Hello, I'm planning to had an onboarding to one of my apps. I am thinking about a way for a user to not see the onboarding again if he installs the app on another device. So for example, the user completes the onboarding on its iPhone, then downloads the app on its iPad and launch it, he doesn't see the onboarding a second time. I thought about using iCloud NSUbiquitousKeyValueStored to store the onboarding completion state. But I'm not sure when the data is synced to the other device logged into the same Apple account: Immediately even if the app is not installed on the other device (independent from the app, only iCloud thing)? At the same time as the app install on the other device? After the app is first launched on the other device? Of course synchronisation will depend on the Internet connection, speed, etc. so the app should handle the case where the data is not here but what would be the best case scenario? Thank you, Axel

Hello, I'm working on an application that requires the use of significant location changes and visits, in addition to region monitoring and standard continuous location delivery (foreground and background). iOS 17 and iOS 18 introduced changes to how we can monitor distinct regions of interest (with CLMonitor) as well as receive location updates (with CLLocationUpdate). But I couldn't find any information regarding how to work with Significant location changes. Do we still need to create a location manager and call startMonitoringSignificantLocationChanges()? Where are the updates received in this case, in the locationManager(_:didUpdateLocations:) or in the liveUpdates async sequence? Visits. Same question here, for visit monitoring to work, do we still have to create a location manager then call startMonitoringVisits()? Where are the visits being notified? Still in locationManager(_:didVisit:) or in the liveUpdates asynchronous sequence? I just want to be sure I understand correctly how to use the updates, and if some features of Core Location still need to use a location manager and the delegate to receive the events. Maybe additional CLCondition will be added to cover both of these technologies as it seems highly related to monitoring conditions (significant location change, and visit). Thank you, Axel

Hello, I’m presenting the familyActivityPicker from a presented sheet in my application. When I select some apps, categories or websites and tap “Done”, the familyActivityPicker is dismissed but the presenting sheet is also dismissed on iOS 18.4, iOS 18.5, iOS 26 beta 1 and 2. If I tap on “Cancel” from the familyActivityPicker, the sheet is also dismissed on iOS 18.4, iOS 18.5, iOS 26 beta 1 and 2. The same code works perfectly fine on iOS 18.0, iOS 18.1, iOS 18.2 and iOS 18.3. Is this a known-issue? If opened the feedback FB18369821 for this. Regards, Axel

Hello, When archiving a binary with Xcode, I've always kept my archives in the Organizer so I can symbolicate crash logs using the dSYM files. I've been thinking about moving to Xcode Cloud for archiving. Will crash logs still be symbolicated and readable in the Xcode Organizer? Thank you, Axel

Hello, I've noticed the prices of my products in my Xcode synced StoreKit configuration are not updated when I change the price in App Store Connect. I tried to manually sync the file, to remove and add it again to my project but old initial prices are still used. In the screenshot below, the price is currently $2.99 but the file still uses the initial price of $1.99. It makes testing a little bit painful because I'm never sure which product is being shown. Is this a bug? Is there a way to get the live production App Store prices be used instead of the starting prices? I filed a feedback for this: FB17798486 Regards, Axel

Hello, I want to update the prices in all territories of an auto-renewable subscription at once (in a single request). I know it's possible to do it territory by territory using the Create a Subscription Price Change API endpoint, but this means I need to call this API for every territory. And I have a lot of subscriptions I need to update. There is an another API endpoint that seems to allow to Modify an Auto-Renewable Subscription. For the countries where I want to change the price, I fetch the subscription price points using the List All Price Points for a Subscription API endpoint. When I call this API endpoint with the following body (that is the expected body content for this endpoint): { "data": { "type": "subscriptions", "relationships": { "prices": { "data": [ { "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJDQU4iLCJwIjoiMTAwMDEifQ", "type": "subscriptionPrices" }, { "type": "subscriptionPrices", "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJVU0EiLCJwIjoiMTAwMDEifQ" } ] } }, "id": "6740021496" }, "included": [ { "relationships": { "subscriptionPricePoint": { "data": { "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJDQU4iLCJwIjoiMTAwMDEifQ", "type": "subscriptionPricePoints" } }, "territory": { "data": { "type": "territories", "id": "CAN" } }, "subscription": { "data": { "id": "6740021496", "type": "subscriptions" } } }, "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJDQU4iLCJwIjoiMTAwMDEifQ", "attributes": { "preserveCurrentPrice": true }, "type": "subscriptionPrices" }, { "attributes": { "preserveCurrentPrice": true }, "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJVU0EiLCJwIjoiMTAwMDEifQ", "type": "subscriptionPrices", "relationships": { "subscription": { "data": { "type": "subscriptions", "id": "6740021496" } }, "subscriptionPricePoint": { "data": { "type": "subscriptionPricePoints", "id": "eyJzIjoiNjc0MDAyMTQ5NiIsInQiOiJVU0EiLCJwIjoiMTAwMDEifQ" } }, "territory": { "data": { "type": "territories", "id": "USA" } } } } ] } I receive a 409 error: { "errors" : [ { "id" : "5b6a4b62-686c-4a65-87ba-e16131db517b", "status" : "409", "code" : "ENTITY_ERROR", "title" : "There is a problem with the request entity", "detail" : "User is not allowed to edit.", "source" : { "pointer" : "subscriptionPrices" } } ] } I made sure my bearer authorisation token is correct and still valid (not expired). the p8 key has Admin rights Can this PATCH endpoint be used for what I want to do? If yes, is there anything special to do to use this PATCH endpoint? Thanks, Axel

