title: presenting GTMOAuth2ViewControllerTouch wtih presentViewController:animated:completion
body: <p>I need to open google login viewController as a modal from a existing viewController. That's ok but I don't know how to add a button for closing the modal because I'm not using an UINavigationController. Anybody having this same problem?</p>
  
  <pre><code>GTMOAuth2ViewControllerTouch *viewController;
          viewController = [GTMOAuth2ViewControllerTouch controllerWithScope:GOOGLE_SCOPE_YOUTUBE
                                                                    clientID:GOOGLE_CLIENT_ID
                                                                clientSecret:GOOGLE_CLIENT_SECRET
                                                            keychainItemName:GOOGLE_KEYCHAIN
                                                                    delegate:self
                                                            finishedSelector:finishedSel];
  
          NSDictionary *params = [NSDictionary dictionaryWithObject:@"es" forKey:@"hl"];
          viewController.signIn.additionalAuthorizationParameters = params;
          viewController.signIn.shouldFetchGoogleUserProfile = YES;
          NSString *html = @"&lt;html&gt;&lt;body style=\"font-family:Arial\"&gt;&lt;div style=\"text-align:center;\"&gt;Cargando página para iniciar sesión...&lt;/div&gt;&lt;/body&gt;&lt;/html&gt;";
          viewController.initialHTMLString = html;
          [self presentViewController:viewController animated:NO completion:nil];
  </code></pre>
  
  <p>thanks</p>