title: Display vertical fractional numbers in UILabel or text view
body: <p>I'm trying to display fractional numbers in an iPhone app, e.g. 12 and 3/81 should be displayed as the number "12" followed by the numerator "3" on top, a horizontal line, and the denominator "81" at the bottom.</p>
  
  <p>I would greatly appreciate if anyone could advise me on how to achieve this. Should I subclass a <code>UILabel</code> and do custom drawing of the fraction, or should I subclass a <code>UITextView</code>?</p>
  
  <p>Is there any sample code somewhere that shows how such custom drawing of <code>UILabel</code> or <code>UITextView</code> can be done?</p>