How to let a user sign in the GameCenter?

How can I let a user sign in the GameCenter?

Thank,

Andrea [import]uid: 63063 topic_id: 35847 reply_id: 335847[/import]

When you call, gameNetwork.init() API call it should prompt the user to login to game center. Of course they can login to game center directly. Typically once they are logged in they stay logged in and the gameNetwork.init() call will show a brief banner welcoming them back.
[import]uid: 199310 topic_id: 35847 reply_id: 142574[/import]

When you call, gameNetwork.init() API call it should prompt the user to login to game center. Of course they can login to game center directly. Typically once they are logged in they stay logged in and the gameNetwork.init() call will show a brief banner welcoming them back.
[import]uid: 199310 topic_id: 35847 reply_id: 142574[/import]