函数'FBSDK_NOT_DESIGNATED_INITIALIZER'的隐式声明在C99 Expected'）'中无效

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.I'm using Facebook SDK for iOS 4.6.0 and just t