There is a new feature in game center, iTunes Connect.It says:
To share leaderboards and achievements of this app with other apps you have provided, move this app to a Game Center group
My question is about datas. I have an app in app store. I will have another app too. If I use this share feature, will my first app leaderboard scores be deleted or do you know anything about this feature
I advise you to review the free WWDC 2012 videos (go to [developer.apple.com]) and select the link for the WWDC 2012 videos. There are various videos that will explain this new feature - I think the video you want was "Session 508 - What's New in Game Center".
The videos "Session 500 - Game Technologies Kickoff" and "Session 521 - Building Game Center Games for OS X" may also be of interest. 1