Hello, I'm trying to create a subscription for one of my apps. When I specify the Product ID yearly_3, I get the following error message: The Product ID you entered is already being used by another subscription. This app does not have any other subscriptions with this Product ID. But I have another app with a yearly_3 Product ID. According to the official documentation, the Product ID is A unique ID specific to your app. So I thought it was possible to have the same Product ID between apps, but not for the same app. What's the rule here? Thanks, Axel

Hello, I'm currently migrating my app location service to use the new CLLocationUpdate.Updates. I'm trying to understand what can fail in this AsyncSequence. Based on the previous CLError, I thought authorisation was one of them for example but it turns out that this is handled by the CLLocationUpdate where we can check different properties. So, is there a list of errors available somewhere? Thanks Axel, @alpennec

Hello, In my app, I have an onboarding made of multiple steps in a NavigationStack. I also have a state variable that controls an if else root branch to show either the onboarding NavigationStack or the app content if the onboarding is finished. I noticed that when I end the onboarding (i.e. I switch to the other part of the if else root branch), the onAppear of the first View in the NavigationStack of the onboarding is called again. I don’t understand why. Is this a bug? Thanks, Axel enum Step { case one case two case three case four } struct ContentView: View { @State private var isFinished: Bool = false @State private var steps: [Step] = [] var body: some View { if isFinished { Button("Restart") { steps = [] isFinished = false } } else { NavigationStack(path: $steps) { VStack { Text("Start") .onAppear { print("onAppear: start") } Button("Go to step 1") { steps.append(.one) } } .navigationDestination(for: Step.self) { step in switch step { case .one: Button("Go to step 2") { steps.append(.two) } .onAppear { print("onAppear: step 1") } case .two: Button("Go to step 3") { steps.append(.three) } .onAppear { print("onAppear: step 2") } case .three: Button("Go to step 4") { steps.append(.four) } .onAppear { print("onAppear: step 3") } case .four: Button("End") { isFinished = true } .onAppear { print("onAppear: end") } } } } .onAppear { print("onAppear: NavigationStack") } } } }

