title: UIButton in UIBarButtonItem not showing up
body: <p>I have the following in my view did load on my table view controller:</p>
  
  <pre><code>UIButton *change_view = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  [change_view setTitle:@"List" forState:UIControlStateNormal];
  [change_view addTarget:self action:@selector(toggleView:) forControlEvents:UIControlEventTouchUpInside];
  UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView: change_view];    
  self.navigationItem.rightBarButtonItem = button;    
  </code></pre>
  
  <p>When I run the program, it doesn't show any title or the rounded rectangle button. However, if I change the type to UIButtonTypeInfoLight, it will show up... so what is the problem?</p>