Hello, I have a SwiftUI application with a Core Data model. This model contains some entities, with properties. The canvas is working as expected, showing the preview. But whenever I add a new entity, event without any property, the canvas fail to show the preview (event a basic view with only a text view in it). The error message is the following: Cannot preview in this file - The operation couldn't be completed. Transaction failed. Process failed to launch. I tried to clean my cache, the derived data folder, reset the simulators, etc. When I click on Diagnostics, here is the message: Error Domain=FBProcessExit Code=4 "The process crashed." UserInfo={NSLocalizedFailureReason=The process crashed., BSErrorCodeDescription=crash, NSUnderlyingError=0x600002f29dd0 {Error Domain=signal Code=4 "SIGILL(4)" UserInfo={NSLocalizedFailureReason=SIGILL(4)}}} RemoteHumanReadableError: The operation couldn’t be completed. Transaction failed. Process failed to launch. (process launch failed) BSTransactionError (1): ==error-description: Process failed to launch. ==precipitating-error: Error Domain=FBProcessExit Code=4 "The process crashed." UserInfo={NSLocalizedFailureReason=The process crashed., BSErrorCodeDescription=crash, NSUnderlyingError=0x600002f29dd0 {Error Domain=signal Code=4 "SIGILL(4)" UserInfo={NSLocalizedFailureReason=SIGILL(4)}}} ==NSLocalizedFailureReason: Transaction failed. Process failed to launch. (process launch failed) ==transaction: <FBApplicationProcessLaunchTransaction: 0x60000186d960> ==error-reason: process launch failed Any idea why I have that? Thanks, Axel PS: I'm using Xcode 12 beta 6 (also tried on beta 5). I'm on macOS Big Sur (20A5364e).

Hello, I'm implementing Sign In With Apple in a SwiftUI application (iOS 14, SwiftUI 2). I'm importing the AuthenticationServices framework. The app build successfully, and can run on an iOS device or simulator. But I cannot preview the view in the Preview / Canvas (it would be easier to design the view). Cannot find 'SignInWithAppleButton' in scope Any idea why? Thanks Axel PS: Xcode 12 beta 6, macOS Big Sur beta 5

Hello, When a user cancels a subscription during a free trial, we should stop providing access to content. How can we know that? From the in app management in Xcode, when I cancel a subscription during free trial period (cancelling in the few seconds after the purchase), the currentEntitlements still provide the subscription. How to know when a user cancelled the subscription during free trial? Thanks

I'm not a member of any Family in iCloud. I want to understand what happens when a user is subscribed through Family Sharing but also how to use StoreKit when the user is subscribed twice: as an individual who purchased the product and as a member of a family when the purchase is shared with him. How can I test Family Sharing for an app offering a product with Family Sharing enabled? Is it possible to create a fake Family in App Store Connect and add testers to it?

Let's imagine an app with two plans, one for individual (level of service 2) and one for family (level of service 1). If a user is subscribed as an individual, but if someone in his family shares a family plan with him, will Transaction.currentEntitlements show both subscriptions? Or only the transaction where the user is the owner (in this case the individual subscription)?

When we request the current entitlements for a user using the Transaction.currentEntitlements static method, does StoreKit provide transactions for subscriptions with a Product.SubscriptionInfo.RenewalState set to .inGracePeriod or only .subscribed? I'm asking because as a developer we need to give access to content to a user if its subscription is in .inGracePeriod. So in my opinion, the user is still entitled to this subscription. I've not found any information in the documentation, WWDC videos or Apple sample codes. The documentation explains The latest transaction for each active auto-renewable subscription Is .inGracePeriod considered an active subscription?