Hello, SwiftData is not working correctly with Swift Concurrency. And it’s sad after all this time. I personally found a regression. The attached code works perfectly fine on iOS 17.5 but doesn’t work correctly on iOS 18 or iOS 18.1. A model can be updated from the background (Task, Task.detached or ModelActor) and refreshes the UI, but as soon as the same item is updated from the View (fetched via a Query), the next background updates are not reflected anymore in the UI, the UI is not refreshed, the updates are not merged into the main. How to reproduce: Launch the app Tap the plus button in the navigation bar to create a new item Tap on the “Update from Task”, “Update from Detached Task”, “Update from ModelActor” many times Notice the time is updated Tap on the “Update from View” (once or many times) Notice the time is updated Tap again on “Update from Task”, “Update from Detached Task”, “Update from ModelActor” many times Notice that the time is not update anymore Am I doing something wrong? Or is this a bug in iOS 18/18.1? Many other posts talk about issues where updates from background thread are not merged into the main thread. I don’t know if they all are related but it would be nice to have 1/ bug fixed, meaning that if I update an item from a background, it’s reflected in the UI, and 2/ proper documentation on how to use SwiftData with Swift Concurrency (ModelActor). I don’t know if what I’m doing in my buttons is correct or not. Thanks, Axel import SwiftData import SwiftUI @main struct FB_SwiftData_BackgroundApp: App { var body: some Scene { WindowGroup { ContentView() .modelContainer(for: Item.self) } } } struct ContentView: View { @Environment(\.modelContext) private var modelContext @State private var simpleModelActor: SimpleModelActor! @Query private var items: [Item] var body: some View { NavigationView { VStack { if let firstItem: Item = items.first { Text(firstItem.timestamp, format: Date.FormatStyle(date: .omitted, time: .standard)) .font(.largeTitle) .fontWeight(.heavy) Button("Update from Task") { let modelContainer: ModelContainer = modelContext.container let itemID: Item.ID = firstItem.persistentModelID Task { let context: ModelContext = ModelContext(modelContainer) guard let itemInContext: Item = context.model(for: itemID) as? Item else { return } itemInContext.timestamp = Date.now.addingTimeInterval(.random(in: 0...2000)) try context.save() } } .buttonStyle(.bordered) Button("Update from Detached Task") { let container: ModelContainer = modelContext.container let itemID: Item.ID = firstItem.persistentModelID Task.detached { let context: ModelContext = ModelContext(container) guard let itemInContext: Item = context.model(for: itemID) as? Item else { return } itemInContext.timestamp = Date.now.addingTimeInterval(.random(in: 0...2000)) try context.save() } } .buttonStyle(.bordered) Button("Update from ModelActor") { let container: ModelContainer = modelContext.container let persistentModelID: Item.ID = firstItem.persistentModelID Task.detached { let actor: SimpleModelActor = SimpleModelActor(modelContainer: container) await actor.updateItem(identifier: persistentModelID) } } .buttonStyle(.bordered) Button("Update from ModelActor in State") { let container: ModelContainer = modelContext.container let persistentModelID: Item.ID = firstItem.persistentModelID Task.detached { let actor: SimpleModelActor = SimpleModelActor(modelContainer: container) await MainActor.run { simpleModelActor = actor } await actor.updateItem(identifier: persistentModelID) } } .buttonStyle(.bordered) Divider() .padding(.vertical) Button("Update from View") { firstItem.timestamp = Date.now.addingTimeInterval(.random(in: 0...2000)) } .buttonStyle(.bordered) } else { ContentUnavailableView( "No Data", systemImage: "slash.circle", // 􀕧 description: Text("Tap the plus button in the toolbar") ) } } .toolbar { ToolbarItem(placement: .primaryAction) { Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } } private func addItem() { modelContext.insert(Item(timestamp: Date.now)) try? modelContext.save() } } @ModelActor final actor SimpleModelActor { var context: String = "" func updateItem(identifier: Item.ID) { guard let item = self[identifier, as: Item.self] else { return } item.timestamp = Date.now.addingTimeInterval(.random(in: 0...2000)) try! modelContext.save() } } @Model final class Item: Identifiable { var timestamp: Date init(timestamp: Date) { self.timestamp = timestamp } }

Hello, I'm trying to understand how dangerous it is to read and/or update model properties from a thread different than the one that instantiated the model. I know this is wrong when using Core Data and we should always use perform/performAndWait before manipulating an object but I haven't found any information about that for SwiftData. Question: is it safe to pass an object from one thread (like MainActor) to another thread (in a detached Task for example) and manipulate it, or should we re fetch the object using its persistentModelID as soon as we cross threads? When running the example app below with the -com.apple.CoreData.ConcurrencyDebug 1 argument passed at launch enabled, I don't get any Console warning when I tap on the "Update directly" button. I'm sure it would trigger a warning if I were using Core Data. Thanks in advance for explaining. Axel -- @main struct SwiftDataPlaygroundApp: App { var body: some Scene { WindowGroup { ContentView() .modelContainer(for: Item.self) } } } struct ContentView: View { @Environment(\.modelContext) private var context @Query private var items: [Item] var body: some View { VStack { Button("Add") { context.insert(Item(timestamp: Date.now)) } if let firstItem = items.first { Button("Update directly") { Task.detached { // Not the main thread, but firstItem is from the main thread // No warning in Xcode firstItem.timestamp = Date.now } } Button("Update using persistentModelID") { let container: ModelContainer = context.container let itemIdentifier: Item.ID = firstItem.persistentModelID Task.detached { let backgroundContext: ModelContext = ModelContext(container) guard let itemInBackgroundThread: Item = backgroundContext.model(for: itemIdentifier) as? Item else { return } // Item on a background thread itemInBackgroundThread.timestamp = Date.now try? backgroundContext.save() } } } } } } @Model final class Item: Identifiable { var timestamp: Date init(timestamp: Date) { self.timestamp = timestamp } }

