title: How to create tableview without prototype cell
body: <p>If I don't want to use a prototype cell in my tableview. In <code>cellForRowAtIndexPath</code>, do I still need to supply a cell identifier in code to dequeue a cell?</p>
  
  <p>I have tried this but it throws a run time error when the tableview tries to populate:</p>
  
  <blockquote>
    <p>fatal error: unexpectedly found nil while unwrapping an Optional value</p>
  </blockquote>
  
  <p>It happens on this line:</p>
  
  <pre><code>let cell = tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell 
  </code></pre>
  
  <p>I'm not sure what other line to use for dequeueing a cell.</p>