title: Objective-C: How to extract part of a String (e.g. start with '#')
body: <p>I have a string as shown below,</p>
  
  <pre><code>NSString * aString = @"This is the #substring1 and #subString2 I want";
  </code></pre>
  
  <p>How can I select only the text starting with '#' (and ends with a space), in this case 'subString1' and 'subString2'?</p>
  
  <p>Note: Question was edited for clarity</p>