title: How can I show a UIAlert straight after cell selection & end it after the new UIView is shown?
body: <p>In my iPhone app how could I create a UIAlert (or some other indicator) that highlights to the user that the data is loading such that:</p>
  
  <ol>
  <li>starts as soon as the user selects a cell in UITableViewController A, and</li>
  <li>ends after UITableViewController B is actually displayed</li>
  </ol>
  
  <p>The rough flow I have would be then:</p>
  
  <ul>
  <li>Controller A
  <ul>
  <li>User selects row</li>
  <li>Alert starts</li>
  <li>Data loaded in preparation for controller B</li>
  </ul></li>
  <li>Controller B
  <ul>
  <li>in say viewDidLoad turn off the loading indicator</li>
  </ul></li>
  </ul>
  
  <p>Need to find a way to do this such that the "loading" indicator used is actually displayed on the current view straight away...</p>