Hoping someone can confirm or refute the fact that it appears that achievements don't show when they are achieved. When run on an iOS 6 device the achievement shows up but when run on the iOS 7 it doesn't show up.
Using showsCompletionBanner
set to YES
. https://developer.apple.com/library/ios/documentation/GameKit/Reference/GKAchievement_Ref/Reference/Reference.html#//apple_ref/occ/instp/GKAchievement/showsCompletionBanner
Atm I assume it's a bug in iOS7 and it will be fixed (who knows) so I'm not touching any code.