When dealing with auto-renewable subscriptions, there are multiple ways to access the latest transaction. We can access it when a purchase is made, or we can request the latest transaction for a given productID at a later time. To do so, we can use Transaction.latest(for:), access the transaction history using Transaction.all, get the currentEntitlements, or use the array of Product.SubscriptionInfo.Statusthan contains the latest transaction for a subscription group. It's also necessary to listen to transactions when the app is running using the AsyncSequenceTransaction.updates`. In my app (and also in the SKDemo project from Apple), when I want to access the latest transaction as soon as the app is launched, it's missing the transactions that renewed or happened while the app was not running. I tried using the different methods mentioned above but they never give me the latest transaction, always the latest transaction while the app was running before I killed it. I have to wait for a new renewal event to receive the latest transaction in the Transaction.updates listener, which is not good. For example, when I set the Subscription Renewal Rate to Monthly Renewal Every 30 seconds, and I quit the app when the latest transactionId is 100, I wait for 5 minutes, I expect to see the transactionId 110 but I see 100. In the real life, it means that if the app is not running when a monthly or annual subscription renews, I have to wait weeks or months to receive the missing transaction. I thought that the Transaction.updates listener would be called at launch with all the transactions that occurred while the app was not running. Is that a bug in Xcode or have I misunderstood something? How can I access the real latest transaction that happened when the app was not running at launch? I need to access that to know what the user has access to. I think the transaction management panel from Xcode displays all the transactions, even the one when the app was not running. PS: I'm using Xcode 13.2.1 and iOS 15.0 (simulator). Transaction.updates is not working on iOS 15.2 (my device, or simulator) from what I've seen so far.

Xcode Version 13.3 beta 3 (13E5104i) or Version 13.2.1 (13C100) When I add a dictionary to the Info.plist file from the Info tab in the project (for example with the Privacy - Location Temporary Usage Description Dictionary key), Xcode immediately crashes with the following message, that seems to be related to the type of new item added. ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-20084/DVTFoundation/MacroExpansion/DVTMacroDefinitionTable.mm:1034 Details: value must be nil, string or array, but is { } Object: <DVTMacroDefinitionTable: 0x7fe3afb62ce0> Method: -_setLiteralValue:forMacroName:conditionSet:wantsCheckForDVTMacroExpansionConformance: Thread: <_NSMainThread: 0x7fe3c480ed70>{number = 1, name = main} Open FDs: 70/7168 Hints: Backtrace: 0 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit) 1 _DVTAssertionHandler (in DVTFoundation) 2 _DVTAssertionFailureHandler (in DVTFoundation) 3 -[DVTMacroDefinitionTable _setLiteralValue:forMacroName:conditionSet:wantsCheckForDVTMacroExpansionConformance:] (in DVTFoundation) 4 -[DVTMacroDefinitionTable setLiteralValue:forMacroName:conditionSet:] (in DVTFoundation) 5 -[DVTMacroDefinitionTable setObject:forKeyedSubscript:] (in DVTFoundation) 6 __52-[PBXTarget _adjustBuildSettingsForProductSettings:]_block_invoke (in DevToolsCore) 7 __NSDICTIONARY_IS_CALLING_OUT_TO_A_BLOCK__ (in CoreFoundation) 8 -[__NSDictionaryM enumerateKeysAndObjectsWithOptions:usingBlock:] (in CoreFoundation) 9 -[PBXTarget _adjustBuildSettingsForProductSettings:] (in DevToolsCore) 10 -[PBXTarget writeProductSettings:configuration:] (in DevToolsCore) 11 -[PBXTarget setProductSettings:configuration:] (in DevToolsCore) 12 -[PBXTarget setProductSettings:] (in DevToolsCore) 13 -[Xcode3ExtensionBasedInfoController setInfoDictionary:] (in Xcode3UI) 14 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] (in Foundation) 15 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] (in Foundation) 16 _NSSetObjectValueAndNotify (in Foundation) 17 __35-[Xcode3InfoEditor _createSubviews]_block_invoke (in Xcode3UI) 18 -[DVTObservingBlockToken observeValueForKeyPath:ofObject:change:context:] (in DVTFoundation) 19 NSKeyValueNotifyObserver (in Foundation) 20 NSKeyValueDidChange (in Foundation) 21 NSKeyValueDidChangeWithPerThreadPendingNotifications (in Foundation) 22 -[Xcode3InfoDictionarySliceController _mergeInfoDictionaries] (in Xcode3UI) 23 -[Xcode3InfoDictionarySliceController customPlistChanged:] (in Xcode3UI) 24 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation) 25 ___CFXRegistrationPost_block_invoke (in CoreFoundation) 26 _CFXRegistrationPost (in CoreFoundation) 27 _CFXNotificationPost (in CoreFoundation) 28 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) 29 -[Xcode3InfoEditorPlistDocument propertyListChanged:] (in Xcode3UI) 30 -[DVTPlistModel _setPlistNoCopy:forKeyPath:atIndex:doReplace:doNotify:] (in DVTKit) 31 -[DVTPlistModel setKey:forPlist:] (in DVTKit) 32 -[DVTPlistModel setLocalizedKey:forPlist:] (in DVTKit) 33 -[DVTPlistViewController outlineView:setObjectValue:forTableColumn:byItem:] (in DVTKit) 34 -[NSOutlineView _dataSourceSetValue:forColumn:row:] (in AppKit) 35 -[NSTableView _setNewObjectValueFromCell:ifNotEqualTo:forTableColumn:row:] (in AppKit) 36 -[NSTableView textDidEndEditing:] (in AppKit) 37 -[DVTPlistOutlineView textDidEndEditing:] (in DVTKit) 38 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation) 39 ___CFXRegistrationPost_block_invoke (in CoreFoundation) 40 _CFXRegistrationPost (in CoreFoundation) 41 _CFXNotificationPost (in CoreFoundation) 42 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) 43 -[NSTextView(NSSharing) resignFirstResponder] (in AppKit) 44 -[NSWindow _realMakeFirstResponder:] (in AppKit) 45 -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:] (in AppKit) 46 -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] (in AppKit) 47 -[NSWindow(NSEventRouting) sendEvent:] (in AppKit) 48 -[IDEWorkspaceWindow sendEvent:] (in IDEKit) 49 -[NSApplication(NSEvent) sendEvent:] (in AppKit) 50 -[IDEApplication sendEvent:] (in IDEKit) 51 -[NSApplication _handleEvent:] (in AppKit) 52 -[NSApplication run] (in AppKit) 53 -[DVTApplication run] (in DVTKit) 54 NSApplicationMain (in AppKit) 55 start (in dyld) ProductBuildVersion: 13E5104i abort() called

