Create apps that allow players to interact with each other using GameKit.

GameKit Documentation

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Test Game Center integration for new game
Hi! I have a new game and I have setup the leaderboards and achievements in App Store Connect but all of them are "not live" and in console I see this warning: "No AchievementDescription could be found for Achievement with ID: {my_ID}" I did not do a fresh Game Center setup for a long time, but is there any way to test if achievements and leaderboards are working for nonreleased game? Thank you!
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1.1k
Apr ’24
New Game Center Sign In Screen: How to know when it is presented, covering my app?
Recently (I'm not sure exactly when), the "Sign in to Game Center" banner started appearing at the top of my app when the app sets the GC authentication handler and there is no Game Center player currently signed in on the device: So far so good. But if the banner is tapped, a full "Sign In to Game Center" modal view automatically appears and covers the app without notification: This is not the sign-in view controller that the GC authentication handler normally passes when a player is not signed in, which previously gave my app control over when to present it. My app is unaware that it is covered by this new sign-in screen. Is there any way for my app to know when the user taps the "Sign In" banner and causes this new automatic sign-in screen to appear? I need to pause my game while it is covered up. In general, is there a way for my view controller to be notified when it has been covered by a modal view controller that's outside my app's control?
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581
Mar ’24
Compatibility Inquiry: 8BitDo Ultimate 2.4G Wireless Controller on macOS
Hi there, I'm reaching out to inquire about compatibility restrictions regarding the 8BitDo Ultimate 2.4G Wireless Controller on macOS systems, particularly its functionality with third-party applications such as Construct 3, a browser-based game development software. As an indie game developer, I recently acquired the 8BitDo Ultimate controller for its touted compatibility and functionality. While I've primarily used it in Bluetooth mode on my Mac without encountering any significant issues, I've stumbled upon a peculiar problem when using the controller while developing projects in Construct 3, specifically within the preview mode of the game engine. In attempting to test my projects using Construct 3's preview feature, the controller fails to detect any of my inputs. This is particularly confounding as the controller operates flawlessly when I export a proper macOS build of the game from the engine and play it externally. To further investigate, I experimented with Nintendo Switch Joy-Cons, which surprisingly worked seamlessly without encountering any issues during testing within Construct 3's preview mode. Upon reaching out to both Construct 3 and 8BitDo customer support, I was informed that the compatibility restriction with third-party controllers on macOS is due to limitations imposed by Apple, which are beyond their control. Consequently, I sought assistance from Apple Developer Program Support, who directed me to contact the Code-level Technical Support team or inquire on the developer forum. The lack of compatibility with crucial development tools like Construct 3 significantly hampers my workflow as an indie developer, and I'm eager to find a resolution to this issue. Thank you for your time, and I'm hopeful that someone within the community might be able to provide guidance on this matter.
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1.5k
Mar ’24
I delete Gaming Port Kit and want to redownload it again, than it happened.
I've installed the GPTK before, but it pops up with some problems so I want to reinstall it again. So I deleted home brew and redownload all the materials I needed. But when it comes to install the game-porting-toolkit formula, I can't download it, did anyone have the same problem with me? jimmy@Jimmymbp14 ~ % brew -v install apple/apple/game-porting-toolkit Error: Formulae found in multiple taps: * apple/apple/game-porting-toolkit-compiler * gcenx/apple/game-porting-toolkit-compiler Please use the fully-qualified name (e.g. apple/apple/game-porting-toolkit-compiler) to refer to a specific formula. jimmy@Jimmymbp14 ~ %
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809
Mar ’24
USB HID Specifics for Mac OS?
I am currently developing an USB HID Device, specifically a type of Joystick. However it seems that any attempt of getting a joystick to work on Mac do not work. My prototype works perfectly on Windows, being recognised as such and receiving all data. On MacOS, the Joystick is not recognised as a Joystick though, and the OS does not seem to receiver any Input from it whatsoever. I have translated my code to use both Mouse and Keyboard, both work perfectly. I have also tried to have the Joystick identify as a Gamepad, but again, it works on Windows and is not recognised on Mac (is not recognised as a Gamepad). Are there any specific restrictions to HID devices on MacOS? Apple developer only seems to describe specifics from a software standpoint, not from the standpoint of someone developing hardware. And even then it only seems to describe very specific HID devices, such as mouse, keyboard or a stylus. Please also keep in mind that I don't have much experience developing MacOS applications.
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1.3k
Mar ’24
Issues using xbox 360 controller on Macbook Air
Hi all, I have a macbook air 2022 with the M2 chip inside. I am trying to use a wired xbox 360 controller to play games on steam. However, whenever I try to plug it it, the light shines green for a little bit and then turns off. I checked in my usb device tree through the system report and it says that there is a controller plugged in. The controller doesn't work in the game either, are there any fixes? I am also on macOS Monterey version 12.4
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792
Mar ’24
GKLocalPlayer.local.isMultiplayerGamingRestricted not representing all relevant scenarios?
