Game Center achievements question

[cfullerNY]

Hi all,

I am looking into implementing achievements in my current project. I have done some research and discovered the following:

In the popular iOS game “Fruit Ninja”, if the user is not logged into Game Center and they unlock an achievement, they are still notified via a small pop down message at the top of the screen.

Their list of achievements in Game Center updates to reflect this offline progress next time they log in, and there is no way to view the list until they log in.

It is interesting to note that if the user then logs out of their currently signed in Game Center ID and logs in with a different Game Center ID, they will instantly be awarded all of the achievements that have been unlocked on the device they are using (regardless of wether they were unlocked online or offline). This implies at least with Fruit Ninja, that the concept of which achievements have been unlocked is saved and then transmitted to Game Center rather than directly tied to it.

Is this a Game Center flaw on Apples part, or specific to Fruit Ninja?

[Francois]

I think you should store the acheivements in an INI file, and when the user connects again, send them to Apple.