Posts under App & System Services topic

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Getting VoIP notifications to work and use iOS call UI when phone is locked/app is in background/Not running
Hey there my application allows users to have video calls with each other using Agora. I have successfully set up incoming call functionality on Android but on iOS I am struggling to get the call ui to appear when the app is not running/in background/locked. To my knowledge this is because there is much stricter security on iOS which is limiting me from calling this. When i initially set it up it worked at first when the app was in the background but I think I was failing to report the call to call kit in time and now it's not working. I'm not sure if I need access to this entitlement: com.apple.developer.pushkit.unrestricted-voip Which i believe is only for the big boys or if I make sure I'm reporting the call to call kit fast enough that I won't encounter this issue and it will consistently work in the background.
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235
Mar ’25
HealthKit: Real-Time Sleep Tracking with Heart Rate Data
I am trying to track a user's real-time sleep state using heart rate data, but I have encountered several issues: When using HKSampleQuery on the phone to fetch heart rate data, I can only retrieve data recorded before the app comes to the foreground or before it is terminated and restarted (see related issue: https://developer.apple.com/forums/thread/774953). I attempted to get data on the Apple Watch and send updates to the phone via Watch Connectivity. However, if I use WKExtendedRuntimeSession, although I can obtain data on the watch, once the watch screen goes off, it can no longer transmit data via Watch Connectivity to the phone (since I cannot guarantee the app will remain in the foreground when lying in bed). On the other hand, using HKWorkoutSession results in interference with the activity rings and causes the heart rate sensor to run too frequently, which I worry may affect the battery life of the watch. Is there an elegant solution for tracking a user's heart rate data for sleep monitoring?
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123
Apr ’25
Detecting Sleep End Events and Sleep Data Sync Timing from Apple Watch to HealthKit on iPhone
Hello, I’m developing an iOS app that works with sleep data from Apple Watch via HealthKit. I would like to clarify the following: How can an iPhone app detect when a sleep session ends on the Apple Watch? When is sleep data typically written to the HealthKit store on iPhone after sleep ends? Is it immediately after wake-up, or does it depend on certain conditions (e.g., watch charging, connectivity)? Understanding the timing and mechanism of sleep data synchronization is crucial for our app to process accurate and timely health information. Thank you for your assistance.
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92
Apr ’25
WidgetKit And Picture rotation
I'm developing a widget with WidgetKit, and I'm having a problem: I need to click on an image, and when I click it triggers a network request, the image automatically rotates clockwise, and when the network ends, the image automatically stops rotating. How to do that? My current idea is to click on the image and await the call to the network request. Should Toggle be used for the control corresponding to the picture? Because Toggle has two states. Then there is how to do image rotation, did not find support API.
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117
Apr ’25
Push payload is not present on notification tap
I am checking if the user taps on the firebase push notification and get the payload. override func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) { let userInfo = response.notification.request.content.userInfo os_log("notification tapped %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String: AnyObject]) setFlutterLinkClickedVariable() } My use case is in app terminated state when push notification is tapped, get the link from payload and navigate to corresponding screen based on the link. This is working when there is only one push notification. When there are multiple push notifications with different links in the payload, only the first notification I tap works. Rest of the notifications just launches the app and does not navigate because the link is not set. I am getting the link from the payload and invoking flutter code which sets the link in the user defaults (shared preferences) and when the app launches in the home screen it checks for this variable and navigates accordingly. func handleNotificationPayload(_ payload: [String: AnyObject]) { if let link = payload["link"] as? String { setFlutterLinkVariable(link) } } override func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { os_log("app did receive remote notification %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String : AnyObject]) completionHandler(.newData) } Currently when there is only one push notification it works because the link is set from the above method. The click delegate is not calling. I did set the delegate in application(:didFinishLaunchingWithOptions). UNUserNotificationCenter.current().delegate = self application.registerForRemoteNotifications() How to solve this issue? Thanks.
