "_OBJC_CLASS_$_GDataQueryCalendar", referenced from:
      objc-class-ref in RootViewController.o
  "_OBJC_CLASS_$_GDataServiceGoogleCalendar", referenced from:
      objc-class-ref in RootViewController.o
  "_OBJC_CLASS_$_GDataWhen", referenced from:
      objc-class-ref in RootViewController.o
      objc-class-ref in EditingViewController.o
  "_OBJC_CLASS_$_GDataWhere", referenced from:
      objc-class-ref in EditingViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

您需要将gdata .m文件（GDataDateTime.m，GDataEntryCalendarEvent.m等）添加到目标的“编译源”构建阶段。

执行此操作的一种方法是使用文件检查器。有关动画示例，请参阅this answer。