title: How to get the section header view's title when selecting a Cell
body: <p>I have an <code>UITableView</code> which has many <code>sections</code>, and each section has only 1 row.</p>
  
  <p>What I want to do is that, when I click on a particular cell, the title of the header that corresponds to the cell should be changed.</p>
  
  <p>I have set the section header using <code>-tableView:viewForHeaderInSection:</code></p>
  
  <p>How can I get the row header title inside the <code>-tableView:didSelectRowAtIndexPath:</code> method?</p>