title: Friend class in Objective C
body: <p>I am porting cpp code into Objective C.</p>
  
  <p>In <code>cpp</code> we can add a class as <code>friend class</code> to another class and use all its public functions and variables.</p>
  
  <p>I know that <code>Objective C does not support friend class</code> concept. </p>
  
  <p>How do i make a class as a friend to another class in Objective C</p>