title: Disk space usage for each installed app in ios 8
body: <p>I need to show the each installed application disk space usage in my app like ios 8 Settings-> General -> Usage -> Manage Storage</p>
  
  <p>I have searched here about this. But i didn't get any solution.</p>
  
  <p>Pls suggest me is it possible? If yes, give the API reference link for this. </p>