Use of unresolved identifier 'AccessToken' when using Facebook Swift SDK

Question

I work with Facebook Swift SDK and I'm trying to check if the user is logged in. I get error message Use of unresolved identifier 'AccessToken'

My code is:

       if let accessToken = AccessToken.current {
            // User is logged in, use 'accessToken' here.

        }

Answer 1

你应该导入FacebookCore：

import FacebookCore

Answer 2

import FBSDKCoreKit
import FBSDKLoginKit