title: How to use Cocoa framework in Apple iOS applicaiton
body: <p>I am developing an iPhone application. In my iPhone application, I am using the <code>view-based</code> application template. Now I want to use the <code>Cocoa</code> framework for using <code>NSOpenPanelController</code> in my iOS application. How do I use the Cocoa framework, and where do I use it in iOS? Can somebody please explain this to me in detail?</p>
  
  <p>When I start a new project in iOS, it will by default add the frameworks <code>UIKit</code> and <code>coreGraphics</code>. But when I started a new <code>Cocoa</code> application, the default frameworks available are <code>Foundation</code>, <code>Cocoa</code> and <code>Appkit</code>.</p>
  
  <p>I dragged the <code>Cocoa</code> framework from the <code>Cocoa</code> application to my ios application. That step is successful, but when I started build and run, then it again asked for <code>AppKit</code> framework. I dragged that one too in the same manner as <code>Cocoa</code>. Then it asked for <code>foundation</code> framework. In both the applications for iOS and Cocoa applications, <code>foundation</code> framework is different. How to do this? Please help.</p>