how to send invitation to another player using game center? - objective-c

Question

I am new to game centre and I am building multiplayer game. I have different users in my tableview; now I want to send an invite for a match to a specific user. For sending the invitation I am using this code:
GKMatchRequest *request = [[GKMatchRequest alloc] init];
request.minPlayers = 2;
request.maxPlayers = 2;
request.playersToInvite = [[NSArray alloc] initWithObjects:player.playerId, nil];
request.inviteMessage = #"Your Custom Invitation Message Here";
request.inviteeResponseHandler = ^(NSString *playerID, GKInviteeResponse response)
{
[self updateUIForPlayer: playerID accepted: (response == GKInviteeResponseAccepted)];
};
But how to receive that invitation? I think I have to implement a method for this in GameKitHelper class but I am not sure how to handle this.

Answer 1

my teacher helped me with this and i thought to post working code here if anyone stuck here can use this code.
- (void)inviteFriends: (NSArray*) friends
{
GKMatchRequest *request = [[GKMatchRequest alloc] init];
request.minPlayers = 2;
request.maxPlayers = 2;
request.defaultNumberOfPlayers = 2;
request.recipients = friends;
request.inviteMessage = #"Your Custom Invitation Message Here";
[[GKMatchmaker sharedMatchmaker] findMatchForRequest:request withCompletionHandler:^(GKMatch* match, NSError *error) {
if (error)
{
//Invite has not been sent
// //NSLog(#"Invitation has not been sent");
}
else if (match != nil)
{
//whatever you want to do when the receiver accepts the invite
//NSLog(#"Invitation has been sent with match object = %#",match);
}
}];
request.recipientResponseHandler= ^(GKPlayer *player, GKInviteeResponse response)
{
//NSLog(#"response Get From Other User.");
switch (response) {
case GKInviteeResponseAccepted:
{
}
break;
case GKInviteeResponseDeclined:
{
}
break;
case GKInviteeResponseFailed:
{
}
break;
case GKInviteeResponseIncompatible:
{
}
break;
case GKInviteeResponseUnableToConnect:
{
}
break;
case GKInviteeResponseNoAnswer:
{
}
break;
default:
break;
}
};
}