SwiftUI: Difficulty Updating an ObservableObject from a ViewModel with Combine
I've encountered a strange issue with I'm testing a new approach and I tried several approaches but none seem to work. I'm experiencing an issue where my `ObservableObject` properties are not updating as expected when I modify them from the ViewModel in a SwiftUI application. I have a ViewModel that manages some state for a form, and I'm using Combine to handle the updates. Despite using `@Published` for my properties, the UI does not seem to reflect the changes when I'm trying to update them based on user input. Here's a simplified version of my ViewModel: ```swift import Combine import SwiftUI class FormViewModel: ObservableObject { @Published var name: String = "" @Published var age: String = "" func updateName(newName: String) { self.name = newName } func updateAge(newAge: String) { self.age = newAge } } ``` In my SwiftUI view, I'm binding to these properties like so: ```swift struct ContentView: View { @StateObject private var viewModel = FormViewModel() var body: some View { VStack { TextField("Name", text: $viewModel.name) .padding() .onChange(of: viewModel.name) { newValue in viewModel.updateName(newName: newValue) } TextField("Age", text: $viewModel.age) .padding() .onChange(of: viewModel.age) { newValue in viewModel.updateAge(newAge: newValue) } } } } ``` However, when I type into the text fields, I notice that the `onChange` closures are being called, but for some reason, the UI does not update immediately as I would expect. Instead, the changes appear to be delayed or sometimes not reflected at all. I've tried moving the `updateName` and `updateAge` calls directly into the `TextField` without the `onChange` modifier, and I've also ensured that the `ContentView` is being presented correctly. Here’s the relevant error message I occasionally see in the console: ``` UI API called on a background thread: <TextField: 0x...> ``` I've verified that I'm not running UI updates off the main thread, so I'm puzzled about what's causing this behavior. Is there something I'm missing about how `@Published` properties work with SwiftUI and Combine? Any insights would be appreciated! What's the best practice here? I'm working in a Windows 10 environment. Any ideas how to fix this? Cheers for any assistance!