twitter login in objective-c

TwitterLogin.m

//follow to following steps to get twitter login 

step1- register your app on twitter dashboard
step 2- add following code in info.plist betbeen <dict> and </dict>
<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>twitterkit-<consumerKey></string>
    </array>
  </dict>
</array>
<key>LSApplicationQueriesSchemes</key>
<array>
    <string>twitter</string>
    <string>twitterauth</string>
</array>

step 3- download twitterkit and extract the zip file . freamwork file from twitterkit from the following url  https://dev.twitter.com/twitterkit/ios/installation

step 4- add the following code in appdelegate .m
#import <TwitterKit/TwitterKit.h>

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
        [[Twitter sharedInstance] startWithConsumerKey:@"" consumerSecret:@""];
        
    }
    return YES;
}

and   the call back url is 

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
        return [[Twitter sharedInstance] application:application openURL:url options:annotation];
}

step 4- add the following code in the button action where you want

change the  burtton type UIButton to TWTRLogInButton

step 5- add following function where the button action occured 

-(void)twiterLogin{
    //twitterkit-N2wrNbNTIGaU2oIstKykH4pyS
    
    [[NSUserDefaults standardUserDefaults]setValue:@"twitter" forKey:@"social"];
    [[Twitter sharedInstance]logInWithCompletion:^(TWTRSession * _Nullable session, NSError * _Nullable error) {
        if(session){
            NSLog(@"twiterLogin function working");
            NSLog(@"signed in as %@", [session userName]);
            
            TWTRAPIClient *client = [TWTRAPIClient clientWithCurrentUser];
            NSURLRequest *request = [client URLRequestWithMethod:@"GET"
                                                             URL:@"https://api.twitter.com/1.1/account/verify_credentials.json"
                                                       parameters:@{@"include_email": @"true", @"skip_status": @"true"}
                                                           error:nil];

            [client sendTwitterRequest:request completion:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
                // NSString* myString;
                // myString = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
                
                NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];
                NSLog(@" result %@",result);
               
                NSString *user_name = [NSString stringWithFormat:@"%@",[result valueForKey:@"name"]];
                NSLog(@"twitter_name %@",user_name);
                
                //screen_name
                NSString *twitter_name = [NSString stringWithFormat:@"%@",[result valueForKey:@"screen_name"]];
                NSLog(@"twitter_name %@",twitter_name);
                
                // [[NSUserDefaults standardUserDefaults]setValue:fb_name forKey:@"user_name"];
                
                NSString *twitter_id = [NSString stringWithFormat:@"%@",[result valueForKey:@"id"]];
                NSLog(@"twitter_id %@",twitter_id);
                //[[NSUserDefaults standardUserDefaults]setValue:fb_id forKey:@"user_id"];
                
                NSString *twitter_email = [NSString stringWithFormat:@"%@",[result valueForKey:@"email"]];
                NSLog(@"twitter_email %@",twitter_email);
                NSString *prifile_url = [NSString stringWithFormat:@"%@",[result valueForKey:@"profile_image_url"]];
                NSLog(@"prifile_url %@",prifile_url);
                
                NSString*type =@"2";
                
                [[NSUserDefaults standardUserDefaults]setValue:@"twitter" forKey:@"social"];
                
                [self sendData:twitter_id :user_name :twitter_name :type];
                
                //[[NSUserDefaults standardUserDefaults]setValue:fb_name forKey:@"user_name"];
            }];
        }else{
            
            NSLog(@"twiterLogin function not working");
            UIAlertController * alert = [UIAlertController
                                         alertControllerWithTitle:@""
                                         message:@"Set up your account in device to get the twitter login"
                                         preferredStyle:UIAlertControllerStyleAlert];
            
            UIAlertAction* fbButton = [UIAlertAction
                                       actionWithTitle:@"OK"
                                       style:UIAlertActionStyleDefault
                                       handler:^(UIAlertAction * action)
                                       {
                                           [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=TWITTER"]];
                                           [[self processHolderView]setHidden:YES];
                                           
                                       }];
            [alert addAction:fbButton];
            [self presentViewController:alert animated:YES completion:nil];
        }
        
        if(error){
            NSLog(@"twiterLogin function not working %@",error.description);
        }
    }];
}


step 6- click the project->info->url type->url scheme and add the following code
twitterkit-Consumer Key 

twitter login by using swift 3.0 in Xcode 8