In my app i'm able to add game center achievements successfully. But i'm not able to reset those achievements. I tried the methods described in the Apple's Game kit tutorial, but still i can't reset once added achievements in the game center.
What have you tried from the Apple's GameKit Tutorials?
This should work regardless of what you use (UIKit, Cocos2d):
Find your authenticate method and call the reset achievements method: i.e
[[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error) {
[GKAchievement resetAchievementsWithCompletionHandler:^(NSError *error) {
NSLog(@"achievements reset");
}];
}];
Don't forget to comment the reset method when you're done, or else you'll be reseting the achievements every time you log in to Game Center. Let me know how it goes.