Facebook SDK 3.0: how to receive user's e-mail?

Question

In the \"old\" FB iOS SDK I could receive user information via the following:

NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys         


        

Answer 1

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

Because FBGraphUser doesn't have an email @property, we can't access the information like with the name (dot-syntax), however the NSDictionary still has the email kv-pair and we can access it like we would do with a normal NSDictionary.

Don't forget to ask for the email permission though:

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

Answer 2

Did you read the source code of the 3.0 SDK? There is a method that I think is identical:

- (FBRequest*)requestWithMethodName:(NSString *)methodName
                          andParams:(NSMutableDictionary *)params
                      andHttpMethod:(NSString *)httpMethod
                        andDelegate:(id <FBRequestDelegate>)delegate;

Answer 3

from this we can get facebook user's basic info and email id.

[FBSession openActiveSessionWithReadPermissions:@[@"basic_info",@"email"] allowLoginUI:YES completionHandler:^(FBSession *session,FBSessionState status,NSError *error){
        if(error)
        {
            NSLog(@"Facebook Error : %@",error.localizedDescription);
        }
        else{

        }
        // Respond to session state changes,
        // ex: updating the view

    }];

Answer 4

Once you have access to (id<FBGraphUser>)user, you could simply use, user[@"email"].

Answer 5

The easiest method for getting the info after logging in is :

-(IBAction)loginWithFacebook:(id)sender{
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login
 logInWithReadPermissions: @[@"public_profile",@"email"]
 fromViewController:self
 handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
     if (error) {
         NSLog(@"Process error");
     } else if (result.isCancelled) {
         NSLog(@"Cancelled");
     } else {
         NSLog(@"Logged in");
         [self getFacebookProfileInfos];

     }
  }];
}

-(void)getFacebookProfileInfos {
NSDictionary *parameters = @ {@"fields": @"id, name, first_name, last_name, picture.type(large), email"};
if ([FBSDKAccessToken currentAccessToken]) {
    [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:parameters]
     startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
         if (!error) {
             NSLog(@"fetched user:%@", result);
         }
     }];
}

}

You will get all the info the result.