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786
Apr ’25
Write access with URL.startAccessingSecurityScopedResource
In my App I want to create a new directory structure in a user selected base directory. In the entitlements com.apple.security.files.user-selected.read-write = true is defined. I call URL.startAccessingSecurityScopedResource( ) and get a true value back. When calling FileManager.createDirectory( at: directoryURL, withIntermediateDirectories: true, attributes: nil ) an error is thrown that write access is missing. User has write permissions in that directory. When the user selects a directory I store a bookmark via an @AppStorage variable. After write attempt URL.stopAccessingSecurityScopedResource() is called. I have also implemented a SharedExtension (especially for the Photo app). When user calls the SharedExtension of my app and the app just uses the bookmark stored with @AppStorage and follows the same process as described above no difficulties appear and directories are created as expected. Changing back to the main app, using again the untouched bookmark and execute the exactly same code as in the first attempt everything works fine and as expected. The phenomenon appears on real devices but not on simulator. Any ideas how to solve the issue of having no write access in first attempt?
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380
Mar ’25
SwiftData Many-To-Many Relationship: Failed to fulfill link PendingRelationshipLink
Hi there, I got two models here: Two Models, with Many-To-Many Relationship @Model final class PresetParams: Identifiable { @Attribute(.unique) var id: UUID = UUID() var positionX: Float = 0.0 var positionY: Float = 0.0 var positionZ: Float = 0.0 var volume: Float = 1.0 @Relationship(deleteRule: .nullify, inverse: \Preset.presetAudioParams) var preset = [Preset]() init(position: SIMD3<Float>, volume: Float) { self.positionX = position.x self.positionY = position.y self.positionZ = position.z self.volume = volume self.preset = [] } var position: SIMD3<Float> { get { return SIMD3<Float>(x: positionX, y: positionY, z: positionZ) } set { positionX = newValue.x positionY = newValue.y positionZ = newValue.z } } } @Model final class Preset: Identifiable { @Attribute(.unique) var id: UUID = UUID() var presetName: String var presetDesc: String? var presetAudioParams = [PresetParams]() // Many-To-Many Relationship. init(presetName: String, presetDesc: String? = nil) { self.presetName = presetName self.presetDesc = presetDesc self.presetAudioParams = [] } } To be honest, I don't fully understand how the @Relationship thing works properly in a Many-To-Many relationship situation. Some tutorials suggest that it's required on the "One" side of an One-To-Many Relationship, while the "Many" side doesn't need it. And then there is an ObservableObject called "ModelActors" to manage all ModelActors, ModelContainer, etc. ModelActors, ModelContainer... class ModelActors: ObservableObject { static let shared: ModelActors = ModelActors() let sharedModelContainer: ModelContainer private init() { var schema = Schema([ // ... Preset.self, PresetParams.self, // ... ]) do { sharedModelContainer = try ModelContainer(for: schema, migrationPlan: MigrationPlan.self) } catch { fatalError("Could not create ModelContainer: \(error.localizedDescription)") } } } And there is a migrationPlan: MigrationPlan // MARK: V102 // typealias ... // MARK: V101 typealias Preset = AppSchemaV101.Preset typealias PresetParams = AppSchemaV101.PresetParams // MARK: V100 // typealias ... enum MigrationPlan: SchemaMigrationPlan { static var schemas: [VersionedSchema.Type] { [ AppSchemaV100.self, AppSchemaV101.self, AppSchemaV102.self, ] } static var stages: [MigrationStage] { [AppMigrateV100toV101, AppMigrateV101toV102] } static let AppMigrateV100toV101 = MigrationStage.lightweight(fromVersion: AppSchemaV100.self, toVersion: AppSchemaV101.self) static let AppMigrateV101toV102 = MigrationStage.lightweight(fromVersion: AppSchemaV101.self, toVersion: AppSchemaV102.self) } // MARK: Here is the AppSchemaV101 enum AppSchemaV101: VersionedSchema { static var versionIdentifier: Schema.Version = Schema.Version(1, 0, 1) static var models: [any PersistentModel.Type] { return [ // ... Preset.self, PresetParams.self ] } } Fails on iOS 18.3.x: "Failed to fulfill link PendingRelationshipLink" So I expected the SwiftData subsystem to work correctly with version control. A good news is that on iOS 18.1 it does work. But it fails on iOS 18.3.x with a fatal Error: "SwiftData/SchemaCoreData.swift:581: Fatal error: Failed to fulfill link PendingRelationshipLink(relationshipDescription: (<NSRelationshipDescription: 0x30377fe80>), name preset, isOptional 0, isTransient 0, entity PresetParams, renamingIdentifier preset, validation predicates (), warnings (), versionHashModifier (null)userInfo {}, destination entity Preset, inverseRelationship (null), minCount 0, maxCount 0, isOrdered 0, deleteRule 1, destinationEntityName: "Preset", inverseRelationshipName: Optional("presetAudioParams")), couldn't find inverse relationship 'Preset.presetAudioParams' in model" Fails on iOS 17.5: Another Error I tested it on iOS 17.5 and found another issue: Accessing or mutating the "PresetAudioParams" property causes the SwiftData Macro Codes to crash, affecting both Getter and Setter. It fails with an error: "EXC_BREAKPOINT (code=1, subcode=0x1cc1698ec)" Tweaking the @Relationship marker and ModelContainer settings didn't fix the problem.
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149
Apr ’25
CloudKit Sharing Issue: "Unknown client: ChoreOrganizer"
I'm experiencing a persistent issue with CloudKit sharing in my iOS application. When attempting to present a UICloudSharingController, I receive the error message "Unknown client: ChoreOrganizer" in the console. App Configuration Details: App Name: ChoreOrganizer Bundle ID: com.ProgressByBits.ChoreOrganizer CloudKit Container ID: iCloud.com.ProgressByBits.ChoreOrganizer Core Data Model Name: ChoreOrganizer.xcdatamodeld Core Data Entity: Chore Error Details: The error "Unknown client: ChoreOrganizer" occurs when I present the UICloudSharingController This happens only on the first attempt to share; subsequent attempts during the same app session don't show the error but sharing still doesn't work All my code executes successfully without errors until UICloudSharingController is presented Implementation Details: I'm using NSPersistentCloudKitContainer for Core Data synchronization and UICloudSharingController for sharing. My implementation creates a custom CloudKit zone, saves both a record and a CKShare in that zone, and then presents the sharing controller. Here's the relevant code: @MainActor func presentSharing(from viewController: UIViewController) async throws { // Create CloudKit container let container = CKContainer(identifier: containerIdentifier) let database = container.privateCloudDatabase // Define custom zone ID let zoneID = CKRecordZone.ID(zoneName: "SharedChores", ownerName: CKCurrentUserDefaultName) do { // Check if zone exists, create if necessary do { _ = try await database.recordZone(for: zoneID) } catch { let newZone = CKRecordZone(zoneID: zoneID) _ = try await database.save(newZone) } // Create record in custom zone let recordID = CKRecord.ID(recordName: "SharedChoresRoot", zoneID: zoneID) let rootRecord = CKRecord(recordType: "ChoreRoot", recordID: recordID) rootRecord["name"] = "Shared Chores Root" as CKRecordValue // Create share let share = CKShare(rootRecord: rootRecord) share[CKShare.SystemFieldKey.title] = "Shared Tasks" as CKRecordValue // Save both record and share in same operation let recordsToSave: [CKRecord] = [rootRecord, share] _ = try await database.modifyRecords(saving: recordsToSave, deleting: []) // Present sharing controller let sharingController = UICloudSharingController(share: share, container: container) sharingController.delegate = shareDelegate // Configure popover if let popover = sharingController.popoverPresentationController { popover.sourceView = viewController.view popover.sourceRect = CGRect( x: viewController.view.bounds.midX, y: viewController.view.bounds.midY, width: 1, height: 1 ) popover.permittedArrowDirections = [] } viewController.present(sharingController, animated: true) } catch { throw error } } Steps I've already tried: Verified correct bundle ID and container ID match in all places (code, entitlements file, Developer Portal) Added NSUbiquitousContainers configuration to Info.plist Ensured proper entitlements in the app Created and configured proper provisioning profiles