I need clarification on the GKLocalPlayer.local.isMultiplayerGamingRestricted behavior which check's user's device capability (whether it is set up to allow or disallow multiplayer) I am referring to this from Apple documentation at : https://developer.apple.com/documentation/gamekit/authenticating_a_player if GKLocalPlayer.local.isMultiplayerGamingRestricted { // Disable multiplayer game features. } The issue is that this is a boolean (true/false value ) However I have noticed that iOS ( latest version and preceding versions) allow people to have the following options: ( you can set these under screen time -> content restrictions -> Multiplayer games ) Disallow all multiplayer games - presumably your API returns a false for this. Allow multiplayer with friends only -???? what does GKLocalPlayer.local.isMultiplayerGamingRestricted return here?? if True, how is the Friends only restriction handled? Are we supposed to do something to force it? Note: So far I am relying on Apple's Game Center native experience and have not added wrappers to do additional filtering etc. I hope that I shall be able to keep doing so. Allow all multiplayer games - presumably your API returns a false for this. You can see how there are three choices but this is modeled as a boolean. Choice number 2. is not addressed. Has anyone come across this? Note: This is very different from checking for underage users. No matter what I do, in my post above, it won't set the correct numbers for numbered bullet -points. I call them 1, 2, 3 it posts 1,1,2 or 1.,2,1 etc. ( side nit ) Apologies if this isn't as readable as it should be.
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1.4k
Mar ’24
[iOS 17] GKAppLevelSignInVisibility fetchAppLevelVisibilityConstraintsWithHandler crash
We noticing below crash mainly happening in iOS 17. Can someone check and confirm what is the root cause for this and how to fix the crash. GKAppLevelSignInVisibility fetchAppLevelVisibilityConstraintsWithHandler Thread 36 Crashed: 0 CoreFoundation 0x00000001904a9d6c -[__NSDictionaryM setObject:forKeyedSubscript:] + 452 (NSDictionaryM.m:202) 1 GameCenterUICore 0x000000020fe6d508 __76+[GKAppLevelSignInVisibility fetchAppLevelVisibilityConstraintsWithHandler:]_block_invoke_3 + 84 (GKAppLevelSignInVisibility.m:82) 2 GameCenterFoundation 0x00000001c8b8971c @objc closure #1 in LimitedPresentationManager.presentationDisabled(config:context:) + 268 3 GameCenterFoundation 0x00000001c8b8b111 partial apply for @objc closure #1 in LimitedPresentationManager.presentationDisabled(config:context:) + 1 4 GameCenterFoundation 0x00000001c8b8b101 thunk for @escaping @callee_guaranteed @Sendable @async () -> () + 1 5 GameCenterFoundation 0x00000001c8b8b105 partial apply for thunk for @escaping @callee_guaranteed @Sendable @async () -> () + 1 6 GameCenterFoundation 0x00000001c8b8aa0d specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 (:0) 7 GameCenterFoundation 0x00000001c8b8ab6d partial apply for specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 (:0) 8 libswift_Concurrency.dylib 0x000000019b78da41 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:463) Full iOS crash log
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911
Feb ’24
Using video chat instead of voice chat on online game ?
Hello, I am building an app that requires players joined to an online game session and to have a video chat with both of their front cameras turned on. I currently know that GameKit supports the voice chat option but could not find any source for video chat. Is it possible set up a video chat on an online game session?. What libraries can I use that have support in implementing the video chat (AVFoundation) ? Your assistance is greatly appreciated.
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898
Feb ’24
Game Center authenticateHandler on visionOS
GKLocalPlayer.local.authenticateHandler = {viewController, error in When authenticating a player using authenticateHandler, the completion handler is only called if the player is already logged in. If the player is not logged in, the authentication window will appear but the completion handler is never called. If I have content in a volumetric window that obscures the login window (which appears at a slight Z increase from the parent window), what can I do? If the completion handler was being called then I could make adjustments to my view, but it never gets called if the user is not already logged in. https://developer.apple.com/documentation/gamekit/authenticating_a_player Thanks.
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563
Feb ’24
AGPT not working properly.
