title: How to format time with NSDateFormatter like this HH:mm:ss
body: <p>I have the duration of a song in seconds. </p>
  
  <p>After following calculations, I have the time in hour, minutes and seconds.</p>
  
  <pre><code>int hour = time / 3600;
  int minute = (time / 60) % 60;
  int second = time % 60;
  </code></pre>
  
  <p>I need to show them with this format HH:mm:ss</p>
  
  <p>How can I do that?</p>