title: Push a UIBarButtonSystemItemAdd to a different view controller
body: <p>I'm trying to push an add button to a different view controller and I'm not using a storyboard. The button appears but doesn't do anything when clicked. Here's the code I have:</p>
  
  <pre><code>-(void)pushLogin
  {
      [self.navigationController pushViewController:[[AddListingViewController alloc] init]   animated:YES];
  }
  
  - (void)viewDidLoad
  {
      [super viewDidLoad];
  
      self.navigationItem.title = @"Listings";
  
      UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
          initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
                               target:nil
                                    action:@selector(pushLogin)];
      self.navigationItem.rightBarButtonItem = addButton;
  }
  </code></pre>
  
  <p>Any suggestions?</p>