title: Setting File's Owner to a CustomClass or NSObject?
body: <p>I'm very confused about proxy objects especially <code>File's Owner</code>. So far, i've read <a href="http://crazyviraj.blogspot.com/2009/05/cocoa-what-is-files-owner-in-nib.html" rel="nofollow">this</a> to be able to understand the concept of <b>File's Owner</b>. So far, i'm able to understand it in theory.</p>
  
  <p>To understand better, i try to create a <code>CustomCell</code> which is a subclass of <b>UITableViewCell</b> using IB. Then, i created a <b>UITableView</b> to use my <code>CustomCell</code>. So far, i'm able to make it work.</p>
  
  <p>I build this project to observe how <code>File's Owner</code> is used and how it affects .XIB files.   But, it causes more confusion than before. Because, it doesn't make any difference if i set <code>File's owner custom class</code> to <code>CustomCell</code> or just doesn't change the default class. By default,it's <b>NsObject</b>.</p>
  
  <p>So, my question is, in which cases, i need to set my <code>File's owner custom class</code> to a class which is created by me.  Or, it's always supposed to set in default value. Why would i need to change this class ? </p>
  
  <p>I've done my research on Web and SO. But, i didn't find any solution of this question. </p>
  
  <p>Thank you.</p>