title: UITableViewCell checkmark change on select
body: <p>Am I correct in thinking that to change the checkmark for "on" to "off", I must change the <code>CellAccessoryType</code> between <code>none</code> and <code>checkmark</code> on the <code>didSelectRowAtIndexPath</code>?</p>
  
  <p>Because I have done this but I have noticed the behaviour is not perfectly identical to like the checkmark cells on the auto lock settings on the iphone.</p>
  
  <p>Or is there some other way checkmarks are meant to be handled?</p>