I referred to the code provided in the article Adding and Editing Persistent Data in Your App in the SwiftData documentation and tested the "/PreviewHelper" approach. I found that if a model class contains a property of a struct, and that struct includes a Set property or an Array property, the Preview would throw an error. Here is an example of the model: @Model class Book { // ... var someStruct: SomeStruct // ... } struct SomeStruct: Codable { // ... var someCollection: Set<Int> // ... } In actuality, this model can run and store data without any issues, but it fails to run in the Preview. Is there a problem with the implementation of this Preview or is there any other reason? Are there better ways to perform Preview in SwiftData?

I know that this has been posted many times, but I am facing an issue where I can't save a model instance. I know that this is due to enums from others trying to find solutions. The error that shows: CoreData: error: Row (pk = 2) for entity 'ResidentInfo' is missing mandatory text data for property 'name' Solutions that I've tried: removed all enums from their respective structs to being standalone. making sure all enum calls use the full keyPath removing CustomStringConvertible from all enums and moving them to rawValue strings updating Xcode to 15.4b probably other things I've forgotten at this point File is too long to fit in post or comments (I'm sorry it's insanely long, it's a complex model), so I'll try to fit what I can where, are there anythings that stand out that may be an issue? Enums: enum Gender: String, CaseIterable, Codable { case male = "Male" case female = "Female" case transmale = "Trans Male" case transfemale = "Trans Female" case nonbinary = "Nonbinary" case other = "Other" } enum BodyBuild: String, CaseIterable, Codable { case small = "Small" case medium = "Medium" case large = "Large" } enum Status: String, Codable { case incomplete, complete } enum HairColor: String, CaseIterable, Codable { case black = "Black" case blonde = "Blonde" case dirtyBlonde = "Dirty Blonde" case brown = "Brown" case lightBrown = "Light Brown" case darkBrown = "Dark Brown" case red = "Red" } enum EyeColor: String, CaseIterable, Codable { case blue = "Blue" case brown = "Brown" case black = "Black" case green = "Green" case hazel = "Hazel" case gray = "Gray" case heterochromatic = "Heterochromatic" } enum RaceEthnicity: String, CaseIterable, Codable { case native = "American Indian or Alaska Native" case asian = "Asian" case black = "Black or African American" case pi = "Native Hawaiian or Other Pacific Islander" case white = "White" case mixed = "2 or More Races/Mixed" } enum MarkType: String, CaseIterable, Codable { case birthMark = "Birth Mark" case scar = "Scar" case tattoo = "Tattoo" case piercing = "Piercing" case other = "Other" } enum heightFormatStyle: String { case short, long, hash } enum suicideRiskLevel: String, Codable { case low = "Low" case medium = "Medium" case high = "High" } enum MedicationFrequency: String, CaseIterable, Codable { case daily = "Daily" case weekly = "Weekly" case biweekly = "Bi-Weekly" case monthly = "Monthly" case asNeeded = "As Needed" case temporary = "Temporary Use" case other = "Other" } enum SchoolOption: String, CaseIterable, Codable { case ged = "GED" case communityCollege = "Community College" case university = "4-Year College" } enum FamilyDiseaseTypes: String, CaseIterable, Codable { case alcoholism = "Alcoholism" case asthma = "Asthma" case cancer = "Cancer" case drugAbuse = "Drug Abuse" case hypertension = "High Blood Pressure" case nervousBreakdown = "Nervous Breakdown" case sca = "Sickle Cell Anemia" case seizures = "Convulsions, Seizures Epilepsy" case allergies = "Allergies" case birthDefect = "Birth Defect" case diabetes = "Diabetes" case heartDisease = "Heart Disease" case migraines = "Migraine Headaches" case obesity = "Obesity" case tuberculosis = "Tuberculosis" case thyroid = "Glandular/Thyroid Issues" } Structs: struct IdentifyingInformation: Codable { var hairColor: HairColor = HairColor.black var height: Height = Height(feet: 5, inches: 8) var race: RaceEthnicity = RaceEthnicity.native var build: BodyBuild = BodyBuild.small var eyeColor: EyeColor = EyeColor.blue var hispanic: Bool = false var distinguishingMarks: [DistinguishingMark] = [] var currentLivingSitutation: String = "" var currentSupportServices: String = "" struct DistinguishingMark: Codable, Identifiable { var id: UUID = UUID() var type: MarkType = MarkType.tattoo var location: String = "" var description: String = "" var photos: [Data] = [] } struct Height: Codable { var feet: Int var inches: Int func formatted(formatStyle: HeightFormatStyle = .short) -> String { switch formatStyle { case HeightFormatStyle.hash: return "\(feet)'\(inches)\"" case HeightFormatStyle.long: return "\(feet) feet \(inches) inches" case HeightFormatStyle.short: return "\(feet)ft \(inches)in" } } } } struct EmergencyNeeds: Codable { var food: Bool = false var shelter: Bool = false var clothing: Bool = false var hygeine: Bool = false var medical: Bool = false var mentalHealth: Bool = false var otherNeeds: String = "" var abuseNeglectAllegations: Bool = false var abuseReport: AbuseReport? = nil struct AbuseReport: Codable { var reportAccepted: Bool = false var whoAccepted: String = "" var reportNumber: String = "" } } struct RiskAssessment: Codable { var selfHarm: Bool = false var selfHarmAttempt: Bool = false var selfHarmExplanation: String? = nil var currentFeelings: String? = nil var dangerToOthers: Bool = false var dangerToOthersExplanation: String? = nil var suicideAssessmentRequired: Bool { return selfHarm || dangerToOthers } } struct SuicideAssessment: Loopable, Codable { var dateCompleted: Date = Date() var familyMember: Bool = false var treatedMentalIllness: Bool = false var chronicIllness: Bool = false var historyOfSelfDestructiveBehavior: Bool = false var recentLoss: Bool = false var isolatedAloneHopeless: Bool = false var goodbyeNoteOrPosessionDelegation: Bool = false var plan: Bool = false var betterOff: Bool = false var wishToDie: Bool = false var manualReview: Bool = false var comments: String = "" var helpCallMade: Bool = false var riskLevel: suicideRiskLevel { let riskScore = try? allProperties().reduce(0) { result, property in if let isTrue = property.value as? Bool, isTrue { return result + 1 } else { return result } } switch riskScore! { case 0 ... 3: return .low case 4 ... 7: return .medium default: return .high } } } [Continued in comments]

