title: UIPickerView column Titles
body: <p>I am looking for a way to add a title to each column (component) of the UIPickerView. In all the examples I've seen there are no titles because in general the columns meaning could be figured out based on its order, content and context... however in my application it would be dangerous to confuse the columns so I need to give them titles.</p>
  
  <p>Regards,
  Craig</p>