title: Add both UIBarButtonSystemItemAdd and UIBarButtonSystemItemTrash to one side of a Navigation Item or a UISegmentedControl
body: <p>I'd like to have a <code>UIViewController</code> which has an Add and a Trash button both right to the title, either by adding two <code>UIBarButtonItems</code> to the navigation item/bar or by adding them to a <code>UISegmentedControl</code> and then adding the SegmentedControl to the item. Is this possible? If yes, how is it achieved best?</p>