title: iOS - show modal popover view controller over splitviewcontroller at startup
body: <p>I'm working on an iPad app which requires a login screen.  I'd like the login screen to appear as a modal popover in the centre of the screen, over the top of the underlying screen which is controlled by a UISplitViewController.  Ideally I'd like the 'master' view to be hidden and then appear after a successful login.  I understand my UISplitViewController has to be the root controller, so I need to launch the popover from either the master or detail view at an appropriate event.  I'm a bit stuck as to where this should happen, and whether the UIPopoverController should be a property of the master or detail views.  </p>
  
  <p>Any help greatly appreciated,</p>
  
  <p>Jonathan</p>