We're implementing multiplayer using GameKit's realtime match functionality and are seeing a certificate error on certain iOS devices when attempting to call GKMatchRequest. The request fails with the exception: "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “init.gc.apple.com” which could put your confidential information at risk." This only appears to affect a small number of iOS devices, namely: iPad 6 on iOS 14.8 iPad Mini 6th gen iPad Mini 5th gen Other iOS devices and other platforms match without issues. We've tried multiple different wifi networks on these devices (including cellular hotspot) to try to rule out local network issues. Has anyone run into this?

I have saved games being implemented in iCloud via GameKit code in my app. It has been working correctly for months. However, I recently encountered an issue with saved game conflicts. The 'conflict detected' callback of GameKit is being triggered. I am trying to properly handle this, but it's not working. This is what I am currently doing: Receive the callback I am passed 2 saved game instances I chose the instance with the newest modification time stamp I call GameKitLoad with that chosen saved game instance I successfully receive a byte[] of data loaded from the saved game instance I then call GameKitResolveConflicts with the following parameters --- Param 1: the original array of 2 saved game instances --- Param 2: the byte[] received after loading the newest instance --- Param 3: my callback I also verify that the parameters I am passing are non-null, non-zero-length, and have valid data However, I get the following error printed out to my log "The requested operations could not be completed because one or more parameters are invalid." And then my callback is invoked with a 'false' result status. From this point on, all iCloud functions fail and saving / loading is impossible. I am unsure what is wrong, but any assistance is greatly appreciated. Thank you for your time

this GKAccessPoint code fails on macOS. The AccessPoint button appears, but disappears when clicked -- no modal window. works fine on iOS but not macOS. what am i doing wrong? import SwiftUI import GameKit struct AccessPoint: View { var body: some View { ZStack { Color.clear Text("GKAccessPoint") } .onAppear() { GKLocalPlayer.local.authenticateHandler = { viewController, error in GKAccessPoint.shared.isActive = true } } } }

I'm trying to connect two players with each other using GameKit in a very simple game. I want to use GKMatchmaker.shared().findMatch as I don't want to show any GameCenter related view controllers. (to keep it simple) Problem: Even though GameKit creates a match after finding two players, an error occurs that prevents either player from sending any message to the others. Current Situation: The basic code is as follows (based on the docs described here: https://developer.apple.com/documentation/gamekit/finding_multiple_players_for_a_game) print("Requesting multiplayer match") let request = GKMatchRequest() request.minPlayers = 2 request.maxPlayers = 2 request.recipientResponseHandler = {(player: GKPlayer, respnse: GKInviteRecipientResponse) -> Void in print("new player about to join") print(player.alias) print(respnse) } GKMatchmaker.shared().findMatch(for: request, withCompletionHandler: { (match: GKMatch?, error: Error?) -> Void in if error != nil { // Handle the error that occurred finding a match. print("error during matchmaking") print(error as Any) } else if match != nil { guard let match = match else { return } print("connected to \(match.players.count) players") // load the multiplayer data handler let handler = MultiMatchHandler() match.delegate = handler // load the multiplayer service let service = MultiMatchService(match: match) service.sendMessageToAll(text: "Hello from the other side") // finish the match making GKMatchmaker.shared().finishMatchmaking(for: match) // Start the game with the players in the match. self.view?.presentScene(GameScene.newScene(multiplayer: service)) } }) The output of that is Requesting multiplayer match 2022-01-05 01:19:16.554959+0100 Grapefruit[38300:10026027] [Match] cannot set connecting state for players: ( "<GKPlayer: 0x282add280>(alias:... gamePlayerID:... teamPlayerID:... name:... status:(null) friendBiDirectional:0 friendPlayedWith:1 friendPlayedNearby:0 acceptedGameInviteFromThisFriend:0 initiatedGameInviteToThisFriend:0 automatchedTogether:1)" ), as there is no inviteDelegate set yet. The state might directly change to Ready when we set the inviteDelegate later and call sendQueuedStatesAndPackets. 2022-01-05 01:19:16.557002+0100 Grapefruit[38300:10026027] [Match] syncPlayers failed to loadPlayersForLegacyIdentifiers: ( "..." ) connected to 0 players sending text Hello from the other side failed Findings: minPlayers is set to 2. As the completion handler is called this means that at least one more player was found. But the number of players returned in match.players.count is 0 The matcher shows an error saying that cannot set connecting state for players ... as there is no inviteDelegate set yet. I can't find any info about this invite delegate. Actual Question: What is an inviteDelegate? Do I really need to implement such (if yes, then how?)? (I don't think so as the docs state that the match only starts after the invites are accepted). How can I resolve this issue?

