title: How to update superview UILabel text from subview in iPhone?
body: <p>I have two class, <strong>Client_Main</strong> and <strong>Client_demo</strong>.<br>
  In <strong>Client_Main</strong> class I am using a label which shows <em>client name</em> and after click on a button from <strong>Client_Main</strong> class I have added <strong>Client_demo</strong> class as a <em>subview</em>. Now when I click on a button on <strong>Client_demo</strong> class I want to change the text of <strong>Client_Main</strong> class label.  </p>
  
  <p>So please suggest me how to do this.</p>