title: Adding input accessory view to UITextField while keyboard is visible
body: <p>I would like to add an input accessory view to a <code>UITextField</code> while it is the first responder, i.e. showing the keyboard. Apparently, assigning a <code>UIView</code> to the <code>inputAccessoryView</code> property in this state doesn't display this view. I have to first dismiss the keyboard and re-select the <code>UITextField</code>.</p>
  
  <p>Is there a way to add an input accessory view without dismissing and re-selecting?</p>