Tried both default zone and custom zone for sharing Various ways of saving the record and share (separate operations, same operation) Cleaned build folder, deleted derived data, reinstalled the app Tried on both simulator and physical device Confirmed CloudKit container exists in CloudKit Dashboard with correct schema Verified iCloud is properly signed in on test devices Console Output: 1. Starting sharing process 2. Created CKContainer with ID: iCloud.com.ProgressByBits.ChoreOrganizer 3. Using zone: SharedChores 4. Checking if zone exists 5. Zone exists 7. Created record with ID: <CKRecordID: 0x3033ebd80; recordName=SharedChoresRoot, zoneID=SharedChores:__defaultOwner__> 8. Created share with ID: <CKRecordID: 0x3033ea920; recordName=Share-C4701F43-7591-4436-BBF4-6FA8AF3DF532, zoneID=SharedChores:__defaultOwner__> 9. About to save record and share 10. Records saved successfully 11. Creating UICloudSharingController 12. About to present UICloudSharingController 13. UICloudSharingController presented Unknown client: ChoreOrganizer Additional Information: When accessing the CloudKit Dashboard, I can see that data is being properly synced to the cloud, indicating that the basic CloudKit integration is working. The issue appears to be specific to the sharing functionality. I would greatly appreciate any insights or solutions to resolve this persistent "Unknown client" error. Thank you for your assistance.
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724
Mar ’25
macOS + ARM + USB/C to get VCP code from external monitor via IOAVServiceReadI2C
Good morning, I'm encountering reliability issues with DDC/CI communication when using USB-C connection. Initially using ddc-hi (which uses this package), I ran into several issues that I've partially resolved but still need help addressing. Environment OS: macOS Display Connection: USB-C for _ in 1 ... (numOfRetryAttemps ?? 4) + 1 { for _ in 1 ... max((numOfWriteCycles ?? 2) + 0, 1) { usleep(writeSleepTime ?? 10000) success = IOAVServiceWriteI2C(service, UInt32(ARM64_DDC_7BIT_ADDRESS), UInt32(dataAddress), &packet, UInt32(packet.count)) == 0 } if !reply.isEmpty { usleep(readSleepTime ?? 50000) if IOAVServiceReadI2C(service, UInt32(ARM64_DDC_7BIT_ADDRESS), 0, &reply, UInt32(reply.count)) == 0 { success = self.checksum(chk: 0x50, data: &reply, start: 0, end: reply.count - 2) == reply[reply.count - 1] } } if success { return success } usleep(retrySleepTime ?? 20000) } The result from IOAVServiceReadI2C is not reliable in some cases. Do we have any other API to get VCP code from monitor like Intel version done. The previous APIs weren’t working anymore on the M1 GPU, the IOFramebuffer was now an IOMobileFramebuffer and the IOI2C* functions weren’t doing anything.
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341
Mar ’25
Guidance on Continuous Location & Direction Updates to watchOS App Without Screen Dimming
Dear Apple Developer Support, I am reaching out for guidance on implementing continuous directional and location updates in a watchOS app designed as part of a mapping/navigation solution. Current Scenario: We send continuous location and direction updates from our iOS app to the watchOS companion app. When viewing directions on the Apple Watch, the screen dims after a short period, and the live data stops updating consistently, even though the user is actively looking at the screen. This negatively impacts the usability of real-time navigation on watchOS. Our Objective: Prevent screen dimming (or extend screen-on time) while the user is viewing navigation directions. Ensure reliable, continuous data updates on the watch screen during active navigation sessions. Request: We would appreciate your guidance on: The recommended method to keep the watchOS screen active while displaying real-time navigation data. Proper use of APIs such as WKExtendedRuntimeSession, WorkoutSession, or any other mechanism suitable for this use case. Any best practices or App Store review considerations for apps that require extended screen time and continuous updates. How such use cases were traditionally handled on watchOS and what has or hasn’t worked. We want to ensure we're implementing this in a battery-efficient, user-respectful, and Apple-compliant manner. Thank you for your assistance and guidance.
