👀 Views: 36 💬 Answers: 1 📅 Created: 2025-06-05

swift swiftui observableobject

I'm deploying to production and I've been struggling with this for a few days now and could really use some help. I'm working with an scenario with a SwiftUI `List` that relies on an `ObservableObject` for its data source. After I make an API call to fetch a list of items, the UI does not update even though the data is being fetched successfully. I'm using `@Published` properties in my view model, but it seems like SwiftUI is not re-rendering the `List` when the data changes. Here's a snippet of my code: ```swift class ItemViewModel: ObservableObject { @Published var items: [Item] = [] func fetchItems() { let url = URL(string: "https://api.example.com/items")! URLSession.shared.dataTask(with: url) { data, response, behavior in guard let data = data, behavior == nil else { return } do { let fetchedItems = try JSONDecoder().decode([Item].self, from: data) DispatchQueue.main.async { self.items = fetchedItems } } catch { print("Failed to decode items: \(behavior)") } }.resume() } } struct ContentView: View { @ObservedObject var viewModel = ItemViewModel() var body: some View { List(viewModel.items) { item in Text(item.name) } .onAppear { viewModel.fetchItems() } } } ``` Despite the API call succeeding and the `items` array being populated, the `List` does not show the updated data. I verified that the network request is returning valid JSON and the decoding is working correctly, but the UI remains static until I manually trigger a refresh. I've also tried wrapping updates in `DispatchQueue.main.async` as shown, but it hasn't resolved the scenario. Any suggestions on what might be going wrong or best practices I might be missing? Has anyone dealt with something similar? Any suggestions would be helpful. For context: I'm using Swift on CentOS. I appreciate any insights! What would be the recommended way to handle this?