In my SceneKit game I'm able to connect two players with GKMatchmakerViewController. Now I want to support the scenario where one of them disconnects and wants to reconnect. I tried to do this with this code: nonisolated public func match(_ match: GKMatch, player: GKPlayer, didChange state: GKPlayerConnectionState) { Task { @MainActor in switch state { case .connected: break case .disconnected, .unknown: let matchRequest = GKMatchRequest() matchRequest.recipients = [player] do { try await GKMatchmaker.shared().addPlayers(to: match, matchRequest: matchRequest) } catch { } @unknown default: break } } } nonisolated public func player(_ player: GKPlayer, didAccept invite: GKInvite) { guard let viewController = GKMatchmakerViewController(invite: invite) else { return } viewController.matchmakerDelegate = self present(viewController) } But after presenting the view controller with GKMatchmakerViewController(invite:), nothing else happens. I would expect matchmakerViewController(_:didFind:) to be called, or how would I get an instance of GKMatch? Here is the code I use to reproduce the issue, and below the reproduction steps. Code Run the attached project on an iPad and a Mac simultaneously. On both devices, tap the ship to connect to GameCenter. Create an automatched match by tapping the rightmost icon on both devices. When the two devices are matched, on iPad close the dialog and tap on the ship to disconnect from GameCenter. Wait some time until the Mac detects the disconnect and automatically sends an invitation to join again. When the notification arrives on the iPad, tap it, then tap the ship to connect to GameCenter again. The iPad receives the call player(_:didAccept:), but nothing else, so there’s no way to get a GKMatch instance again.

Hi, I have a test app with a single "game centre achievement" and I am running it on my iPad and unable to list that achievement with GameCenterManager.shared.loadAchievements The app is still in version 1.0, prepare for submission status, (it is not ready for review submission). Game Center entitlement is added for the app and the achievement is added to the Game Center section of app. However it is marked as NotLive. I am using a sandbox account to login to game centre on the iPad and I can't fetch this achievement. Is it because it is "NotLive". ? How do I test my Game Center achivement on the device without releasing it yet.

GKGameCenterViewController won't turn off. With Core and GameKit from GitHub apple/unityplugins, I succeeded in logging in and displaying GKGameCenterViewController. Other leaderboards and everything work fine, but when I press X on GameCenter to return to the game, nothing happens. I tried debugging by printing logs here and there in the plugin to check, but I didn't get any results. When I press X, I couldn't get any logs or responses. It was like a button with no listener attached. No, it was more like an image. Based on the community posts that said it worked fine before, it seems that the recent GameCenter update was not applied to the plugin, was omitted, or changed, causing a mismatch.

Hi, I tried to save the game progress using the official Apple plugin for Unity but the crash happened when I active the "iCloud Documents" inside capabilities and when deactivated it this error message appeared: Code=27 Domain=GKErrorDomain Description=The requested operation could not be completed because you are not signed in to iCloud or have not enabled iCloud Drive. (UbiquityContainerUnavailable) Authentication with Game Center works fine using the Core plugin, but nothing works correctly when I use the GameKit plugin. Note: I already active iCloud for app Identifier. Tichnecal informations: Unity version: 2022.3.47f1 LTS XCode 16 Swift 6 GameKit-3.0.0 (Apply unity plugin) Core-3.1.5 (Apply unity plugin)

I'm displaying a GKGameCenterViewController after successfully authenticating and on iOS 18.0 and 18.1, I get a black screen. As a sanity check GKLocalPlayer.local.isAuthenticated is also returning true. The same code works just fine on iOS 17. Is there something that needs to be done on iOS 18 and above?

I'm sure this question was asked many times before but I cannot find a good answer. In my case it just doesn't work. Here's what I did Created a couple of test user accounts on appstore connect under the sandbox section. Launched two different simulators via xcode. On each simulator I logged in into test icloud account and game center accordingly. Deployed and launched my code via xcode. What happens is that GameKit code fails to find any peers no matter what I do. Sending Invite doesn't work either because the simulator displays an error message saying "you need to log-in into icloud account first" although it's already logged in. I tried the same code on two different physical devices with two real icloud accounts and it works as expected but it's not a viable path to develop and debug an app. I'm using the latest Xcode 16.1 running on 15.1. Anybody has any clue how to solve this ?

The welcome banner is off the top left side of the screen instead of coming down the center. This behavior is encountered when running my iOS application on macOS.

