I've changed class FrameModel: NSObject, NSCoding { } into class FrameModel: NSObject, NSSecureCoding { class var supportsSecureCoding: Bool { true } } Muchos thankos, eskimo.

It's not working because parent.color in Coordinator is not returned to UIColorPickerViewController. Use a Binding variable in Coordinator to pass the selected color back to UIColorPickerViewController. Besides, why do you use UIColorPickerViewController to access UIColorPickerViewController? SwiftUI has a guy named ColorPicker.

You aren't using the selectedValue variable in ContentView. So nobody knows how the selectedValue variable in MyPicker is supposed to affect ContentView. If the selectedValue variable in MyPicker is supposed to affect ContentView, then make it Binding.

I am able to use the contextMenu guy to navigate to another View. Do I miss something? import SwiftUI struct ContentView: View { var body: some View { NavigationStack { FirstView() } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } struct FirstView: View { @State var goToSecond = false var body: some View { VStack { Text("FirstView") .contextMenu { Button("Go to Second View") { goToSecond.toggle() } } } .navigationDestination(isPresented: $goToSecond) { SecondView() } } } struct SecondView: View { var body: some View { VStack { Text("SecondView") } } }

What is screenCoord? Where does it come from?

You aren't really telling what you are trying to do. No screenshot? Why are you applying the height value you get from the gray rectangle to the other?

I think another approach is use of an ObservableObject class with onReceive(_:perform:) .

The following works. Picker(selection: $selectedYear) { ForEach(viewModel.years.indices, id: \.self) { Text("\(viewModel.years[$0])") } } label: { }

import SwiftUI struct ProviderCalendarView: View { @StateObject var viewModel = YearViewModel() @State private var selectedYear = 3 var body: some View { VStack { HStack { Picker(selection: $selectedYear) { ForEach(viewModel.years, id: \.self) { year in Text("\(year)") } } label: { } } } } } class YearViewModel: ObservableObject { @Published var years: [Int] = [] init() { createYears() } func createYears() { let now = Date() for i in 0..<4 { years.append(2023 + i) } } } I don't use Range to create an array in this case. Yet, I still get the same compiler guy.

Silly me... func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let fileContent = try JSONEncoder().encode(self.document) return FileWrapper(regularFileWithContents: fileContent) }

Hmm... Maybe let fileWrapper = FileWrapper(directoryWithFileWrappers: [filename: jsonFileWrapper]) is wrong?

I think I've fixed it. import SwiftUI struct ContentView: View { @State var selectedTab = 0 @State var addTapped = false @State var refresh = false @State var people = [ Person(name: "Alice", systemImage: "person.circle.fill"), Person(name: "Jane", systemImage: "person.circle.fill"), Person(name: "Dave", systemImage: "person.circle.fill"), Person(name: "Susan", systemImage: "person.circle.fill"), Person(name: "Robert", systemImage: "person.circle.fill"), Person(name: "Daniel", systemImage: "person.circle.fill") ] var body: some View { VStack(alignment: .leading, spacing: 0) { ScrollView(.horizontal) { HStack(spacing: 20) { ForEach(0..<people.count, id: \.self) { num in VStack { ... } .foregroundColor(selectedTab == num ? Color.blue : Color.gray) .onTapGesture { self.selectedTab = num } } } }.padding(.horizontal, 10) Spacer() .frame(height: 2) Rectangle().fill(.gray) .frame(height: 1) TabView(selection: $selectedTab) { ForEach(0..<people.count, id: \.self) { num in let person = people[num] Text(person.name) .tag(person.id) } } } .tabViewStyle(.page(indexDisplayMode: .never)) // <<<<<<<<<<<<<<<<<<<<< .onAppear { UITabBar.appearance().isHidden = true } } }

I think my topic is related to https://developer.apple.com/forums/thread/697197 .

Thank you for your reply. Yes and no. I've figured out that I can do it by having an additional Date attribute. So I've started with a new Xcode project by having a new Date attribute named createdAt. And code goes as follows. import SwiftUI struct ContentView: View { @Environment(\.managedObjectContext) var managedObject @FetchRequest(sortDescriptors: [NSSortDescriptor(keyPath: \Student.createdAt, ascending: true)]) var students: FetchedResults<Student> var body: some View { VStack { List(students) { student in Text(student.name ?? "") } Button { let firstNames = ... let lastNames = ... if let selectedFirstName = firstNames.randomElement(), let selectedLastName = lastNames.randomElement() { let newStudent = Student(context: managedObject) newStudent.id = UUID() newStudent.name = "\(selectedFirstName) \(selectedLastName)" newStudent.createdAt = Date() // <<<<<<<<<<<<<<<<<<<<<< try? managedObject.save() } } label: { Text("Add") } } } } , which takes care of the sort issue. As for the older project shown above, I wonder if Core Data has a simple mechanism in reordering the records when the entity does not include an additional Date attribute? That was my initial question.

No, I haven't. I don't even remember having posted this question although I know what this case is about.