title: How to do CRC32 hashing on a string in objective C
body: <p>as per title, i couldnt find another tutorial on this...</p>
  
  <p>i found a piece of code here: <a href="http://classroomm.com/objective-c/index.php?action=printpage;topic=2891.0" rel="nofollow">http://classroomm.com/objective-c/index.php?action=printpage;topic=2891.0</a></p>
  
  <p>but it is giving me alot of warnings and doesnt really know how to use it.</p>
  
  <p>Any other solution?</p>