Updated to GPT 2 with the app format and whisky in October. I'm using steam in GPT to play the windows only games. The games consistently crash my computer to restart when I played games like Liar's Bar and Phasmophobia, the latter even with its performance optimization update released today. Both of them do that when I load into the game room, so the bar/ghost house or even while loading. It ran Outpath properly though, which was something with much lower quality than LB and Phas. I don't think it's a simple RAM config issue because Phasmophobia ran fine for me with older versions in GPT 1 although I did experience occasional crashes but I think those were only crashing the game not my mac. I'm not sure what I'm doing wrong that I can't run those games or if it's a GPT problem. I'm using a MPB Pro M1 with 16GB memory on Sequoia 15.0.1.

Hi there, With a couple of other developers we have been busy with migrating our SpriteKit games and frameworks to Swift 6. There is one issue we are unable to resolve, and this involves the interaction between SpriteKit and GameplayKit. There is a very small demo repo created that clearly demonstrates the issue. It can be found here: https://github.com/AchrafKassioui/GameplayKitExplorer/blob/main/GameplayKitExplorer/Basic.swift The relevant code also pasted here: import SwiftUI import SpriteKit struct BasicView: View { var body: some View { SpriteView(scene: BasicScene()) .ignoresSafeArea() } } #Preview { BasicView() } class BasicScene: SKScene { override func didMove(to view: SKView) { size = view.bounds.size anchorPoint = CGPoint(x: 0.5, y: 0.5) backgroundColor = .gray view.isMultipleTouchEnabled = true let entity = BasicEntity(color: .systemYellow, size: CGSize(width: 100, height: 100)) if let renderComponent = entity.component(ofType: BasicRenderComponent.self) { addChild(renderComponent.sprite) } } } @MainActor class BasicEntity: GKEntity { init(color: SKColor, size: CGSize) { super.init() let renderComponent = BasicRenderComponent(color: color, size: size) addComponent(renderComponent) let animationComponent = BasicAnimationComponent() addComponent(animationComponent) } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } } @MainActor class BasicRenderComponent: GKComponent { let sprite: SKSpriteNode init(color: SKColor, size: CGSize) { self.sprite = SKSpriteNode(texture: nil, color: color, size: size) super.init() } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } } class BasicAnimationComponent: GKComponent { let action1 = SKAction.scale(to: 1.3, duration: 0.07) let action2 = SKAction.scale(to: 1, duration: 0.15) override init() { super.init() } override func didAddToEntity() { if let renderComponent = entity?.component(ofType: BasicRenderComponent.self) { renderComponent.sprite.run(SKAction.repeatForever(SKAction.sequence([action1, action2]))) } } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } } As SKNode is designed to run on the MainActor, the BasicRenderComponent is attributed with MainActor as well. This is needed as this GKComponent is dedicated to encapsulate the node that is rendered to the scene. There is also a BasicAnimationComponent, this GKComponent is responsible for animating the rendered node. Obviously, this is just an example, but when using GameplayKit in combination with SpriteKit it is very common that a GKComponent instance manipulates an SKNode referenced from another GKComponent instance, often done via open func update(deltaTime seconds: TimeInterval) or as in this example, inside didAddToEntity. Now, the problem is that in the above example (but the same goes foupdate(deltaTime seconds: TimeInterval) the methoddidAddToEntity is not isolated to the MainActor, as GKComponent is not either. This leads to the error Call to main actor-isolated instance method 'run' in a synchronous nonisolated context, as indeed the compiler can not infer that didAddToEntity is isolated to the MainActor. Marking BasicAnimationComponent as @MainActor does not help, as this isolation is not propogated back to the superclass inherited methods. In fact, we tried a plethora of other options, but none resolved this issue. How should we proceed with this? As of now, this is really holding us back migrating to Swift 6. Hope someone is able to help out here!

Leaderboard has not worked for past two days. What’s up with that?

