Objective c 将google api与iphone sdk集成时出错

我正在开发一个cocos2d应用程序，我需要集成youtube API将视频上传到youtube。 我集成了从下载的GDataAPI。并更改了项目设置，如下所示

设置 其他链接器标志： -lxml2

其他C标志： -DDEBUG=1

C语言方言： C99[-std=C99]

增加 标题搜索路径： /usr/include/libxml2 并添加了libxml2.dlyb

但是当我构建项目时，会收到以下错误消息

Undefined symbols for architecture i386:
  "_SCNetworkReachabilityCreateWithName", referenced from:
      -[GDataOAuthSignIn startReachabilityCheck] in GDataOAuthSignIn.o
  "_SCNetworkReachabilitySetCallback", referenced from:
      -[GDataOAuthSignIn startReachabilityCheck] in GDataOAuthSignIn.o
      -[GDataOAuthSignIn stopReachabilityCheck] in GDataOAuthSignIn.o
  "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
      -[GDataOAuthSignIn startReachabilityCheck] in GDataOAuthSignIn.o
  "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
      -[GDataOAuthSignIn stopReachabilityCheck] in GDataOAuthSignIn.o
  "_SecItemCopyMatching", referenced from:
      -[GDataOAuthKeychain passwordForService:account:error:] in GDataOAuthViewControllerTouch.o
  "_SecItemDelete", referenced from:
      -[GDataOAuthKeychain removePasswordForService:account:error:] in GDataOAuthViewControllerTouch.o
  "_SecItemAdd", referenced from:
      -[GDataOAuthKeychain setPassword:forService:account:error:] in GDataOAuthViewControllerTouch.o
  "_kSecAttrAccount", referenced from:
      +[GDataOAuthKeychain keychainQueryForService:account:] in GDataOAuthViewControllerTouch.o
  "_kSecAttrGeneric", referenced from:
      +[GDataOAuthKeychain keychainQueryForService:account:] in GDataOAuthViewControllerTouch.o
  "_kSecAttrService", referenced from:
      +[GDataOAuthKeychain keychainQueryForService:account:] in GDataOAuthViewControllerTouch.o
  "_kSecClass", referenced from:
      +[GDataOAuthKeychain keychainQueryForService:account:] in GDataOAuthViewControllerTouch.o
  "_kSecClassGenericPassword", referenced from:
      +[GDataOAuthKeychain keychainQueryForService:account:] in GDataOAuthViewControllerTouch.o
  "_kSecMatchLimit", referenced from:
      -[GDataOAuthKeychain passwordForService:account:error:] in GDataOAuthViewControllerTouch.o
  "_kSecMatchLimitOne", referenced from:
      -[GDataOAuthKeychain passwordForService:account:error:] in GDataOAuthViewControllerTouch.o
  "_kSecReturnData", referenced from:
      -[GDataOAuthKeychain passwordForService:account:error:] in GDataOAuthViewControllerTouch.o
  "_kSecValueData", referenced from:
      -[GDataOAuthKeychain setPassword:forService:account:error:] in GDataOAuthViewControllerTouch.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

有人知道如何解决这个问题吗

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项目是否需要任何其他设置？

包括此框架

系统配置。框架