How to get User Data from Facebook?

I am new in iOS Development, I am trying to do get Details of User from Facebook. Here is my code which i am used but when it called my app is hang. In below code it can not worked when i can not Login with device in Facebook in Setting>Facebook. Please help me for this.

    -(Void)LoginWithFB {
    ACAccountStore *accountStore = [[ACAccountStore alloc] init];
    ACAccountType *facebookAccountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
    SLComposeViewController *vc = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
    id options = @{
               ACFacebookAppIdKey: @"1501842240102594",
               ACFacebookPermissionsKey: @[ @"email"],

               };
    [accountStore requestAccessToAccountsWithType:facebookAccountType
                                      options:options
                                   completion:^(BOOL granted, NSError *error) {
    if (granted)
    {
        // Return back logined facebook Account
        ACAccount *fbAccount = [[accountStore accountsWithAccountType:facebookAccountType] lastObject];

        // Do What you want...
        // Request friend list
        //http://ift.tt/1xwqDQC
        SLRequest *friendsListRequest = [SLRequest requestForServiceType:SLServiceTypeFacebook
                                        requestMethod:SLRequestMethodGET
                                        URL: [[NSURL alloc] initWithString:@"http://ift.tt/P3QvMV"]parameters:nil];
                                        friendsListRequest.account = fbAccount;
                                        [friendsListRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {

        // Parse response JSON
        NSError *jsonError = nil;
        NSDictionary *dictionaryForFacebookData = [NSJSONSerialization JSONObjectWithData:responseData
                                                   options:NSJSONReadingAllowFragments
                                                   error:&jsonError];

        //    NSString *proficePicture = [NSString stringWithFormat:@"http://ift.tt/1xwqDQI"];

            NSMutableDictionary *dictionaryParameter = [[NSMutableDictionary alloc]init];
            [dictionaryParameter setObject:@"facebook" forKey:@"registrationsource"];
            [dictionaryParameter setObject:[dictionaryForFacebookData objectForKey:@"first_name"] forKey:@"firstname"];
            [dictionaryParameter setObject:[dictionaryForFacebookData objectForKey:@"last_name"] forKey:@"lastname"];
            [dictionaryParameter setObject:[dictionaryForFacebookData objectForKey:@"email"] forKey:@"email"];
            [dictionaryParameter setObject:@"yes" forKey:@"status"];

            WebServiceClass *objectToCallApi = [[WebServiceClass alloc]init];
            NSDictionary *dictionaryReturnValue = [objectToCallApi callAPIWebservice:dictionaryParameter stringURL:[[Singelton sharedInstance] passMethodName:@"login"]];
            if (![[dictionaryReturnValue objectForKey:@"success"] isEqualToString:@"1"])
            {
                [UIAlertView showWithTitle:ALERT_TITLE message:[dictionaryReturnValue objectForKey:@"message"] handler:^(UIAlertView *alertview, NSInteger buttonindex){
                }];
            }

            if ([[dictionaryReturnValue objectForKey:@"success"] isEqualToString:@"1"])
            {
                    APP_DELEGATE.intTabbarNumber = 0;
                NSMutableDictionary *data =[[NSMutableDictionary alloc]init];
                [data setObject:[NSString stringWithFormat:@"%@ %@",[dictionaryReturnValue objectForKey:@"firstname"], [dictionaryReturnValue objectForKey:@"lastname"]] forKey:@"fullname"];
                [data setObject:dictionaryReturnValue[@"username"] forKey:@"username"];
                [data setObject:dictionaryReturnValue[@"email"] forKey:@"email"];
                [data setObject:dictionaryReturnValue[@"userid"] forKey:@"userid"];
                 NSMutableArray *arrayOfExistingUser;
                if([[NSUserDefaults standardUserDefaults] valueForKey:@"Users"] != nil)
                {
                    arrayOfExistingUser = [[[NSUserDefaults standardUserDefaults] valueForKey:@"Users"] mutableCopy];
                    for (int i=0; i<arrayOfExistingUser.count; i++)
                    {
                        if ([[[arrayOfExistingUser objectAtIndex:i]objectForKey:@"userid"] isEqualToString:[data objectForKey:@"userid"]])
                        {
                            [arrayOfExistingUser removeObjectAtIndex:i];
                        }
                    }
                }
                else
                {
                    arrayOfExistingUser = [[NSMutableArray alloc]init];
                }

                [arrayOfExistingUser addObject:data];
                [[NSUserDefaults standardUserDefaults] setObject:arrayOfExistingUser forKey:@"Users"];
                [[NSUserDefaults standardUserDefaults] synchronize];

                [[NSUserDefaults standardUserDefaults]setObject:dictionaryReturnValue forKey:@"dictionaryForLoginData"];

                if ([[dictionaryReturnValue objectForKey:@"role"] isEqualToString:@"teacher"])
                {
                    [APP_DELEGATE createTabbarInstanceForTeacher];
                }
                else if ([[dictionaryReturnValue objectForKey:@"role"] isEqualToString:@"student"])
                {
                    [APP_DELEGATE createTabbarInstanceForstudent];
                }
                else if ([[dictionaryReturnValue objectForKey:@"role"] isEqualToString:@"parent"])
                {
                    [APP_DELEGATE createTabbarInstanceForParent];
                }
            }
            }];
            }
    else
    {
        SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [controller.view resignFirstResponder];
        controller.view.hidden = YES;

        [self presentViewController:controller animated:NO completion:nil];
    }
    }];
}