Facebook importing details ios - ios

Question

This is the first time i am trying to integrate Facebook into my ios app.
I am trying to import first name, last name and some other details from Facebook. I am able to log in to Facebook but i cannot import the details. I think my code is wrong somewhere and i don't know where!
if (appDelegate.session.isOpen) {
[FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection,
id<FBGraphUser> user,
NSError *error2) {
regdet.firstname = user.first_name;
regdet.lastname = user.last_name;
regdet.email = [user objectForKey:#"email"];
regdet.address1 = [user objectForKey:#"locale"];
regdet.city = [user.location objectForKey:#"name"];
NSLog(#"firstname %#",regdet.firstname);
}];
} 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 *error1) {
[FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection,
id<FBGraphUser> user,
NSError *error2) {
regdet.firstname = user.first_name;
regdet.lastname = user.last_name;
regdet.email = [user objectForKey:#"email"];
regdet.address1 = [user objectForKey:#"locale"];
regdet.city = [user.location objectForKey:#"name"];
NSLog(#"firstname %#",regdet.firstname);
}];
[self performSegueWithIdentifier: #"Facebooksegue" sender: self];
}];
}

Answer 1

Try this
FBLoginView *loginView=[[FBLoginView alloc]init];
loginView.delegate=self;
loginView.readPermissions = #[#"first_name",
#"last_name",
#"location",
#"id",
#"access_token",
#"email"];
NSArray* permissions = [NSArray arrayWithObjects: #"email", nil];
loginView.readPermissions = #[#"email"];
loginView.readPermissions=permissions;
{
[FBSession openActiveSessionWithReadPermissions:Nil allowLoginUI:YES completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
[FBRequestConnection
startForMeWithCompletionHandler:^(FBRequestConnection *connection,
id<FBGraphUser> user1,
NSError *error)
{
if (!error)
{
firstname=user1.first_name;
lastname=user1.last_name;
city=[user1.location objectForKey:#"name"];
email=user1[#"email"];
fbid=user1.id;
[[NSUserDefaults standardUserDefaults]setObject:Loggedin forKey:#"token"];
[[NSUserDefaults standardUserDefaults]synchronize];
}
NSURL *url = [[NSURL alloc]initWithString:[NSString stringWithFormat:#"%#action=currfbuser&email=%#&fb_id=%#",MainURL,email,fbid ]];
NSError *errors;
NSData *data = [NSData dataWithContentsOfURL:url];
NSDictionary *json = (NSDictionary *)[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&errors];
NSString *status = json[#"status"];
user = json[#"user"];
if ([status isEqualToString:#"success"])
{
[self performSegueWithIdentifier: #"LogIN" sender: self];
}
else if (!([fbid isEqualToString:#""]))
{
[self performSegueWithIdentifier: #"Facebooksegue" sender: self];
}
NSLog(#"%#",firstname);
NSLog(#"%#",lastname);
NSLog(#"%#",city);
NSLog(#"%#",email);
NSLog(#"%#",fbid);
}];}];
}

Answer 2

Here is Facebook documentation and example. You need to ask for additional permission.
[FBSession openActiveSessionWithReadPermissions:#[#"basic_info", #"email"]
allowLoginUI:YES
completionHandler:^(FBSession *session,
FBSessionState status,
NSError *error) {
// Respond to session state changes,
// ex: updating the view
}];
Here is Facebook permission keys and description