title: How to split a NSString based on characters markers?
body: <p>Below is an NSString I am getting from a webservice:</p>
  
  <pre><code>"You invited @testaccount,Peter,richie@ to WonUp $#book$"
  </code></pre>
  
  <p>I need the strings <code>testaccount,Peter,richie</code> into an NSArray, and <code>#book</code> (ie. the part of the string within the <code>$</code> markers) into another NSArray.</p>
  
  <p>How can I achieve this ?</p>