title: UILabel can't become first responder and show inputView in UITableView
body: <p>I tried to create a subclass of UILabel called <code>EditableLabel</code> and implemented <code>canBecomeFirstResponder</code>, <code>isUserInteractionEnabled</code>, both of those two methods return <code>YES</code>, in the meantime, I over-write <code>inputView</code> and <code>inputAccessoryView</code> and make them writable.</p>
  
  <p>My problem is that when I tap on the label, the inputView can't be shown on the screen. Anybody know how to implement the subclass of UILabel view and let the inputView shown?</p>
  
  <p>Thank you very much.</p>