Hello, I'm currently developing an app using SwiftData. I want the app to use CloudKit to sync data, so I made sure all my model properties are optional. I've defined a Codable enum as follows: enum Size: Int, Codable { case small case medium case large } I've defined a Drink SwiftData model as follows: @Model class Drink { var name: String? var size: Size? init( name: String? = nil, size: Size? = nil ) { self.name = name self.size = size } } In one of my Views, I want to use a @Query to fetch the data, and use a Predicate to filter the data. The Predicate uses the size enumeration of the Drink model. Here is the code: struct DrinksView: View { @Query var drinks: [Drink] init() { let smallRawValue: Int = Size.small.rawValue let filter: Predicate<Drink> = #Predicate<Drink> { drink in if let size: Size = drink.size { return size.rawValue == smallRawValue } else { return false } } _drinks = Query(filter: filter) } var body: some View { List { ForEach(drinks) { drink in Text(drink.name ?? "Unknown Drink") } } } } The code compiles, but when I run the app, it crashes with the following error: Thread 1: Fatal error: Couldn't find \Drink.size!.rawValue on Drink with fields [SwiftData.Schema.PropertyMetadata(name: "name", keypath: \Drink.name, defaultValue: nil, metadata: nil), SwiftData.Schema.PropertyMetadata(name: "size", keypath: \Drink.size, defaultValue: nil, metadata: nil)] How can I filter my data using this optional variable on the Drink model? Thanks, Axel

Hello, I'm trying to clear the purchase history made with a sandbox Apple ID on my test device but it does not work. The past purchases are still returned by StoreKit. I've waited many hours but it seems to persist. When I use for await result in Transaction.currentEntitlements { in my app, my non-consumable product is still here. Is it expected? How long should it take to reset the history? Is is supposed to work also for non-consumable products? Thanks Axel

Hello, I want to use Automatic Grammar Agreement to localise a string in my app, let say "three remaining activities". The string "three" is obtained by using a NumberFormatter with a numberStyle set to .spellOut (so I'm not using an Integer) var formatter: NumberFormatter = NumberFormatter() formatter.numberStyle = .spellOut let formattedCount: String = numberFormatter.string(from: count as NSNumber)! Text("key_with_string_\(formattedCount)") In my string catalog, I have translated the key key_with_string_%@ like this ^[%@ remaining activity](inflect: true), but it does not work. I've tried to add the integer value used by the number formatter in the key key_with_string_%@_%lld but it does not work. Should Automatic Grammar Agreement work normally just by using the formatted string provided by the NumberFormatter? If not, is there a way to specify to use a secondary variable (my count integer) to switch between different categories like one and other automatically? Thanks ! Axel

Hello, I want to understand how listSectionSpacing with a custom CGFloat value works in SwiftUI. According to the documentation, we can use different spacing between sections and If adjacent sections have different spacing value, the smaller value on the shared edge is used. For example, if I have a: Section A with a listSectionSpacing of 10 Section B with a listSectionSpacing of 200 Section C with a listSectionSpacing of 20 Section D with a listSectionSpacing of 0 I notice the spacing between the sections A+B and B+C is none of 10, 200 or 20. If the documentation is correct, shouldn't it be 10? If I now have a: Section A with a listSectionSpacing of 200 Section B with a listSectionSpacing of 200 Section C with a listSectionSpacing of 200 Section D with a listSectionSpacing of 0 I notice the spacing is never 200. Is the spacing capped? Also, if I specify a header and footer, the spacing doesn't seem to be used at all. Thus the spacing is the same for all sections. Is my understanding wrong and this API working as expected? Or is that a bug in how the spacing is used? I filed #FB13699952 few weeks ago. Axel struct ListSections: View { @State private var header: Bool = false @State private var footer: Bool = false private let sections: [ListSection] = [ ListSection(position: "A", spacing: 200), ListSection(position: "B", spacing: 200), ListSection(position: "C", spacing: 200), ListSection(position: "D", spacing: 0) ] var body: some View { VStack { Toggle("Header", isOn: $header) Toggle("Footer", isOn: $footer) } .padding(.horizontal) List { ForEach(sections) { section in Section { LabeledContent("Section \(section.position)", value: section.spacing.formatted()) } header: { if header { Text("Header \(section.position)") .background(.red.opacity(0.3)) } } footer: { if footer { Text("Footer \(section.position)") .background(.green.opacity(0.3)) } } .listSectionSpacing(section.spacing) } } } } #Preview { ListSections() }