title: Detect URL in NSString
body: <p>I'm currently using a <code>UITextView</code> in a <code>UITableViewCell</code> in order to make links clickable, but this is giving very poor performance.</p>
  
  <p>So I was wondering if it's possible to detect links in a <code>NSString</code> and if there is a link, use the <code>UITextView</code>, otherwise just use a <code>UILabel</code>.</p>