title: Game Center Stuck in invitation
body: <p>I am developing <code>cocos2dx</code> game for <code>iOS</code>, i have integrated the <code>Game Center</code> but when i send invitation to friend the sender did not recive the response that receiver accepted the request or not none of delegate method is calling. I have tried all the solutions but nothing is working further i can share the code if there is anything wrong with it:</p>
  
  <pre><code>GKMatchRequest *request = [[GKMatchRequest alloc] init];
  request.minPlayers = minPlayers;
  request.maxPlayers = maxPlayers;
  request.inviteMessage = @"Your Custom Invitation Message Here";
  
  request.inviteeResponseHandler = ^(NSString *playerID, GKInviteeResponse response)
  {
      if (response == GKInviteeResponseAccepted)
      {
          NSLog(@"DEBUG: Player Accepted: %@", playerID);
          // Tell the infrastructure we are don matching and will start using the match
      }
  };
  
  [[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)
  {
  
  
      switch (response) {
          case GKInviteeResponseAccepted:
          {
          }
              break;
          case GKInviteeResponseDeclined:
          {
  
          }
              break;
          case GKInviteeResponseFailed:
          {
  
          }
              break;
          case GKInviteeResponseIncompatible:
          {
  
          }
              break;
          case GKInviteeResponseUnableToConnect:
          {
  
  
          }
              break;
          case GKInviteeResponseNoAnswer:
          {
  
  
          }
              break;
  
          default:
              break;
      }
  
  };
  
  GKMatchmakerViewController *mmvc =
      [[GKMatchmakerViewController alloc] initWithMatchRequest:request];
  mmvc.matchmakerDelegate = self;
  
  [viewController presentViewController:mmvc animated:YES completion:nil];
  </code></pre>