Hi, I'm new to Swift development and encountering an issue that I believe may be due to an error on my part. I have two questions regarding the following code: import AppIntents import SwiftUI import SwiftData @available(iOS 17.0, *) struct CopiarEventoIntent: AppIntent { @Environment(\.modelContext) private var context @Parameter(title: "Nome do Evento") var name: String @Parameter(title: "Data Inicial") var datai: Date @Parameter(title: "Data Final") var dataf: Date @Parameter(title: "Tipo de Evento") var tipo: String @Parameter(title: "Endereço") var endereco: String @Parameter(title: "Lembrete") var reminder: Bool static var title: LocalizedStringResource = "Adicionar Eventos" static var description = IntentDescription("Copiar Eventos e alterar datas", resultValueName: "Resultado") @MainActor func perform() async throws -> some IntentResult & ProvidesDialog { let calData = CalData(title: name, datei: datai, datef: dataf, tipo: tipo, endereco: endereco,reminder: reminder) context.insert(calData) return .result(dialog: "Evento copiado com sucesso!") } } @available(iOS 15.0, *) struct AppShortcuts: AppShortcutsProvider { static var appShortcuts: [AppShortcut] { AppShortcut( intent: CopiarEventoIntent(), phrases: [ "Copiar Evento" ], shortTitle: "Copiar Evento", systemImageName: "square.and.arrow.down" ) } } @available(iOS 15.0, *) struct ShortcutSelectionView: View { @Environment(\.modelContext) private var context @Query(sort: \CalData.title) private var caldatas: [CalData] @State private var selectedEvent: CalData? var body: some View { List(caldatas, id: \.self) { eventData in Button(action: { selectedEvent = eventData handleEventSelection() }) { Text(eventData.title) } } } private func handleEventSelection() { guard selectedEvent != nil else { return } } } When I run the shortcut, gives me the following error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Cannot insert 'CalData' in this managed object context because it is not found in the associated managed object model. I attempted to save this using SwiftData with the following model: import SwiftData @Model class CalData { var title : String var datei : Date var datef : Date var tipo : String var endereco : String @Relationship(deleteRule: .cascade) var caldataval = [CalDataVal]() var reminder: Bool = false init(title:String, datei:Date, datef:Date, tipo:String, endereco:String, reminder:Bool){ self.title = title self.datei = datei self.datef = datef self.tipo = tipo self.endereco = endereco self.reminder = reminder } } As for the second question, how can I add a parameter that can have multiple values to save them to EventDataVal, resembling a one-to-many relationship: import SwiftData @Model class CalDataVal { var name : String var value : Double init(name:String, value:Double){ self.name = name self.value = value } } Thanks in advanced