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91
Apr ’25
Issue with UWB ranging on DWM3001CDK using NINearbyAccessoryConfiguration in Background mode
Hi, I’m trying to perform UWB ranging between an iPhone and a Qorvo DWM3001CDK accessory using Apple NI’s NINearbyAccessoryConfiguration class. I’ve followed the steps described in the official Apple documentation (https://developer.apple.com/documentation/nearbyinteraction/ninearbyaccessoryconfiguration), specifically for enabling background mode using the init(accessoryData:bluetoothPeerIdentifier:) initializer. The configuration is successfully created, and background mode is enabled. However, when the iPhone starts the session, I doesn’t receive any ranging data from the DWM3001CDK, and the session ends with a timeout. Interestingly, if I use the init(data:) initializer, I can successfully receive ranging data, but this only works in foreground mode, which doesn’t meet my requirements. Steps I’ve followed: Used Core Bluetooth to discover and pair the accessory. Retrieved the configuration data from the accessory according to the third-party UWB device specifications. Initialized the configuration using NINearbyAccessoryConfiguration(accessoryData:bluetoothPeerIdentifier:) for background mode. Started the session with NISession.run(configuration). Waited for updates in the delegate method session(_:didUpdate:). Specific questions: Are there additional requirements for using init(accessoryData:bluetoothPeerIdentifier:) to enable background UWB ranging with the DWM3001CDK? Is there a known difference in how init(data:) and init(accessoryData:bluetoothPeerIdentifier:) handle the ranging process? Any advice or insights would be greatly appreciated. Thanks in advance!
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456
Mar ’25
Apple Pay - PKAddPaymentPassViewController doesn't show correct list of devices
Hi, We are trying to make the PKAddPaymentPassViewController to show the correct list of devices to where the pass can be added. We have analysed the documentation and we are using the PrimaryAccountIdentifier field which is the field that supposedly controls this behavior but the list of devices presented in the view controller always include one iPhone and one Apple Watch, regardless of where the card has been already added. We are initializing the PKAddPaymentPassRequestConfiguration object with: PKEncryptionScheme PrimaryAccountIdentifier CardholderName PrimaryAccountSuffix LocalizedDescription PaymentNetwork PrimaryAccountIdentifier CardholderName PrimaryAccountSuffix LocalizedDescription We have also verified the configuration in our payment pass processor and everything should be ok. We would like to have some help on achieving the desired flow for Apple Pay, which is to present the PKAddPaymentPassViewController with the correct list of available devices and not the full list. Thank you.
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570
Apr ’25
Unable to Write to App Group Shared Container on Device
Hi everyone, I'm facing an issue where I cannot write a file to a shared App Group container in my tvOS app when running on a real device. My code works perfectly on the simulator, but fails on a physical device with a permissions error. I’ve set up an App Group with a custom identifier (e.g., group.<my.identifier>), and it’s correctly configured in the Capabilities section of Xcode for both my main app and widget targets. Here’s the code I’m using to save a test file: func saveTestFile() { guard let groupURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.<my.identifier>") else { print("Couldn't access the Group URL.") return } let containerURL = groupURL.appendingPathComponent("Library", isDirectory: true) if FileManager.default.isWritableFile(atPath: containerURL.path) { print("Directory IS writable") } else { print("Directory IS NOT writable") } let fileURL = containerURL.appendingPathComponent("test.txt") let content = "Hello App Group!" do { try content.write(to: fileURL, atomically: true, encoding: .utf8) print("File test.txt is saved at: \(fileURL.path)") } catch { print("Error while saving the file: \(error)") } } Console: Directory IS NOT writable Error while saving the file: Error Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “test.txt” in the folder “”." UserInfo={NSFilePath=/private/var/mobile/Containers/Shared/AppGroup//Library/test.txt, NSURL=file:///private/var/mobile/Containers/Shared/AppGroup//Library/test.txt, NSUnderlyingError=0x14387fbe0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}} I’ve tried saving the file in different subdirectories within the App Group container: Directly in groupURL (root of the container). In groupURL.appendingPathComponent("Library"). In groupURL.appendingPathComponent("Caches"). Do you have any ideas what is the problem? Thanks in advance for any help!