I’m currently migrating my app to use the concurrency model in Swift. I want to serialize Tasks to make sure they are executed one after the other (no paralellism). In my use case, I want to listen to notifications posted by the NotificationCenter and execute a Task every time a new notification is posted. But I want to make sure no previous task is running. It's the equivalent of using an OperationQueue with maxConcurrentOperationCount = 1. For example, I’m using CloudKit with Core Data in my app and I use persistent history tracking to determine what changes have occurred in the store. In this Synchronizing a Local Store to the Cloud Sample Code, Apple uses an operation queue for handling history processing tasks (in CoreDataStack). This OperationQueue has a maximum number of operations set to 1. private lazy var historyQueue: OperationQueue = { let queue = OperationQueue() queue.maxConcurrentOperationCount = 1 return queue }() When a Core Data notification is received, a new task is added to this serial operation queue. So if many notifications are received, they will all be performed one after the other one in a serial way. @objc func storeRemoteChange(_ notification: Notification) { // Process persistent history to merge changes from other coordinators. historyQueue.addOperation { self.processPersistentHistory() } } In this Loading and Displaying a Large Data Feed Sample Code, Apple uses Tasks to handle history changes (in QuakesProvider). // Observe Core Data remote change notifications on the queue where the changes were made. notificationToken = NotificationCenter.default.addObserver(forName: .NSPersistentStoreRemoteChange, object: nil, queue: nil) { note in Task { await self.fetchPersistentHistory() } } I feel something is wrong in the second project as Tasks could happen in any order, and not necessarily in a serial order (contrary to the first project where the OperationQueue as a maxConcurrentOperationCount = 1). Should we use an actor somewhere to make sure the methods are serially called? I thought about an implementation like this but I’m not yet really comfortable with that: actor PersistenceStoreListener { let historyTokenManager: PersistenceHistoryTokenManager = .init() private let persistentContainer: NSPersistentContainer init(persistentContainer: NSPersistentContainer) { self.persistentContainer = persistentContainer } func processRemoteStoreChange() async { print("\(#function) called on \(Date.now.formatted(date: .abbreviated, time: .standard)).") } } where the processRemoteStoreChange method would be called by when a new notification is received (AsyncSequence): notificationListenerTask = Task { let notifications = NotificationCenter.default.notifications(named: .NSPersistentStoreRemoteChange, object: container.persistentStoreCoordinator) for await _ in notifications { print("notificationListenerTask called on \(Date.now.formatted(date: .abbreviated, time: .standard)).") await self.storeListener?.processRemoteStoreChange() } }

