Game Center Multiplayer using GKMatch but seems can't be connected

Question

Hi I'm a new bie in Game Center for iOS. I'm trying to add the multiplayer feature using matches to my game and following the documentation.

So far I reached a point where 2 of my clients can successfully get a match, i.e. the matchmakerViewController:didFindMatch callback is called and a GKMatch object is delivered.

However after that I seems to be stuck there forever, because according to the documentation, I'll have to wait until all the players (2 in my case) are actually connected before starting my game. But it seems the match:player:didChangeState callback is never called to indicate a successful connection. Well, I'm sure my clients are all in the same wifi network ( or is it a must?) Could any one enlighten me on this case? Do I have to do any extra things to make the clients to connect? Thanks a lot for the help!

Answer 1

So I was running into this and the solution (for me) was somewhat embarrasing. I had copied and pasted a bunch of the code from the Apple docs..and they left out an obvious step. They never actually set the match's delegate!

My code now is:

- (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindMatch:(GKMatch *)match {
[self dismissModalViewControllerAnimated:YES];
self.myMatch = match; // Use a retaining property to retain the match.
self.myMatch.delegate = self;  // THIS LINE WAS MISSING IN THE APPLE DOCS.  DOH.
// Start the game using the match.
NSLog(@"Match started! Expected Player Count:%d  %@",match.expectedPlayerCount, match.playerIDs);}

Once I actually set the match delegate, the functions get called. Doh.