Hello, I have been working on SwiftData since a month now and i found very weird that every time i update a data inside a SwiftData model my app became very slow. I used the instrument if something was wrong, and i see memory increasing without releasing. My app have a list with check and unchecked elements (screeshot below). I just press check and unchecked 15 times and my memory start from 149mb to 361mb (screenshots below). For the code i have this model. final class Milestone: Identifiable { // ********************************************************************* // MARK: - Properties @Transient var id = UUID() @Attribute(.unique) var uuid: UUID var text: String var goalId: UUID var isFinish: Bool var createdAt: Date var updatedAt: Date var goal: Goal? init(from todoTaskResponse: TodoTaskResponse) { self.uuid = todoTaskResponse.id self.text = todoTaskResponse.text self.goalId = todoTaskResponse.goalId self.isFinish = todoTaskResponse.isFinish self.createdAt = todoTaskResponse.createdAt self.updatedAt = todoTaskResponse.updatedAt } init(uuid: UUID, text: String, goalId: UUID, isFinish: Bool, createdAt: Date, updatedAt: Date, goal: Goal? = nil) { self.uuid = uuid self.text = text self.goalId = goalId self.isFinish = isFinish self.createdAt = createdAt self.updatedAt = updatedAt self.goal = goal } } For the list i have var milestonesView: some View { ForEach(milestones) { milestone in MilestoneRowView(task: milestone) { milestone.isFinish.toggle() } .listRowBackground(Color.backgroundComponent) } .onDelete(perform: deleteMilestone) } And this is the cell struct MilestoneRowView: View { // ********************************************************************* // MARK: - Properties var task: Milestone var action: () -> Void init(task: Milestone, action: @escaping () -> Void) { self.task = task self.action = action } var body: some View { Button { action() } label: { HStack(alignment: .center, spacing: 8) { Image(systemName: task.isFinish ? "checkmark.circle.fill" : "circle") .font(.title2) .padding(3) .contentShape(.rect) .foregroundStyle(task.isFinish ? .gray : .primary) .contentTransition(.symbolEffect(.replace)) Text(task.text) .strikethrough(task.isFinish) .foregroundStyle(task.isFinish ? .gray : .primary) } .foregroundStyle(Color.backgroundComponent) } .animation(.snappy, value: task.isFinish) } } Does someone have a idea? Thanks

