Comment obtenir des informations d'utilisateur de Facebook SDK dans iOS?

Comment obtenir le nom d'utilisateur lors de la session utilisateur est ouverte.J'ai essayé de l'ouverture d'une session de l'échantillon à partir de Facebook sdk échantillons. si quelqu'un connait la solution merci de m'aider.
Merci à l'avance.

 - (IBAction)buttonClickHandler:(id)sender {
        //get the app delegate so that we can access the session property
        SLAppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];

        //this button's job is to flip-flop the session from open to closed
        if (appDelegate.session.isOpen) {
            //if a user logs out explicitly, we delete any cached token information, and next
            //time they run the applicaiton they will be presented with log in UX again; most
            //users will simply close the app or switch away, without logging out; this will
            //cause the implicit cached-token login to occur on next launch of the application
   //hear i need to fetch user name ?


            [appDelegate.session closeAndClearTokenInformation];

        } else {
            if (appDelegate.session.state != FBSessionStateCreated) {
                //Create a new, logged out session.
                appDelegate.session = [[FBSession alloc] init];
            }

            //if the session isn't open, let's open it now and present the login UX to the user
            [appDelegate.session openWithCompletionHandler:^(FBSession *session,
                                                             FBSessionState status,
                                                             NSError *error) {
                //and here we make sure to update our UX according to the new session state
                [self updateView];
            }];
        }
    }

source d'informationauteur Peer Mohamed Thabib

  1. 32

    Après l'authentification de la connexion, vous pouvez obtenir des informations à partir d'active FBSession comme ci-dessous 

    if (FBSession.activeSession.isOpen) {

    [[FBRequest requestForMe] startWithCompletionHandler:
     ^(FBRequestConnection *connection,
       NSDictionary<FBGraphUser> *user,
       NSError *error) {
         if (!error) {
             NSString *firstName = user.first_name;
             NSString *lastName = user.last_name;
             NSString *facebookId = user.id;
             NSString *email = [user objectForKey:@"email"];
             NSString *imageUrl = [[NSString alloc] initWithFormat: @"http://graph.facebook.com/%@/picture?type=large", facebookId];
         }
     }];
}

    Mise à jour: au Lieu de id utilisation objectID de la propriété, après la publication de la version v3.14.1(12 Mai 2014), le id propriété a été désapprouvée

    NSString *facebookId = user.objectID;
  2. 6

    Salut vous pouvez obtenir les détails de Facebook de l'utilisateur comme:

    - (void)sessionStateChanged:(NSNotification*)notification {
    if ([[FBSession activeSession] isOpen]) {
        [FBRequestConnection
         startForMeWithCompletionHandler:^(FBRequestConnection *connection,
                                           id<FBGraphUser> user,
                                           NSError *error) {
             if (! error) {

                //details of user
                NSLog(@"User details =%@",user);
             }
         }];
    }else {
        [[FBSession activeSession] closeAndClearTokenInformation];
    }
}

    Grâce

  3. 1
    if (!error && state == FBSessionStateOpen){
    NSLog(@"Session opened");
    //Show the user the logged-in UI
     FBRequest* userupdate = [FBRequest requestWithGraphPath:@"me" parameters: [NSMutableDictionary dictionaryWithObject:@"picture.type(large),id,birthday,email,gender,username,name,first_name" forKey:@"fields"] HTTPMethod:@"GET"];
    [drk showWithMessage:nil];
    [userupdate startWithCompletionHandler: ^(FBRequestConnection *connection,
                                          NSDictionary* result,NSError *error)
   {
    NSLog(@"dict = %@",result);
   }];
    return;
}
  4. 1
            FBSDKGraphRequest(graphPath: "me", parameters: nil).startWithCompletionHandler({ (connection, object, error) in
            guard let user = object as? Dictionary<String, NSObject> else {
                alert("facebook sdk gave me trash object \(object)")
                return
            }
            if let error = error {
                alert(error.localizedDescription)
            }
            else {
                if let userID = user["id"] {
                   //gr8t success

                }

            }
        })
  5. -1

    -(void)loginViewFetchedUserInfo:(FBLoginView *)loginView utilisateur:(id)de l'utilisateur {

    NSLog(@"user facebook details:%@",user.objectID);

    }

    Vous pouvez mettre en œuvre cette méthode du délégué.