How to get a Facebook access token on iOS

Question

Using v3.2.1 as of March 20, 2013 of Facebook SDK.

NSString *fbAccessToken = [[[FBSession activeSession] accessTokenData] accessToken];

If you prefer dot syntax,

NSString *fbAccessToken = [FBSession activeSession].accessTokenData.accessToken;

For those using Swift;

var fbAccessToken = FBSession.activeSession().accessTokenData.accessToken

Update for v4.1.0 SDK onwards

Objective-C

NSString *fbAccessToken = [FBSDKAccessToken currentAccessToken].tokenString;

Swift

var fbAccessToken = FBSDKAccessToken.currentAccessToken().tokenString