title: Objective-C parse hex string to integer
body: <p>I would like to know how to parse a hex string, representing a number, in Objective-C. I am willing to use both an objective, or a C-based method, either is fine.</p>
  
  <p>example:</p>
  
  <pre><code>#01FFFFAB
  </code></pre>
  
  <p>should parse into the integer:
      33554347</p>
  
  <p>Any help would be appreciated!</p>