title: ios: [tableView reloadData]
body: <p>Is <code>[tableView reloadData]</code> affects perfomance in ios? What is <code>[tableView reloadData]</code>? How it is reloading the tableview? Is there any other way to reload tableview?</p>
  
  <p>I want to add some rows to the end of the tableview. How can i do this?</p>
  
  <p>What is the difference between </p>
  
  <pre><code>[self.tableView reloadData] 
  </code></pre>
  
  <p>and</p>
  
  <pre><code>[self.tableView beginUpdates];
  [self.tableView insertRowsAtIndexPaths:insertIndexPathswithRowAnimation:UITableViewRowAnimationAutomatic];
  [self.tableView endUpdates];
  </code></pre>