函数'FBSDK_NOT_DESIGNATED_INITIALIZER'的隐式声明在C99 Expected'）'中无效
我正在使用适用于iOS 4.6.0的Facebook SDK，而今天在将cocoapods更新为0.38.2后遇到上述错误。我不确定这个错误与cocoapods有什么关系。
I'm using Facebook SDK for iOS 4.6.0 and just today above error encountered after updating cocoapods to 0.38.2. I'm not sure this error has anything to do with cocoapods.
错误截图：
Error screenshot:
我遇到了同样的问题。出现问题的原因是，我连接了 ParseFacebookUtils （正在加载 Facebook-iOS-SDK （这是已弃用的版本）和 FBSDKCoreKit 分开。
I had the same issue. The problem appeared because, I was connecting both "ParseFacebookUtils" (which was loading "Facebook-iOS-SDK" (which is the deprecated version) and "FBSDKCoreKit" separately.
Facebook-iOS-SDK 和 FBSDKCoreKit 都有 FBSDKMacros.h 具有不同的声明 FBSDK_NOT_DESIGNATED_INITIALIZER ，这就是XCode中的消息出现的原因。
"Facebook-iOS-SDK" and "FBSDKCoreKit" both have "FBSDKMacros.h" which has different declarations of "FBSDK_NOT_DESIGNATED_INITIALIZER" and that is why message in XCode appear.
我建议，如果 ParseFacebookUtils 不在您的podfile列表中，请检查哪个cocoaPod加载 Facebook-iOS-SDK 并尝试使用更新版本的更新版本那个框架。
What I suggest, if "ParseFacebookUtils" is not in your podfile list, check which cocoaPod loading "Facebook-iOS-SDK" and try to update it with the newer version of that framework.
如果你的情况是 ParseFacebookUtils 而不是轻易地将其更改为' ParseFacebookUtilsV4 '
If "ParseFacebookUtils" is your case than easily change it to 'ParseFacebookUtilsV4'
当然不要忘记运行' pod update '以激活所有更改
And surely don't forget to run 'pod update' to make all changes active
希望这会有所帮助。