Hello, I'm currently adding StoreKit 2 into my app. I've watched the WWDC21 session (Meet SK2) and downloaded the sample SKDemo app. When I want to test the Ask To Buy flow, it does not work: I see the sheet on the device, I see the alert and tap on the "Ask" button. In Xcode, I then approve the transaction but the func listenForTransactions() -> Task<Void, Error> is never called. I'm testing the app in Debug mode, on a real device and on a simulator (using the Products.storekit local configuration file). What's wrong? Thanks, Axel Version 13.2 beta 2 (13C5081f) iOS 15.2 (19C5044b) func listenForTransactions() -> Task<Void, Error> {         return Task.detached {             for await result in Transaction.updates {                 do {                     let transaction = try self.checkVerified(result)                     await self.updatePurchasedIdentifiers(transaction)                     await transaction.finish()                 } catch {                     print("Transaction failed verification")                 }             }         }     }

Hello, I want to access the latest transaction for a Subscription Group. I use the following method static func status(for groupID: String) async throws -> [Product.SubscriptionInfo.Status] to access the statuses for the group, and from there, I can get a verified transaction from the status. But when I set the GroupID equal to the Subscription Group Reference Name I put in the .storekit configuration file in Xcode, I don't have any status (so wrong ID). Actually, I have to use a subscriptionGroupID like 3F19ED53 (found using a previous transaction: https://developer.apple.com/documentation/storekit/transaction/3749718-subscriptiongroupid). When I look into a Product, this ID is set for subscriptionFamilyId. So my question is how can I know the ID if it's not the one I provided in App Store Connect or the config file? Do I first have to access a Product from this group? Thanks.

Hello, When 'Ask To Buy' is enabled, and the user cancels the request (left button on the provided screenshot below), the purchaseResult in iOS 15 is set to .pending when we call try await product.purchase(). It's wrong, it should be set to .userCancelled because the parent will never receive any approval request in this case. It breaks the logic in my app because tracking real pending requests is then not possible. I also think that a declined transaction should be made available to the app in the transactions observer: how can we remove a pending transaction that had been declined? We can't for the moment. Thanks, Axel