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156
Apr ’25
iOS did not update all widgets of an app when the user press a button on a widget
Hello, I have an app in AppStore "Counter Widget". https://apps.apple.com/app/id1522170621 It allows you to add a widget to your homescreen/lockscreen to count anything. Everything works fine except for one scenario. iOS 18+ I create 2 or more widgets for one counter. For example, medium and small widgets. I click on the widget button to increase or decrease the value. The button in the widget uses Button(intent: AppIntent) to update the value and calls WidgetCenter.shared.reloadAllTimelines() to update the second widget for the same counter. For iOS 18 in this particular scenario, you don't even have to call the WidgetCenter.shared.reloadAllTimelines(). iOS already knows that there is a widget with the same INIntent settings and will update it itself. Both widgets are updated and show the new value. Everything is correct. Now on the homescreen I open the widget configuration for one of the widgets to change the INIntent for the widget. For example, i change the background to wallpaper. This is just a skin for the widget, and the widget is associated with the same counter value as before. As in (2), I click the widget button to increase or decrease the value. But now only one widget is updated. iOS ignores my call to WidgetCenter.shared.reloadAllTimelines() and does not update the second widget connected to the same counter. As I found, iOS, when I call WidgetCenter.shared.reloadAllTimelines() from the widget itself, updates other widgets only if INIntent is absolutely equal for them. Overriding isEqual for them did not help. That is, I cannot specify which fields from my INIntent can be ignored during such an update and consider that widgets are equal and need to be updated. Obviously iOS make this compare outside my code. The main problem is that when the user adds a widget to the lock screen and increases and decreases the value there. After that, he opens the home screen and the widget there is not synchronized with the value from the widget on the lock screen. How to solve this problem?
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884
Apr ’25
The operation could not be completed. (Error 2 in SKErrorDomain.) during subscription upgrade
I have a renewing monthly subscription in my app and recently added upgrade possibilities to yearly and 6 month subscriptions. Those new subscriptions were reviewed, approved and published to App Store. I'm showing a modal for users in the app from where they can upgrade their subscription. Upgrading was tested with real devices on Sandbox and TestFlight. There has been successful purchases through the in app modal in production app, and directly upgrading from App Store. However, for some users there seems to happen a failed transaction with paymentCancelled error code during the upgrade. The IAP is still successful, their subscription is upgraded and they haven't voluntarily canceled the IAP. The localized description of the error is "Toimintoa ei voitu suorittaa. (Virhe 2 kohteessa SKErrorDomain.)" which translates to "The operation could not be completed. (Error 2 in SKErrorDomain.)" These users have various iPhones (iPhone 12 Pro, iPhone 14 Pro, iPhone 15 Pro, iPhone 16 Pro) with up to date iOS versions (>= 18.3.1). I'm receiving DID_CHANGE_RENEWAL_PREF (UPGRADE) server notification of these purchases on my server. I haven't been able to reproduce this error myself. Any ideas why StoreKit might fail the transaction with paymentCancelled error but still successfully upgrade the subscription?
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215
Mar ’25
iOS Team Provisioning Profile oesn't include the com.apple.developer.activitykit entitlement.
I would like to add a Live Activity to my app, but unfortunately I always get an error message. When I go into the Identifiers via the Developer Portal and look at my app, there is no Activity Kit or Live Activity in the Capabilites that I could activate. In XCode I don't see the option for Signing & Capabilities either... Can anyone help me how to add this correctly? Thanks in advance!
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192
Apr ’25