title: Is this fancy iOS login dialog a standard component?
body: <p>The modal dialog for adding iCloud accounts on iOS 7 is shown below. Is this type of dialog a standard iOS component of some kind? Specific elements of interest are the navigation bar and title on top that seem well integrated with the general iOS UI. I'm obviously looking to avoid reinventing the wheel for my own generic login dialog.</p>
  
  <p><img src="https://i.stack.imgur.com/vbIfZ.png" alt="iCloud login dialog"></p>