title: duplicate symbols for architecture i386 and couldn't find same name of Class and file
body: <p>When I compiled my iPhone app with Xcode 4.6, I see a strange error code:</p>
  
  <blockquote>
    <p>"duplicate symbols for architecture i386".</p>
  </blockquote>
  
  <p>I know this issue about duplication of file name or class name. so I tried to find the file by using the search bar in Finder.  I also tried to search for duplicated classes with the search bar in Xcode, however I could't find it.  I already checked that I'm not importing .m files.</p>
  
  <p>What should I do next? please give any advice.</p>