iOS 7 game centre runs on simulator but not device

Question

I'm in the midst of developing an iOS app and I've gotten to the point where it is time to implement some Game Center Leaderboards and Achievements. I followed Apple's programming guide for Game Center and have everything working on both the app-side and the iTunes Connect side including:

• Enabling Game Center in iTunes Connect
• Creating a Game Center enabled app id & provisiong profile
• All needed frameworks have been added to project
• I am a registered apple developer

The problem is when I run the app in the simulator, the game centre user authenticates and everything is fully functional BUT when I install and run the app on any of my devices nothing happens at all! No authentication, no controllers popping up for login or anything! What gives??

Answer 1

The problem seemed to solve itself. I made some adjustments to the app on the iTunes Connect side and everything began to run as expected. Thanks.

Answer 2

I had this same problem and it took me a while to work out what it was. GameKit just reported "The requested operation could not be completed because this application is not recognized by Game Center".

The trick was (for me) on the device to ensure that Game Center was in "Sandbox" mode.

On the device, go to Settings → Game Center. In the "DEVELOPER" section toggle Sandbox. After doing that Game Center worked fine with my app in development.