Question

In a multiplayer game set up by Game Center API, the game could disconnect if one of the players had to quit unexpectedly for a minute or more. This could happen for example when the player received a phone call. When that happens, and after the player resumed the game, is there a way to automatically reconnect him to the game?

Answer 1

It’s going to depend greatly on if you established the session via p2p Bluetooth/Wifi or over the Internet.

From the GameCenter docs:

Adding Players to an Existing Match
Sometimes you may already have a
match, and just want to add players to
it. For example, if your game requires
four players and a player gets
disconnected, you might want to offer
the option to find a replacement,
instead of aborting the match in
progress.

To do this, you use code similar to
that found in Listing 5-7, but instead
of calling the
findMatchForRequest:withCompletionHandler:,
your application calls the
addPlayersToMatch:matchRequest:completionHandler:
method, adding the match to add the
players to as an additional parameter.

So basically, if you still have a match object, you can reuse it on either end. It’s up to you and your game to figure out what makes the most sense.