iOS: Facebook SDK 3.0 (beta) - access user's information

The new Facebook SDK for iOS has a convenient way to access user information via the FBGraphUser protocol in a nice "dot-syntax" manner. However, because the FBGraphUser protocol doesn't have an email @property, we can't access all the information like we do with the name (see example below). Nevertheless, as with the previous SDK, the NSDictionary still contains the email kv-pair and other user information, which is not populated via the FBGraphUser protocol and we can access it like we would have done it with a normal NSDictionary (since it still is just a normal NSDictionary).

if (FBSession.activeSession.isOpen) {
    [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary *user, NSError *error) {
         if (!error) {
             self.nameLabel.text = user.name;
             self.emailLabel.text = [user objectForKey:@"email"];
         }
     }];
}

Also, don't forget to ask for the email permission when opening the FB session:

NSArray *permissions = [[NSArray alloc] initWithObjects:@"email", nil];
[FBSession sessionOpenWithPermissions:permissions completionHandler:
 ^(FBSession *session, FBSessionState state, NSError *error) {
     [self facebookSessionStateChanged:session state:state error:error];
 }];

Source: stackoverflow.com