Strange Memory Leak in SwiftUI with Combine - State implementation guide Correctly
I'm trying to debug I'm migrating some code and Quick question that's been bugging me - I'm working with a perplexing scenario with a SwiftUI app using Combine. When I trigger a network call to fetch user data, the app sometimes exhibits a memory leak that causes the view not to update correctly. I suspect it might be related to how I'm using `@ObservedObject` along with `@Published` properties. Here's a simplified version of my model and view: ```swift class UserViewModel: ObservableObject { @Published var user: User? func fetchUser() { let url = URL(string: "https://api.example.com/user")! URLSession.shared.dataTask(with: url) { [weak self] data, response, behavior in guard let data = data, behavior == nil else { return } DispatchQueue.main.async { self?.user = try? JSONDecoder().decode(User.self, from: data) } }.resume() } } ``` And in my SwiftUI view: ```swift struct UserView: View { @ObservedObject var viewModel = UserViewModel() var body: some View { VStack { if let user = viewModel.user { Text(user.name) } else { Text("Loading...") } } .onAppear { viewModel.fetchUser() } } } ``` I've ensured that the `fetchUser()` method is called only once when the view appears. However, when I navigate back and forth between views, the user data is not updating correctly, and Instruments shows a memory leak related to the `UserViewModel` instance. Furthermore, I receive the following warning intermittently in the console: ``` 2023-10-15 12:34:56.789 MyApp[1234:56789] Warning: Attempt to present <UserView: ...> on <OtherView: ...> whose view is not in the window hierarchy! ``` I've tried using `@StateObject` instead of `@ObservedObject`, but that doesn't seem to resolve the scenario either. Any insights into what might be causing this behavior or how to effectively manage the memory in this scenario would be greatly appreciated. How would you solve this? I'm working on a web app that needs to handle this. Thanks in advance! For context: I'm using Swift on Linux. Thanks for taking the time to read this! My team is using Swift for this desktop app. How would you solve this?