The deletion is working, but it does not refresh the view. This is similar to a question I asked previously but I started a new test project to try and work this out. @Model class Transaction { var timestamp: Date var note: String @Relationship(deleteRule: .cascade) var items: [Item]? init(timestamp: Date, note: String, items: [Item]? = nil) { self.timestamp = timestamp self.note = note self.items = items } func getModifierCount() -> Int { guard let items = items else { return 0 } return items.reduce(0, {result, item in result + (item.modifiers?.count ?? 0) }) } } @Model class Item { var timestamp: Date var note: String @Relationship(deleteRule: .nullify) var transaction: Transaction? @Relationship(deleteRule: .noAction) var modifiers: [Modifier]? init(timestamp: Date, note: String, transaction: Transaction? = nil, modifiers: [Modifier]? = nil) { self.timestamp = timestamp self.note = note self.transaction = transaction self.modifiers = modifiers } } @Model class Modifier { var timestamp: Date var value: Double @Relationship(deleteRule: .nullify) var items: [Item]? init(timestamp: Date, value: Double, items: [Item]? = nil) { self.timestamp = timestamp self.value = value self.items = items } } struct ContentView: View { @Environment(\.modelContext) private var context @Query private var items: [Item] @Query private var transactions: [Transaction] @Query private var modifiers: [Modifier] @State private var addItem = false @State private var addTransaction = false var body: some View { NavigationStack { List { Section(content: { ForEach(items) { item in LabeledText(label: item.timestamp.formatAsString(), value: .int(item.modifiers?.count ?? -1)) } .onDelete(perform: { indexSet in withAnimation { for index in indexSet { context.delete(items[index]) } } }) }, header: { LabeledView(label: "Items", view: { Button("", systemImage: "plus", action: {}) }) }) Section(content: { ForEach(modifiers) { modifier in LabeledText(label: modifier.timestamp.formatAsString(), value: .currency(modifier.value)) } .onDelete(perform: { indexSet in indexSet.forEach { index in context.delete(modifiers[index]) } }) }, header: { LabeledView(label: "Modifiers", view: { Button("", systemImage: "plus", action: {}) }) }) Section(content: { ForEach(transactions) { transaction in LabeledText(label: transaction.note, value: .int(transaction.getModifierCount())) } .onDelete(perform: { indexSet in withAnimation { for index in indexSet { context.delete(transactions[index]) } } }) }, header: { LabeledView(label: "Transactions", view: { Button("", systemImage: "plus", action: {addTransaction.toggle()}) }) }) } .navigationTitle("Testing") .sheet(isPresented: $addTransaction, content: { TransactionEditor() }) } } } } Here's the scenario. Create a transaction with 1 item. That item will contain 1 modifier. ContentView will display Items, Modifiers, and Transactions. For Item, it will display the date and how many modifiers it has. Modifier will display the date and its value. Transactions will display a date and how many modifiers are contained inside of its items. When I delete a modifier, in this case the only one that exist, I should see the count update to 0 for both the Item and the Transaction. This is not happening unless I close the application and reopen it. If I do that, it's updated to 0. I tried to add an ID variable to the view and change it to force a refresh, but it's not updating. This issue also seems to be only with this many to many relationship. Previously, I only had the Transaction and Item models. Deleting an Item would correctly update Transaction, but that was a one to many relationship. I would like for Modifier to have a many to many relationship with Items, so they can be reused. Why is deleting a modifier not updating the items correctly? Why is this not refreshing the view? How can I resolve this issue?

Hi everyone, I'm trying to make use of a background actor in my SwiftUI project. Inserting data works with the ModelContainer's mainContext. Another context in a ModelActor, however, fails to write into the same database. I verify the results by opening the SQLite file on the file system. While the mainContext.insert call does indeed insert a row into the table, the ModelActor's context fails to do so. There is no error or message received in the ModelActor. The property autosaveEnabled is set to true. I wrote a sample project to reproduce the issue in isolation. It consists of a single source file that introduces the Model ToDo, the ToDoView, initializes the ModelContainer and ModelActor. Please find the source code below. Is there any mistake in my approach? import SwiftUI import SwiftData @Model final class ToDo { let title: String init(title: String) { self.title = title } } @main struct testSwiftDataApp: App { @State var modelContainer: ModelContainer @State var backgroundData: BackgroundDataActor init() { let modelContainer: ModelContainer = try! ModelContainer(for: ToDo.self) self.modelContainer = modelContainer self.backgroundData = BackgroundDataActor( modelContainer: modelContainer ) } var body: some Scene { WindowGroup { ToDoView(backgroundData: self.backgroundData) .modelContainer(modelContainer) } } } struct ToDoView: View { @Environment(\.modelContext) var modelContext @Query var todos: [ToDo] let backgroundData: BackgroundDataActor var modelContainer: ModelContainer { self.modelContext.container } var body: some View { VStack { Text("Add ToDo") TextField( "", text: .constant( "URL to database: " + "\(self.modelContainer.configurations.first!.url)" ) ) // This action will be invoked on the ModelActor's context Button { Task { let todo = ToDo(title: "Step 1") await self.backgroundData.store( id: todo.persistentModelID ) } } label: { Text("Create ToDo in background") } // This action will be invoked on the mainContext Button { Task { let todo = ToDo(title: "Step 2") self.modelContainer.mainContext.insert(todo) } } label: { Text("Create ToDo in foreground") } // Show the query results VStack { Text("Available ToDos") ForEach(self.todos) { Text($0.title) } } } } } @ModelActor actor BackgroundDataActor: ModelActor { func store(id: PersistentIdentifier) { print("Trying to save") print("Is auto save enabled: \(self.modelContext.autosaveEnabled)") if let dbo = self[id, as: ToDo.self] { self.modelContext.insert(dbo) try! self.modelContext.save() print("Saved into database") } } }

