title: How to pad NSString with spaces?
body: <p>For example, I need the NSString have at least 8 chars....instead of using a loop to add the left pad spaces on this, is there anyway to do it?</p>
  
  <pre><code>Examples:
  
  Input:    |Output:
  Hello     |   Hello
  Bye       |     Bye
  Very Long |Very Long
  abc       |     abc
  </code></pre>