title: iOS convert large numbers to smaller format
body: <p>How can I convert all numbers that are more than 3 digits down to a 4 digit or less number?</p>
  
  <p>This is exactly what I mean:</p>
  
  <pre><code>10345 = 10.3k
  10012 = 10k
  123546 = 123.5k
  4384324 = 4.3m
  </code></pre>
  
  <p>Rounding is not entirely important, but an added plus. </p>
  
  <p>I have looked into NSNumberFormatter but have not found the proper solution, and I have yet to find a proper solution here on SO. Any help is greatly appreciated, thanks! </p>