I just built Core and GameKit without errors. The command line I used was the following: python3 build.py -p Core GameKit -m macOS -c "Apple Development ID (redacted)" When importing these packages into Unity, as soon as the editor refreshes I get these errors: DllNotFoundException: GameKitWrapper assembly:<unknown assembly> type:<unknown type> member:(null) And DllNotFoundException: AppleCoreNativeMac assembly:<unknown assembly> type:<unknown type> member:(null) And Apple Unity Plug-ins] No Apple native plug-in libraries found. Were the libraries built with the build script (build.py), xcodebuild, or Xcode? Was any output generated from the build script/tool? Were there any errors or issues? Please check to ensure that libraries (.a, .framework, or .bundle files) were created and saved to each plug-in's "NativeLibraries~" folder. I made sure that the libraries were saved to this NativeLibraries folder. I made sure to update xcode, python, npm and Unity to the latest version, got the most recent commity from Github (Sept. 17th) but the errors persist. The errors also occur right as the game starts in a built player. Also occurs in a blank Unity project, where I tested both 2022.3.17f and 2022.3.48f. The versions I was trying to import was Core 3.1.4 and GameKit 3.0.0. Same issue with Core 3.1.3 and Gamekit 2.2.2. Last version I tried that works was Core 1.05 and GameKit 1.04. I haven't seen anyone else encounter this on these forums so I'm guessing that I'm personally doing something wrong rather than there being an issue with the plugins themselves, but what am I doing wrong?

Hello, I’m working with the GameKit API, and I am encountering an issue when submitting a player’s score to a leaderboard at the end of a game. Goal: After submitting the new score to a leaderboard, I want to immediately fetch and display the updated leaderboard that reflects the new score. Problem: After successfully submitting the player’s score, when I fetch the leaderboard, the entries are not updated right away. The fetched leaderboard still shows the outdated player score. Is this delay in updating the leaderboard expected behavior, or am I missing something in my implementation? Steps to Reproduce: Submit the local player’s score to Leaderboard X. On successful submission, fetch the leaderboard entries for Leaderboard X. Expected Result: The fetched leaderboard should reflect the updated player score immediately. Actual Result: The fetched leaderboard shows the outdated score, with no immediate update. As a workaround, I update the leaderboard myself locally, that does the job, but is error-prone and require more efforts.

I have created a turn based game using GameKit. Everything is pretty much done, last thing left to do is the turn time out. I am passing GKTurnTimeoutDefault into the timeout argument in: func endTurn(withNextParticipants nextParticipants: [GKTurnBasedParticipant], turnTimeout timeout: TimeInterval, match matchData: Data) However when I check the .timeoutDate property of the GKTurnBasedParticipant participants, the value is always nil. What am I doing wrong? Am I checking the right property or is there another one instead that I don't know about? I have tried passing different values to the timeout parameter but the timeoutDate is always nil. Has anyone successfully implemented a timeout using GKTurnBasedMatch ?

Hi, I created a leaderboard in my application, and a method to record a new score: GKLeaderboard.loadLeaderboards(IDs: [leaderboardID]) { (leaderboards, error) in if let error = error { print("Error loading leaderboards: \(error.localizedDescription)") } guard let leaderboard = leaderboards?.first else { print("Leaderboard not found") return } leaderboard.submitScore(score, context: 0, player: self.localPlayer) { error in if let error = error { print("Error reporting score: \(error.localizedDescription)") } else { print("Score reported successfully!") } } } } When debuging, this method is correctly called and I have a success, so I tried to test it with an internal TestFlight release. The leaderboard is never updated. Is there a way to perform a test of a leaderboard before publishing the app? I have the same question for achievements: let achievement = GKAchievement(identifier: identifier) achievement.percentComplete = percentComplete GKAchievement.report([achievement]) { error in if let error = error { print("Error reporting achievement: \(error.localizedDescription)") } } } Thanks!

Hello, I would like to know if anyone has or still using the GKVoiceChat capabilities in their apps. I wanted to use it for my online game but I am coming across issues using it and wondering if their are alternatives?. The documentation mentions to use Share-play but that wont be possible with random online players. Any help will be appreciated!.

Hello, I try to invite a friend to play my app , however when the friend try to press invite link component via iMessage, it shows “Retrieving” and then disappear, nothing happens, it doesn't redirect to my app, what I'm missing? or doing wrong I can leave some part of my code import Foundation import GameKit extension RealTimeGame: GKLocalPlayerListener { /// Handles when the local player sends requests to start a match with other players. func player(_ player: GKPlayer, didRequestMatchWithRecipients recipientPlayers: [GKPlayer]) { print("\n\nSending invites to other players.") } /// Presents the matchmaker interface when the local player accepts an invitation from another player. func player(_ player: GKPlayer, didAccept invite: GKInvite) { // Present the matchmaker view controller in the invitation state. if let viewController = GKMatchmakerViewController(invite: invite) { viewController.matchmakerDelegate = self rootViewController?.present(viewController, animated: true) { } } } } also I don't have "<key>CFBundleURLTypes</key>" in my info.plist, I don't know I need that or not...