I have a TabView which consists of a few different tabs. One of which does an @Query to retrieve an array of Transaction models. These are then displayed in a list using a ForEach. struct TransactionsTab: View { @Query private var transactions: [Transaction] ... other code Section(content: { ForEach(transactions) { transaction in transaction.getListItem() } }, header: { LabeledView(label: "Recent Transactions", view: { ListButton(mode: .link(destination: { ListView(list: transactions) .navigationTitle("All Transactions") })) }) }) Transaction contains a different model called TransactionItem and that has a variable called amount. That amount variable is used in the getListItem() function to show how much the total transaction was in the list item. The issue is that I can delete a Transaction and the ForEach will update to reflect that. However, if I delete an TransactionItem separately, that getListItem() will not show that it's been deleted. The total amount shown will still be as if the TransactionItem was never deleted. It will only update when the app is closed and reopened. Below is the code that's ran when deleting a model, in this case a TransactionItem. // Deletes a single item private func delete() { deleteWarning = false if let item = itemToDelete { // If last item is being delete, dismiss the view if list.count == 1 { dismissView() } context.delete(item) context.saveContext() itemToDelete = nil } mode = .view } I would think that deleting the model and having it save will cause the transaction query to update. What's going on here to cause it to not update? By the way, saveContext() just calls the ModelContext save function. extension ModelContext { func saveContext() { do { try self.save() } catch { print("Could not save context: \(error.localizedDescription)") } } }

Hello, I developed an application that uses iBeacons to create events, however when the app is in the terminated state I notice that part of my code is activated but the rest of the process is not activated ex : ranging beacon and notification. Is there a way to completely wake up my app when it is in terminated state or at least send a notification to the user to inform them that the app must be opened to put it back in background state so that the app working correctly?

I have a driving tracking app I'm working on that properly starts tracking and logging location when the app is in the foreground or background. I use a buffer/queue to keep recent locations so when a trip ramps up to driving speed I can record that to work back to the start location just before the trip starts. This works great, however, in background mode when the user does not have the app open it will record locations but not until a significant location change is detected. The buffering I do is lost and the location only starts tracking several hundred yards or more after the trip has started. Does anyone have any suggestions or strategies to handle this chicken and the egg scenario?

Many of Apple's tutorials on SwiftData are written alongside SwiftUI, including the sample code. Would it be a bad idea to use SwiftData separately? If I don't use SwiftUI, would it be wiser to choose a different database instead?

I've been coding for a while after creating the project, but I can't remember clearly if I selected SwiftData initially.

I'm developing an application using SwiftUI and SwiftData. The app includes a pricing section, and I'd like it to have an initial default value for pricing. Additionally, when updating the app on the App Store, I also want to update the prices. However, I'd like users to have the option to create their own prices if they don't want to use the ones I suggest. I want to save these prices obtained from the user because I'll be using these values for some operations later on. I'm wondering how to achieve this. Should I use SwiftData or UserDefaults for managing the data, or should I save the prices to a JSON file? If I opt for saving to a JSON file, would it be possible to update the JSON file when updating the app? Please feel free to ask any questions. Thank you in advance for your responses.