wondering if anyone can help clear up an error that i get when calling GKTurnBasedMatch.saveCurrentTurn. this error happens irregularly, but seems to be exacerbated by rapid successive calls to saveCurrentTurn. Error Domain=GKErrorDomain Code=3 "The requested operation could not be completed due to an error communicating with the server." UserInfo={GKServerStatusCode=5002, NSLocalizedDescription=The requested operation could not be completed due to an error communicating with the server., NSUnderlyingError=0x600002e1f480 {Error Domain=GKServerErrorDomain Code=5002 "status = 5002, Unexpected game state version expectedGameStateVersion='d9a7ea8c-f1de-4d35-8607-bc3c9bc1ebda' foundGameStateId='fc0f793d-4b88-4594-9b52-22ce2c1ae4fc' sessionId='1418932146:390cf165-49fc-40fb-aba7-08ff452d8500'" UserInfo={GKServerStatusCode=5002, NSLocalizedFailureReason=status = 5002, Unexpected game state version expectedGameStateVersion='d9a7ea8c-f1de-4d35-8607-bc3c9bc1ebda' foundGameStateId='fc0f793d-4b88-4594-9b52-22ce2c1ae4fc' sessionId='1418932146:390cf165-49fc-40fb-aba7-08ff452d8500'}}} is there a way to avoid this error? here is a unit test that demonstrates the above error -- error happens irregularly but frequently up to 20% of the time. let total:Int = 100 var fail:Int = 0 func test_StressTest_saveCurrentTurn() { guard let match = GKTurnBasedMatch_loadMatches()?.first else { return } for i in 0..<total { GKTurnBasedMatch_saveCurrentTurn(match, Data([UInt8(i)])) } print("failed \(fail) times out of \(total) total") } func GKTurnBasedMatch_saveCurrentTurn(_ match:GKTurnBasedMatch, _ payload:Data) { let expectation = self.expectation(description:"expectation") print("\(Self.self) \(#function)") match.saveCurrentTurn(withMatch:payload) { error in if let error = error { print("\(error)") self.fail += 1 } expectation.fulfill() } wait(for:[expectation], timeout: 5) }

It seems that some people have asked questions before, but I haven't got an answer, so I'd like to ask you a question. Since playerID is deprecated, when I replaced the relevant part with teamPlayerID, it seems that the format of teamPlayerID obtained from the property of localPlayer and the format of teamPlayerID obtained from Players in GKMatch passed by the delegate function didChangeConnectionState are different. For this reason, comparison by ID is not working well. Is this a malfunction of the OS etc.? Or is there another way to link the teamPlayerID obtained from GKMatch with the teamPlayerID obtained from localPlayer? Also, I haven't figured out the cause yet. I received a report that a program using playerID is not running on monterey. Is playerID completely abolished in monterey?

I'm certain this has been asked before, but I do not want to use sks files. I have some very old Cocos2d code that I'm trying to port without a complete rewrite. I would rather programatically move my scene sprites around based on the screensize and do it in Obj-C. It is unclear to me how to do this. I sort of found an answer here: https://stackoverflow.com/questions/43927323/are-spritekit-scene-sks-files-necessary-in-my-project Tried to do something equivalent in Obj-C, but got no where.

GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.recipients = @[ invitePlayer ]; GKMatchmakerViewController *mmvc = [[VCGKMATCHMAKERVIEWCONTROLLER alloc] initWithMatchRequest:request]; [self.parentViewController presentViewController:mmvc animated:YES completion:nil]; Before iOS 15, I can use previous code to present a view and click "Invite and Start" button to invite player to play match, but in iOS 15, the view has 2 buttons "Invite Friends" and "Start Game", both buttons are disabled, and I can't send invite, Does anyone can help me?

in Trying to reinstall an app and it keeps saying I have to have a new developer code

GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer]; localPlayer.authenticateHandler = ^(UIViewController * __nullable viewController, NSError * __nullable error) { // not enter this code !!! }; // not open game center auth page.

What is the support number for Game Center

Hello, I am trying to load a player avatar for a given ID. On the GKPlayer documentation page, it is recommended to use the loadPlayers(forIdentifiers:withCompletionHandler:) method to retrieve GKPlayer objects which can then be used in the loadPhoto(for:withCompletionHandler:) method. However, the documentation for loadPlayers states, that this function is deprecated since iOS 14.5. XCode suggests to use the GKLocalPlayer.loadFriends method (documentation). Anyway, this is not a replacement for loadPlayers since loadFriends, as the name suggests, only loads players from the friends list instead of a global list. It is weird that the GKPlayer docs suggest the use of loadPlayers which is deprecated. Is there a workaround to this? Best regards

Hi, I'm trying to implement the following Fast Start code shown during WWDC 2021 . However, I'm getting an error on the GameSceneViewController line. I've tried this with both a Game and an App template in Xcode 13, but both get hung up here. Can anyone help me make this work? Thank you so much

Hey! My friend and I recently developed an app with leaderboards. We had the scoring system set to higher for testing purposes, leading to me having a score that is relatively unobtainable with the scoring system we launched with. However, when we launched (https://www.example.com/ https://evergreenapk.com/) the leaderboards weren't scrubbed, so my score is way beyond everyone else. My score is the only one affected, so would it be possible to remove my all-time scores and utilize the ones I've earned since our launch? Please let me know!

i'm trying to use exchanges and localization. i'm getting different results on iOS versus on macOS. i have the following line in my Localizable.strings (English) file "emote_message_hello" = "hello"; here's my sendExchange function: gkTurnBasedMatch.sendExchange(to:[opponent],                    data:Data(),                    localizableMessageKey:"emote_message_hello",                    arguments:[],                    timeout:TimeInterval(1)) and here is my receivedExchangeRequest function   func player(_ player:GKPlayer, receivedExchangeRequest exchange:GKTurnBasedExchange, for gkTurnBasedMatch: GKTurnBasedMatch) {     print("\(exchange.message)") } on macOS this outputs "hello". yet the same code on iOS outputs "emote_message_hello". in other words it appears that macOS is automatically localizing the string, while iOS is not. am i doing something wrong or is this a bug?

When I try to retrieveScores from the gamecenter I get the error: "Couldn’t communicate with a helper application." The leaderboard I am trying to get scores from is a recurring leaderboard. Previously I have called LoadLeaderboardIds. I am using Prime31 unity plugin to communicate with GameCenter. Before updating prime31 I had no errors, however I needed to update the plugin to be able to get recurring leaderboards. I asked on the Prime31 forum, but was told that: "That sounds like an internal Apple error. App code cant launch or communicate with helper apps, only Apple's code can do cross-process communication. You'll want to open a bug report directly with Apple." The error happens on the iOS build but I have not tested other platforms yet.

Hello every one, Is there an full example of how to implement loadFriends in objective-c? https://developer.apple.com/documentation/gamekit/gklocalplayer/3726201-loadfriends?language=objc Thanks!