the gamekit over wifi documentation talks about local wifi and that it's built on top of bonjour. Does that mean it does not work over the Internet, locating user/players in a different subnet, different ISP ... etc
If I need to connect to players/users on the Internet in general I assume I need to setup a server, right ?
YES, Game Kit can be used to connect peers over Internet.
BUT in this case your application must respond to peerPickerController:didSelectConnectionType: and handle all your private handshake protocol to discover peers and establish communication. A web service on your server is also required (unless users type in their IP address).
Good luck Sam!
References:
Apple IOS Reference Library, Game Kit Programming Guide.
Sanford University Online Course, iPhone Development, Lecture 17: Bonjour, NSStream, GameKit (see at 48 min 28 sec).
there are two things:
- you can use gamekit to play with local devices using GKsessions
- you can use gamekit to play over the internet using GKmatch
both methods are very similar, but it's not the case of just changing a flag - you will have to write code for each. if you are smart, you can make a small interface which can use both, based on a flag. I've implemented it and it works fine
来源：https://stackoverflow.com/questions/4321222/gamekit-over-the-internet