title: Cocoa/Cocoa.h file not found
body: <p>I am using <code>XMPPFramework</code> in my application. I have imported the Cocoa/Cocoa.h in my .m file. But when i build the project <code>Xcode</code> shows an error. </p>
  
  <blockquote>
    <p>error: "Cocoa/Cocoa.h file not found". </p>
  </blockquote>
  
  <p>How can i solve this Error?</p>