unable to get the access token through [FBSDKAccessToken currentAccessToken] in iphone sdk

Question

I am creating a facebook app. I have implemented the login using class FBSDKLoginManager. At first time when i login the facebook, success block return the FBSDKLogi

Answer 1

You need to call

[[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions]

Before

[FBSDKAccessToken currentAccessToken]