title: Mixing static and dynamic sections in a grouped table view
body: <p>I need a grouped <code>UITableView</code> similar to the one for Twitter accounts in Settings app:</p>
  
  <p><img src="https://i.stack.imgur.com/TGKET.jpg" alt="Twitter accounts"></p>
  
  <p>That is, a sort of form or menu where some of the sections have a beforehand known set of static cells, and some other sections have to be dynamic and allow inserting additional rows the same way the "Add Account" does here. I'm managing the <code>UITableView</code> in a <code>.xib</code> file. For the static cells, I have separated <code>.xib</code> files that I can load within the <code>cellForRowAtIndexPath:</code> method in the view controller.</p>
  
  <p>How should I handle this kind of table? I don´t find any example code. </p>
  
  <p>How the <code>cellForRowAtIndexPath:</code> method should look like? May I need to keep <code>strong</code> properties for the static cells? Would it be better to design each static cell directly within the same <code>.xib</code> file where the table view is, and to set outlets for them? (Though this does not allow to reuse my custom cells design...)</p>
  
  <p>I need some guidelines for achieving this and correctly managing cells and memory. Thanks in advance</p>