title: Refreshing UItableView Data from a frequently changing NSArray
body: <p>i've a <code>UITableView</code> and I'm reading a data from a web service.
  the data from the web service may change at any time, so i have to refresh my data periodically.</p>
  
  <p>i've managed to refresh the data and store it in an <code>NSArray</code>, but the <code>UITableView</code> won't display those data.</p>
  
  <p>i tried</p>
  
  <pre><code>[myTableView reloadData];
  </code></pre>
  
  <p>but it have no effect.</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>i've implemented all the methods to load the data from an <code>NSArray</code> to the <code>UiTableView</code>.
  this works when the <code>NSArray</code> is initialized in the ViewDidLoad.</p>
  
  <p>but if the <code>NSArray</code> changed while the application is running, the <code>UITableView</code> Will not display those changes.</p>