title: Crashed when deleting a row from UItableview
body: <p>When deleting a row from <strong>Uitableview</strong> using commitEditingStyle, my app crashes with this error.</p>
  
  <blockquote>
    <p>Assertion failure in -[UITableView _endCellAnimationsWithContext:],
    /SourceCache/UIKit_Sim/UIKit-1912.3/UITableView.m:1046 .Terminating
    app due to uncaught exception NSInternalInconsistencyException',
    reason: 'Invalid update: invalid number of rows in section 0. The
    number of rows contained in an existing section after the update (2)
    must be equal to the number of rows contained in that section before
    the update (1), plus or minus the number of rows inserted or deleted
    from that section (0 inserted, 1 deleted) and plus or minus the number
    of rows moved into or out of that section (0 moved in, 0 moved out).</p>
  </blockquote>
  
  <p>This is my code:</p>
  
  <pre><code>- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
      // If row is deleted, remove it from the list.
      if (editingStyle == UITableViewCellEditingStyleDelete) {
        order *OrderObj= [appDelegate.orderArray objectAtIndex:[indexPath row]];
         [appDelegate removeitem:OrderObj];
  
          [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
      }   }
  </code></pre>