title: Adding buttons to custom navigation bar
body: <p>In my viewDidLoad method I have the following: </p>
  
  <pre><code>navigBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonSystemItemAction target:self action:@selector(btnClicked:)];
  [self.view addSubview:navigBar];
  </code></pre>
  
  <p>The button does not show up at all! What am I missing?</p>