title: Can't add UIBarButtonItem to toolbar
body: <p>After going through every single stackoverflow solution for this problem, it's still frustratingly not working for me. </p>
  
  <pre><code>//UIBarButtonItem declaration
  UIBarButtonItem* button1 = [[UIBarButtonItem alloc] initWithTitle:@"Button Text" 
  style:UIBarButtonItemStyleBordered target:self action:@selector(myAction)];
  
  //method 1
  [self setToolbarItems:[NSArray arrayWithObjects: button1, nil] animated:YES];
  
  //method 2
  [self.navigationController.toolbar setItems:[NSArray arrayWithObject:button1]];
  
  //method 3
  self.navigationController.toolbarItems = [NSArray arrayWithObject:button1];
  
  //displaying toolbar
  [self.navigationController setToolbarHidden:NO];
  </code></pre>
  
  <p>None of the above methods work for displaying a button on the toolbar - all I get is a blank toolbar. Is there something obvious I'm missing here?</p>