I am on a MacBook Pro 2023. 16inch, 16gb ram, 1tb drive. I am on the latest MacOs (Sonoma 14.3.1) and using the steps from the Apple Gaming Wiki to download the Game Porting Toolkit. I have met all the requirements. I tried using the automated installer, didn't work. I tried doing homebrew, and it worked all up until I got to the step where I had to run the command to download Apple tap: brew tap apple/apple http://github.com/apple/homebrew-apple I get this error: Logs: /Users/MYNAME/Library/Logs/Homebrew/game-porting-toolkit/00.options.out /Users/MYNAME/Library/Logs/Homebrew/game-porting-toolkit/01.configure /Users/MYNAME/Library/Logs/Homebrew/game-porting-toolkit/01.configure.cc /Users/MYNAME/Library/Logs/Homebrew/game-porting-toolkit/02.make /Users/MYNAME/Library/Logs/Homebrew/game-porting-toolkit/wine64-build If reporting this issue please do so to (not Homebrew/brew or Homebrew/homebrew-core): apple/apple
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726
Feb ’24
DS4macOS Compiled Things Partially and Run But it Has 30+ Yellow Warnings & Doesn't Show the Setting
Hi Apple and Swift friends. I'm not really a fluent Swift programmer (or any language) just knowledgable, I just a vague logic of what's going on. This is a gamepad controller remapper similar to DS4Windows on the PC and DSX on Steam gaming. On macOS Sonoma, it successfully compiled and connected the amazing Sony Playstation DualSense but because it has 33 yellow warning, the Setting doesn't show. It says something about outdated something and needs to be replaced by a newer framework.network. It also says it can't use self: It should look like these: What could be the syntax changes that won't produce the 30+ yellow warnings? The file can be had here: [https://github.com/marcowindt/ds4macos) God bless.
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837
Feb ’24
Game Porting Toolkit Error
I tried twice to install homebrew and I got a error message twice: Error: apple/apple/game-porting-toolkit 1.1 did not build Logs: /Users/omarzunun/Library/Logs/Homebrew/game-porting-toolkit/00.options.out /Users/omarzunun/Library/Logs/Homebrew/game-porting-toolkit/01.configure /Users/omarzunun/Library/Logs/Homebrew/game-porting-toolkit/01.configure.cc /Users/omarzunun/Library/Logs/Homebrew/game-porting-toolkit/02.make /Users/omarzunun/Library/Logs/Homebrew/game-porting-toolkit/wine64-build If reporting this issue please do so to (not Homebrew/brew or Homebrew/homebrew-core): apple/apple
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1
1.9k
Jan ’24
Matchmaker connecting issues on Mobile network
I'm trying to establish a connection between two devices using mobile network. The config in both devices are ok allowing use mobile data for the app. I'm able to connect and start the game with WIFI networ `// Initiate matchmaking - (void)initiateMatchmakingWithViewController:(UIViewController*)rustViewController { dispatch_async(dispatch_get_main_queue(), ^{ if (![GKLocalPlayer localPlayer].isAuthenticated) { NSLog(@"Player is not authenticated."); return; } NSLog(@"Preparing MatchMaker"); GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.minPlayers = 2; request.maxPlayers = 2; GKMatchmakerViewController *mmvc = [[GKMatchmakerViewController alloc] initWithMatchRequest:request]; mmvc.matchmakerDelegate = self; // Use the passed view controller to present the matchmaking UI [rustViewController presentViewController:mmvc animated:YES completion:nil]; NSLog(@"MatchMaker running...."); // Store the rustViewController for later, to revert back to it originalViewController = rustViewController; }); } // GKMatchmakerViewControllerDelegate methods - (void)matchmakerViewControllerWasCancelled:(GKMatchmakerViewController *)viewController { [originalViewController dismissViewControllerAnimated:YES completion:nil]; NSLog(@"Matchmaking was cancelled."); } - (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFailWithError:(NSError *)error { [originalViewController dismissViewControllerAnimated:YES completion:nil]; NSLog(@"Matchmaking failed with error: %@", error.localizedDescription); } - (void)matchmakerViewController:(GKMatchmakerViewController *)viewController didFindMatch:(GKMatch *)match { [originalViewController dismissViewControllerAnimated:YES completion:nil]; self.currentMatch = match; match.delegate = self; NSLog(@"Match found."); // Fetch details for each player in the match NSMutableArray<NSString *> *playerIDs = [NSMutableArray array]; for (GKPlayer *player in match.players) { [playerIDs addObject:player.playerID]; } [GKPlayer loadPlayersForIdentifiers:playerIDs withCompletionHandler:^(NSArray<GKPlayer *> *players, NSError *error) { if (error) { NSLog(@"Error retrieving player details: %@", error.localizedDescription); return; } for (GKPlayer *player in players) { if (![player.playerID isEqualToString:GKLocalPlayer.localPlayer.playerID]) { [self loadAndStoreAvatarForRemotePlayer:player]; } } }]; }` I can see how both clients are in state "connecting" but the log "Match found." it's never set. I also can see this log "[Match] syncPlayers failed to loadPlayersForLegacyIdentifiers"
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476
Jan ’24
Game Center MatchMaker only work on WIFI
I'm working in a game where I integrate matchmaker and it's working fine when I try with two devices under same wifi network, but in the moment I use 5g mobile network and I do the matchmaker, I can still see each other but the game did not start and I see error sending data to the remote player. The game is not yet published and I'm using TestFlight for the clients.
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599
Jan ’24