iOS17 using swiftData & CloudKit. compiles correctly, then throws error "App installation failed: Unable To Install " Please try again later. Failed to load Info.plist from bundle at path ... /.../simulatorlocation/.app/Frameworks/SwiftData.framework/Info.plist: No such file or directory. same error occurs on physical device 15Pro running iOS17.5 how do I fix this? here is the error: Please try again later. Failed to load Info.plist from bundle at path /Users//Library/Developer/CoreSimulator/Devices/996C811C-EE2D-47AE-881A-D1D2FA830BCC/data/Library/Caches/com.apple.mobile.installd.staging/temp.kkR2I8/extracted/Payload/.app/Frameworks/SwiftData.framework; Extra info about "/Users//Library/Developer/CoreSimulator/Devices/996C811C-EE2D-47AE-881A-D1D2FA830BCC/data/Library/Caches/com.apple.mobile.installd.staging/temp.kkR2I8/extracted/Payload/.app/Frameworks/SwiftData.framework/Info.plist": Couldn't stat /Users//Library/Developer/CoreSimulator/Devices/996C811C-EE2D-47AE-881A-D1D2FA830BCC/data/Library/Caches/com.apple.mobile.installd.staging/temp.kkR2I8/extracted/Payload/.app/Frameworks/SwiftData.framework/Info.plist: No such file or directory

Hello. See the code below. struct ContentView: View { var body: some View { TabView { VehicleTab() .tabItem({ Label("Vehicles", systemImage: "car.fill")}) .modelContainer(for: Vehicle.self) TransactionsTab() .tabItem { Label("Transactions", systemImage: "dollarsign") } .modelContainer(for: Transaction.self) } } } Using the .modelContainer() in this way seems to be causing some issue. I was under the assumption that this would just create a container for each view. I get the error below in this configuration. If I comment out either one of the .modelContainer() modifiers, it works fine. Query encountered an error: Error Domain=NSCocoaErrorDomain Code=256 "The file “default.store” couldn’t be opened." Are you not able to do what I'm doing? Is there a way to have two separate containers?

I used Query(filter:sortBy:) and show them in the ListView. When I change the property of the model, because I fetched filtered and sorted array, the model immediately reflect the change and find its position. What I want is at initializing it fetches filtered and sorted array. And when I change the property nothing happens. But when I tap on refresh button, then the array should change. For example in ToDoList app, the array consists of not done works. when I tap done, it should stay until I refresh. Is it possible?

Hi, just trying to learn how to work with mainActor. I am in a need of analyzing users data with API service one a background. Whenever user saves a post into SwiftData, I need to analyze that posts asynchronously. Here is my current code, which by the way works, but I am getting warning here; actor DatabaseInteractor { let networkInteractor: any NetworkInteractor = NetworkInteractorImpl() func loadUserProfile() async -&gt; String { do { let objects = try await modelContainer.mainContext.fetch(FetchDescriptor&lt;ProfileSwiftData&gt;()) if let profileTest = objects.first?.profile { return profileTest } } catch { } return "" } I get a warning on let objects line. Warning: Non-sendable type 'ModelContext' in implicitly asynchronous access to main actor-isolated property 'mainContext' cannot cross actor boundary

Hey Everyone, I am working on this project and it has to be done really soon. I have 30 TextFields and I need it to be saved to the whole app so If I had 1 phone inputting it, it would sync to another one with the same text value in it. So say I put "Done" in one TextField on Phone 1 then it'll save and update on Phone 2. Please get back to me when someone can. I have been developing in Xcode for about 7 months now and I am just running into it right now! Thanks so much

iPad mini device with iPadOS 17.4.1. I get this failure on iPad mini device exclusively. I have universal app and I doesn't get this error neither on iPhone or any simulator or macOS. I tried to reset the iPad, still getting the error. The error happens when I send the app to background from the particular app screen. Here is the error: error: Store failed to load. <NSPersistentStoreDescription: 0x3004b4bd0> (type: SQLite, url: file:///dev/null) with error = Error Domain=NSCocoaErrorDomain Code=134060 "A Core Data error occurred." UserInfo={NSLocalizedFailureReason=The configuration named 'default' does not contain any entities.} with userInfo { NSLocalizedFailureReason = "The configuration named 'default' does not contain any entities."; } What error says is that it loaded the store from file:///dev/null, which is wrong. Basically it looses the model container which is added via modelContaner modificator to the root view. The error get caused particularly by the @Environment(\.modelContext) private var modelContext call in the view on which the failure occurs. This view is deep in the view hierarchy, and it get's created in the navigationDestination block. I fixed the error by supplying modelContainer one more time right on the view: .navigationDestination(for: File.self) { file in FileEditor(file: file) .modelContainer(FolderService.modelContainer) } I wonder, why can it loose the model container which is supplied on the root view?

