title: Split NSString by number of whitespaces
body: <p>I have an <code>NSString</code> that contains some values separated by an unknown number of whitespace characters. For example:</p>
  
  <pre><code>NSString* line = @"1 2     3";
  </code></pre>
  
  <p>I would like to split the <code>NSString</code> into an <code>NSArray</code> of values like so: <code>{@"1", @"2", @"3"}</code>.</p>