👀 Views: 48 💬 Answers: 1 📅 Created: 2025-06-01

ios swift uikit swiftui combine Swift

I'm having a hard time understanding I'm deploying to production and I'm prototyping a solution and I've searched everywhere and can't find a clear answer..... I'm working with an scenario where my `UITableViewCell` is not updating its layout correctly when the underlying data changes. I'm using a combination of UIKit and SwiftUI in my iOS 16 application, and my UITableView is being populated with a list of items represented by a `@Published` property in my ViewModel. Here's a simplified version of my ViewModel: ```swift import Combine class MyViewModel: ObservableObject { @Published var items: [String] = [] func addItem(_ item: String) { items.append(item) } } ``` My view controller looks like this: ```swift import UIKit import SwiftUI class MyViewController: UIViewController, UITableViewDataSource { var viewModel = MyViewModel() let tableView = UITableView() override func viewDidLoad() { super.viewDidLoad() setupTableView() bindViewModel() } private func setupTableView() { tableView.dataSource = self view.addSubview(tableView) tableView.frame = view.bounds tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell") } private func bindViewModel() { viewModel.$items .receive(on: RunLoop.main) .sink { [weak self] _ in self?.tableView.reloadData() } .store(in: &cancellables) } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return viewModel.items.count } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) cell.textLabel?.text = viewModel.items[indexPath.row] return cell } } ``` The question arises when I call `viewModel.addItem("New Item")` from another part of my app. The `UITableView` does not reflect the new item immediately, and sometimes it shows stale data or becomes unresponsive. I've ensured that the data source is updated correctly, and I verified that `reloadData()` is indeed being called, but the UI still seems to not sync with the data. I've tried using `beginUpdates()` and `endUpdates()` around my `reloadData()` but it didn't make a difference. Additionally, I checked for any layout constraints that might be affecting the table view, but everything appears to be in order. Has anyone experienced similar issues with `UITableView` and `@Published` properties? What am I missing here? Any insights would be appreciated! For context: I'm using Swift on Ubuntu. This is happening in both development and production on Windows 10. What am I doing wrong? I'm on Windows 10 using the latest version of Swift. Thanks in advance! My team is using Swift for this microservice. Thanks for any help you can provide!