ForEach(lessons) { lesson in ...} is not a "normal" for loop. It is a View that needs to have other Views in it, not procedural code like you have. Put this type of code (using a "normal" for loop`), for example in .onAppear{ lessons.forEach{ lesson in ...} } Note that NavigationView is deprecated, use NavigationStack instead.

If you cannot import Observation or import SwiftData it's because you do not have the required environment/target settings, such as target iOS 17, macOS 14. As mentioned in the comments in your StackOverflow question.

Use .sheet(item: ...) instead, or capture the variable, like .sheet(isPresented: $isEditPresented) { [cardIndex] in ...}. Note, no need for @State in your EditCardView

Use .sheet(item: ...) instead, or capture the variable, like .sheet(isPresented: self.$showSheet) { [selectedItem] in ...}

Also you should have "@Published var items : [Item] = []" note, NO s in "[Item]". Conversely, in your delete, use "items.remove(at: index)"

If you have @StateObject var items: ItemModel = .init() in your ContentView, you should pass this model to the other views, for example @ObservedObject var items: ItemModel in your ItemView. Also you should have in your Observable class, items.append(Item(id: id, category: [category], image: image)) not Piercing(...). Currently you create a new and different ItemModel every time you show ItemView

try using "struct ValueWrapper { var value = true } " instead of nesting "ObservableObject". Assuming you have declared "@StateObject var viewModel = ViewModel()" in the ContentView parent.

use TextField("Age", value: $model.age, formatter: nf). See the docs for the differences between the two versions, TextField, in particular the text version does not take a formatter

With the first method you are changing the checkItems array directly using the index and all works well, but using an index is not a recommended way. To achieve the same with the second (preferred) method, you need to have a binding for the item to be able to change it. To have that, use ForEach($checkItems) { $item in ....}

You could use the ObservableObject directly, there is no need for anything else, it is made to be use like in this example code: struct ContentView: View { var body: some View { BottomSheetView() } } class Movie: ObservableObject{ @Published var name: String = "" @Published var director: String = "" @Published var stars: Double = 0.0 @Published var review: String = "" // no need for all the functions } struct BottomSheetView:View{ @StateObject var newMovie = Movie() var body: some View { VStack(alignment: .leading) { Text("Add Movie") .fontWeight(.bold) .font(.system(size:30)) .padding() TextField("Movie name", text: $newMovie.name) // <--- here, etc... TextField("Movie director", text: $newMovie.director) // for testing, print to the console Button("show me") { print("\n---> newMovie: \(newMovie.name) \(newMovie.director) \n") } } } }

Try this code, works for me. struct ContentView: View { @State private var results = [DictionaryWord]() var body: some View { VStack { Text("API Example iOS Application") List(results) { item in VStack(alignment: .leading) { Text(item.word).font(.headline) ForEach(item.phonetics) { phone in // <--- here if phone.text != nil { Text(phone.text!) } } } } } .task { await loadData() } } let freeDictionaryURL = "https://api.dictionaryapi.dev/api/v2/entries/en/hello" func loadData() async { guard let url = URL(string: freeDictionaryURL) else { print("Invalid URL") return } do { let (data, _) = try await URLSession.shared.data(from: url) // --- here let decoded: [DictionaryWord] = try JSONDecoder().decode([DictionaryWord].self, from: data) results = decoded } catch { print(error) // <--- important } } } struct DictionaryWord: Identifiable, Codable { // <--- here let id = UUID() let word: String let phonetics: [Phonetic] let meanings: [Meaning] let license: License let sourceUrls: [String] enum CodingKeys: String, CodingKey { case word, phonetics, meanings, license, sourceUrls } } struct License: Codable { let name: String let url: String } struct Meaning: Codable { let partOfSpeech: String let definitions: [Definition] let synonyms, antonyms: [String]? } struct Definition: Codable { let definition: String let synonyms, antonyms: [String]? let example: String? } struct Phonetic: Identifiable, Codable { // <--- here let id = UUID() let audio: String let sourceURL: String? let license: License? let text: String? enum CodingKeys: String, CodingKey { case audio case sourceURL = "sourceUrl" case license, text } }

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try adding .navigationViewStyle(.stack) to your NavigationView

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Make your getHomeItems() with a closure when done, and try something like this: .onAppear { self.showLoading = true DispatchQueue.main.async { store.getHomeItems() { _ in // <--- here self.showloading = false // <--- here } } ... }