如何在iphone应用程序中检索Twitter用户名？

我们如何检索iPhone用户的Twitter用户名？我可以得到Facebook的用户名。当用户登录到Facebook时，下面的代码给出了整个配置文件。我拆分此响应并获取用户名，即名字和姓氏

- (void)getFacebookProfile {
    NSString *urlString = [NSString stringWithFormat:@"https://graph.facebook.com/me?access_token=%@", [_accessToken stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    NSURL *url = [NSURL URLWithString:urlString];
    ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
    [request setDidFinishSelector:@selector(getFacebookProfileFinished:)];

    [request setDelegate:self];
    [request startAsynchronous];
}

#pragma mark FB Responses

- (void)getFacebookProfileFinished:(ASIHTTPRequest *)request
{
    // Use when fetching text data
    NSString *responseString = [request responseString];
    NSLog(@"Got Facebook Profile: %@", responseString);

    NSMutableDictionary *responseJSON = [responseString JSONValue];   

    NSString *username;
    NSString *firstName = [responseJSON objectForKey:@"first_name"];
    NSString *lastName = [responseJSON objectForKey:@"last_name"];
    if (firstName && lastName) {
        username = [NSString stringWithFormat:@"%@ %@", firstName, lastName];
    } else {
        username = @"mysterious user";
    }
//[[NSUserDefaults standardUserDefaults] setObject:@"username" forKey:@"FB_LOGIN_STATUS"];
[_loginButton setTitle:username forState:UIControlStateNormal];

    [self refresh];    
}

#pragma mark FBFunLoginDialogDelegate

- (void)accessTokenFound:(NSString *)accessToken {
    NSLog(@"Access token found: %@", accessToken);
    self.accessToken = accessToken;

    _loginState = LoginStateLoggedIn;
    [self dismissModalViewControllerAnimated:YES];
    [self getFacebookProfile]; 
    [self refresh];
}

我如何为Twitter实现这一点

#pragma mark SA_OAuthTwitterControllerDelegate
- (void) OAuthTwitterController: (SA_OAuthTwitterController *) controller authenticatedWithUsername: (NSString *) username {
    NSLog(@"Authenicated for %@", username);
    [_btnTwitter setTitle:username forState:UIControlStateNormal];
}

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这是从twitter上检索用户名的代码。谢谢。

但是如何在twitter上获取登录用户的其他信息，如其全名id位置等？？