title: Add rows in table View with switch control like reminders app
body: <p>In the Apple reminders App, and in the details screen of a remind,
  when you switch on the control <strong>"Remind me at a location"</strong>, a row <strong>"Location"</strong> is added (in fact a table view cell).
  I would like to do the same in one of my application, when a switch control is actived 2 cells are added... how can i do this?
  Thank you for your help</p>