Uniquely identifying an iOS user

Question

I\'d like to create a user account on the server for new users of an app, but I\'d also like to not ask the user to type in anything. Ideally, I\'d like this to be automatic

Answer 1

Today our APP was rejected, becouse of Game Center user identification. It is in App Store Guidelines: https://developer.apple.com/appstore/resources/approval/guidelines.html .

You can not use uniqe Game Center ID in G: format.

The only way now for us is to use iOS6 Facebook integration.

UPDATE: Our new version with automatic FB logon passed review process and is available on App Store ( Slovni Duel ). Uses also inApp subscription linked to FB profile.