Xcode: How do I end a 2 player turn based multiplayer match with a winner and loser using GameCenter? - objective-c

Question

I've had a bit of trouble finding any information on this and all the code samples I come across are based on the match ending in a tie for all players. In my 2 player turn based game I want to be able to end the match with a winner and loser. With the below code I've written the match always ends with the same result for both players, if its a win then both player 1 and 2 win, if its a loss both player 1 and 2 loose... any help? Thank you.
if (gameOver == true) {
if (GameWinner == 0) {
GKTurnBasedParticipant *player0 = [currentMatch.participants objectAtIndex:0];
player0.matchOutcome = GKTurnBasedMatchOutcomeWon;
GKTurnBasedParticipant *player1 = [currentMatch.participants objectAtIndex:1];
player1.matchOutcome = GKTurnBasedMatchOutcomeLost;
[currentMatch endMatchInTurnWithMatchData:data completionHandler:^(NSError *error) {
if (error) {
NSLog(#"%#", error);
}
}];
testlabel.text = #"Player 1 Wins!";
} else if (GameWinner == 1) {
GKTurnBasedParticipant *player0 = [currentMatch.participants objectAtIndex:0];
player0.matchOutcome = GKTurnBasedMatchOutcomeLost;
GKTurnBasedParticipant *player1 = [currentMatch.participants objectAtIndex:1];
player1.matchOutcome = GKTurnBasedMatchOutcomeWon;
[currentMatch endMatchInTurnWithMatchData:data completionHandler:^(NSError *error) {
if (error) {
NSLog(#"%#", error);
}
}];
testlabel.text = #"Player 2 Wins!";
} else if (GameWinner == 2) {
for (GKTurnBasedParticipant *part in currentMatch.participants) {
part.matchOutcome = GKTurnBasedMatchOutcomeTied;
}
[currentMatch endMatchInTurnWithMatchData:data completionHandler:^(NSError *error) {
if (error) {
NSLog(#"%#", error);
}
}];
testlabel.text = #"Tie Game!";
} else {
testlabel.text = #"Your turn is over.";
}

Answer 1

This sounds similar to this SO Question, try:
GKTurnBasedParticipant *curr = currentMatch.currentParticipant;
NSUInteger currentIndex = [currentMatch.participants indexOfObject:currentMatch.currentParticipant];
NSUInteger nextIndex = (currentIndex + 1) % [currentMatch.participants count];
GKTurnBasedParticipant *next = [currentMatch.participants objectAtIndex:nextIndex];
if (currScore < otherScore)
{
// Curr player lost
curr.matchOutcome = GKTurnBasedMatchOutcomeLost;
next.matchOutcome = GKTurnBasedMatchOutcomeWon;
}
else if (currScore == otherScore)
{
// Tied
curr.matchOutcome = GKTurnBasedMatchOutcomeTied;
next.matchOutcome = GKTurnBasedMatchOutcomeTied;
}
else
{
// Won
curr.matchOutcome = GKTurnBasedMatchOutcomeWon;
next.matchOutcome = GKTurnBasedMatchOutcomeLost;
}