title: How to rotate UITableViewCellAccessoryDisclosureIndicator?
body: <p>I'm making a <code>UITableView</code> with expandable/collapsable cells for ios app. I put a <code>UITableViewCellAccessoryDisclosureIndicator</code> on these cells but I'd like to make the arrow headed up/down when the cell is expanded/collapsed.</p>
  
  <p>I found that it's possible to make a button with a custom image and change the button according to the state of the cell but it seems dirty to me because I don't need a button there and I have to add 2 images to the project (ok it's not that big but anyway). </p>
  
  <p>So shouldn't it be better to simply rotate the existing  <code>UITableViewCellAccessoryDisclosureIndicator</code> ? and if so how can I do that?</p>