Dear all, I'm quite new to SwiftUI. I have a view where I'd like to open a sheet to edit data in a List. Here below the code of the view: import SwiftUI import SwiftData struct SettingsView: View { @Query(sort: \Stagione.idStagione) private var usoStagione: [Stagione] @Environment(\.modelContext) private var context @State private var stagione = String(Calendar.current.component(.year, from: Date())) @State private var miaSquadra = "" @State private var categoria = "" @State private var selStagione = Set<Stagione>() @State private var modificaStagione = false var body: some View { NavigationStack { GroupBox("Stagione") { Form { TextField("Stagione:", text: $stagione) .frame(width: 150) TextField("Categoria:", text: $categoria) .frame(width: 400) TextField("Mia squadra:", text: $miaSquadra) .frame(width: 400) Button("Salva") { let nuovaStagione = Stagione(idStagione: stagione, categoriaStagione: categoria, miaSquadra: miaSquadra) context.insert(nuovaStagione) miaSquadra = "" categoria = "" stagione = String(Calendar.current.component(.year, from: Date())) } .frame(maxWidth: .infinity, alignment: .trailing) .buttonStyle(.borderedProminent) .disabled(categoria.isEmpty || miaSquadra.isEmpty) } List(selection: $selStagione) { ForEach(usoStagione, id: \.self) { stag in VStack(alignment: .leading) { Text("\(stag.idStagione)").font(.title2) Text("\(stag.miaSquadra)").foregroundStyle(.secondary) Text("\(stag.categoriaStagione)").foregroundStyle(.secondary) } } .contextMenu() { Button(action: { selStagione.forEach(context.delete) }) { Text("Cancella") } Button(action: { self.modificaStagione = true }) { Text("Modifica") } } } .sheet(isPresented: $modificaStagione) { ModificaStagione(stagione: Stagione) } .listStyle(.plain) .textFieldStyle(.roundedBorder) .padding() } } .padding() .textFieldStyle(.roundedBorder) .navigationTitle("Impostazioni") GroupBox("Squadre") { } } } #Preview { SettingsView() .environmentObject(NavigationStateManager()) .modelContainer(for: Stagione.self, inMemory: true) } While here below the code of the view ModificaStagione: import SwiftUI struct ModificaStagione: View { @Environment(\.dismiss) private var dismiss let stagione: Stagione @State private var idStagione = "" @State private var categoria = "" @State private var miaSquadra = "" @State private var vistaPrecedente = true var body: some View { VStack (alignment: .leading) { GroupBox { LabeledContent { TextField("", text: $categoria) .frame(width: 400) } label: { Text("Categoria:") } LabeledContent { TextField("", text: $miaSquadra) .frame(width: 400) } label: { Text("Mia squadra:") } if modifica { Button("Aggiorna dati") { stagione.idStagione = idStagione stagione.categoriaStagione = categoria stagione.miaSquadra = miaSquadra dismiss() } .buttonStyle(.borderedProminent) } } .padding() .textFieldStyle(.roundedBorder) .navigationTitle("Modifica dati stagione") } .onAppear { idStagione = stagione.idStagione categoria = stagione.categoriaStagione miaSquadra = stagione.miaSquadra } } var modifica: Bool { categoria != stagione.categoriaStagione || miaSquadra != stagione.miaSquadra } } In the "Setting" view I receive an error message when I call the view "Modifica Stagione "saying that "Cannot convert value of type 'Stagione.Type' to expected argument type 'Stagione'". What am I doing wrong? Thanks in advance, A.

Could you help me translate this logarithmic operation in the swift ui? Operation: