SwiftUI: Dynamic List Items Disappearing When Using Custom View Models
Hey everyone, I'm running into an issue that's driving me crazy. I've looked through the documentation and I'm still confused about I've looked through the documentation and I'm still confused about I'm experiencing an scenario with a SwiftUI `List` where dynamically added items are disappearing when I update the underlying data model. I'm using a custom view model that conforms to `ObservableObject`, and I believe the question lies in how I'm handling state updates. Here's a simplified version of my view model: ```swift class Item: Identifiable, ObservableObject { var id = UUID() @Published var name: String init(name: String) { self.name = name } } class ItemListViewModel: ObservableObject { @Published var items: [Item] = [] func addItem(name: String) { let newItem = Item(name: name) items.append(newItem) } } ``` In my SwiftUI view, I have the following code to display the list of items: ```swift struct ContentView: View { @ObservedObject var viewModel = ItemListViewModel() var body: some View { VStack { List(viewModel.items) { item in Text(item.name) } Button("Add Item") { viewModel.addItem(name: "Item \(viewModel.items.count + 1)") } } } } ``` When I tap the "Add Item" button, the items are added to the array, but occasionally, the `List` performs as expected, and other times, it shows empty rows or omits the newly added items entirely, especially after multiple additions. I've pinpointed that the scenario seems to arise when the list updates while the view is still rendering. I've tried wrapping the `items.append(newItem)` call in `DispatchQueue.main.async` but that didn't resolve the scenario. I also verified that the `Identifiable` conformance is correct and that `items` is being published. Could this be a question related to SwiftUI's inherent state handling, or am I missing something in my implementation? Any insights would be appreciated. This is part of a larger service I'm building. Any help would be greatly appreciated! How would you solve this? The stack includes Swift and several other technologies. I'd love to hear your thoughts on this. Any pointers in the right direction?