Why is the GameController framework loaded I am checking the launch time of our app, using Instruments->App launch I was confused to find the GameConroller framework loaded I check the project, in the plist file, no configuration GCSupportedGameControllers, GCSupportsControllerUserInteraction related key. What else causes the GameController framework to load?

I have an AR game using ARKit with SceneKit that works just fine in iOS 17. In the iOS 18 betas, the AR background image shows black instead of showing the real world. As a result there's no tracking and obviously the whole game is useless. I narrowed down the issue to showing the Game Center Access Point. My app has ViewController 1 (VC1) showing the main menu and that's where I want to show the GC Access Point. From there you open VC2 which shows a list of levels. Selecting any level will open VC3 which has the ARScene. Following is the code I use to start Game Center in VC1: GKLocalPlayer.local.authenticateHandler = { gcAuthVC, error in let isGameCenterReady = (gcAuthVC == nil) && (error == nil) if let viewController = gcAuthVC { self.present (viewController, animated: true, completion: nil) } if error != nil { print(error?.localizedDescription ?? "") } if isGameCenterReady { GKAccessPoint.shared.location = .topLeading GKAccessPoint.shared.showHighlights = true GKAccessPoint.shared.isActive = true } } When switching to VC2 I run GKAccessPoint.shared.isActive = false so that the Access Point will no longer show in any of the following VCs. I tried running it in VC1, VC2, and again in VC3 - it doesn't change anything. Once I reach VC3, the background is black. If in VC1 I don't run GKAccessPoint.shared.isActive = true, so I don't activate the access point, the behavior is as follows: If I wait until after the Game Center login animation completes and closes on its own and then I proceed to VC2 and VC3, the camera image will show correctly If I quickly move to VC2 before the Game Center login animation has completed, so my code will close it by setting active = false, and then I continue to VC3, I will see the black background problem. So it does look like activating the access point and then de-activating it causes the issue. BTW, if I activate the access point and leave it on in all VCs, the same black background issue persists. Other than that, when I'm in VC3 with the black background and I switch to another app (so my game moves to the background), when it returns to the foreground, the camera suddenly shows the real world correctly! I tried to manually reset the AR session by pausing and restarting it, but that didn't change anything. Also, when I check with the debugger, it looks like when the app comes back to the foreground it also doesn't run the session start code. But something does seem to reset itself so I wonder what that is. Maybe I could trigger the same manually in my cdoe??? I repeat that everything works just fine in iOS 17 and below. This problem only started with the iOS 18 beta (currently on beta 5, but it started in some of the previous betas as well). So could this be a bug in iOS 18? As a workaround I could check the iOS version and if it's iOS18 not activate the access point, hoping that the user will not jump to VC2 too quickly, and show my own button which will open Game Center. But I'd rather give the users the full experience with their own avatar and the highlights showing up. Plus, certainly some users will move quickly to VC2 and that will be an awful experience. Any help would be greatly appreciated. Thanks!

Hello, has anyone been able to implement in their game a way to display the number of players currently online in their game?. I thought up of this feature and thought it will be useful for players to find out if there is anyone currently online so that they don't waste their time trying to find a random online match. Any help will be greatly appreciated. Kind regards, Jabir Abdi

This may be a bit dumb but I've really been having trouble with understanding the documentation for Apple's Unity Plugins. I wanted to implement Game Center functionality on my game. So far the only line of code I've managed to get working is the authentication, in which I did async void Start() { await Login(); } public async Task Login() { if (!GKLocalPlayer.Local.IsAuthenticated) { var player = await GKLocalPlayer.Authenticate(); var localPlayer = GKLocalPlayer.Local; ] } However, I'm at a complete loss as to how to open leaderboards. I followed the documentation given: void OpenLeaderboard() { var allLeaderboards = await GKLeaderboard.LoadLeaderboards(); var filteredLeaderboards = await GKLeaderboard.LoadLeaderboards("leaderboardIwant1"); } But it did not work. What did I do wrong? Am I missing a function to get it to work? Why can't Apple write proper documentation to properly implement this in a simple way? My apologies for my frustration. Up until now I've used another plugin from the Unity Asset Store which is shockingly easy to use, but I decided to attempt to use Apple's system because the plugin I had used deprecated functions and I was afraid the App Store would not approve it. But Apple's own plugins are stunningly opaque and hard to test. As additional questions (but not the main ones), I'm also completely at a loss how to submit scores or load specific leaderboards and Apple's documentation does nothing to help there either. Any help or thoughts are appreciated. Thanks.