Hello, The app displays a list of posts (Post), and for each post, a list of tags (Tag). The Post detail view shows a list of tags for a given post. The Tag detail view shows the post name and the tag name. Both Post and Tag are ObservableObject, and both are passed to the environment when a NavigationLink is tapped. On the master List with all the posts, you tap on a post. The post is passed in the environment. It's working because the detail view for the selected post is correctly displayed, and you can choose to display a tag from the tags in the displayed post. But when you tap on a tag to view the details, the app crashes: the post object is not in the environment. No ObservableObject of type Post found. A View.environmentObject(_:) for Post may be missing as an ancestor of this view. Why? The post object in the PostView, so it should be also available in the TagView because the TagView can only be displayed from the PostView. Thanks Axel import SwiftUI class Store: ObservableObject {     @Published var posts: [Post] = [         Post(name: "Post 1", tags: [.init(name: "Tag 1"), .init(name: "Tag 2")]),         Post(name: "Post 2", tags: [.init(name: "Tag 1"), .init(name: "Tag 2")])     ] } class Post: ObservableObject, Identifiable, Hashable {     @Published var name: String = ""     @Published var tags: [Tag] = []     var id: String { name }     init(name: String, tags: [Tag]) {         self.name = name         self.tags = tags     }     static func == (lhs: Post, rhs: Post) -> Bool {         return lhs.id == rhs.id     }     func hash(into hasher: inout Hasher) {         hasher.combine(id)     } } class Tag: ObservableObject, Identifiable, Hashable {     @Published var name: String = ""     var id: String { name }     init(name: String) {         self.name = name     }     static func == (lhs: Tag, rhs: Tag) -> Bool {         return lhs.id == rhs.id     }     func hash(into hasher: inout Hasher) {         hasher.combine(id)     } } struct PassEnvironmentObject: View {     @StateObject private var store: Store = .init()     var body: some View {       NavigationStack {             List {                 ForEach(store.posts) { post in                     NavigationLink(post.name, value: post)                 }             }             .navigationDestination(for: Post.self) { post in                 PostView()                     .environmentObject(post)           }             .navigationDestination(for: Tag.self) { tag in                 TagView()                     .environmentObject(tag)             }         }     } } struct PostView: View {     @EnvironmentObject private var post: Post     var body: some View {         List {             ForEach(post.tags) { tag in                 NavigationLink(tag.name, value: tag)             }         }     } } struct TagView: View {     @EnvironmentObject private var post: Post     @EnvironmentObject private var tag: Tag     var body: some View {         VStack {             Text(post.name)             Text(tag.name)         }     } } struct PassEnvironmentObject_Previews: PreviewProvider {     static var previews: some View {         PassEnvironmentObject()     } }

I'm trying to use Previews in a Swift Package in Xcode 14b2 but it's not working (it was working in Xcode 13). I have the following error message but I don't know how to solve it. "XCPreviewAgent.app" must be code signed in order to use on-device previews. Check your code signing settings for the target. com.apple.dt.UVPreviewAgent-watchOS.watchkitapp {     url: file:///Applications/Xcode-beta.app/Contents/Developer/Platforms/WatchOS.platform/Developer/Library/Xcode/Agents/XCPreviewAgent.app     version: 20.0.32.2     attributes: [         ObjectIdentifier(0x00000001638e5d18): ["OS_ACTIVITY_DT_MODE": "YES", "SQLITE_ENABLE_THREAD_ASSERTIONS": "1"],     ] }

Hello I’ve a question regarding CLLocationManager as I’m observing a strange behaviour when receiving location updates. And I don’t really know what could be the culprit here. Some information regarding the device: Device: iPhone Xs Max OS: iOS 16.1 beta 4 App Background Modes: locations updates checked. CLLocationManager setup: CLAuthorizationStatus: authorizedWhenInUse CLAccuracyAuthorization: fullAccuracy allowsBackgroundLocationUpdates is ON pausesLocationUpdatesAutomatically is OFF (but toggle to turn in on in the POC) activityType (CLActivityType): .otherNavigation (but tried other options). desiredAccuracy (CLLocationAccuracy) : kCLLocationAccuracyNearestTenMeters (to receive GPS updates, and not cell towers) distanceFilter CLLocationDistance): kCLDistanceFilterNone (-1) or 0. When I record with the device unlocked, everything is working fine with the app either in foreground or in background. It receives location updates as I walk around with quite good accuracy (between 5 and 15 meters, see attachment). But I notice that when the device is locked in my pocket, the location service stops receiving updates after a while (like few minutes). I tried with Wi-Fi off and it behaves the same. You can see that in my screenshots attached: many values are incorrect (speed, course). When I open the app again (not crashed), the locations are received again but the horizontalAccuracy is not very good: it’s as if it was not using the GPS anymore. I tried with low power mode enabled and disabled, and I think it behaves the same but maybe not? Is the low power mode responsible for this discrepancies?  As far as I know, it does not modify location services accuracy (only network, background tasks, etc.). Thanks