👀 Views: 0 💬 Answers: 1 📅 Created: 2025-07-08

ios combine swiftui uiview swift

After trying multiple solutions online, I still can't figure this out. I'm working on a project and hit a roadblock. I'm having trouble updating a `UIImageView` with a new image when using Combine in my iOS 17 application. My setup involves a `ViewModel` that fetches an image asynchronously and publishes it to the view. However, the `UIImageView` does not seem to update even though the publisher emits a new value. Here's the relevant code snippet: ```swift import UIKit import Combine class ImageViewModel: ObservableObject { @Published var image: UIImage? = nil func fetchImage() { // Simulating a network call to fetch an image let url = URL(string: "https://example.com/image.png")! URLSession.shared.dataTask(with: url) { data, response, error in guard let data = data, error == nil else { return } DispatchQueue.main.async { self.image = UIImage(data: data) } }.resume() } } class MyViewController: UIViewController { var viewModel = ImageViewModel() var cancellables = Set<AnyCancellable>() let imageView = UIImageView() override func viewDidLoad() { super.viewDidLoad() setupBindings() viewModel.fetchImage() } private func setupBindings() { viewModel.$image .receive(on: RunLoop.main) .sink { [weak self] newImage in self?.imageView.image = newImage } .store(in: &cancellables) } } ``` I have verified that the `fetchImage` method is being called and that the image is being fetched correctly, but for some reason, the `imageView` does not show the new image. I also checked the constraints and layout, and they seem fine. I even added a print statement to see if the `newImage` is being updated in the `sink`, which it is. However, the `UIImageView` remains blank. Is there something I'm missing with the Combine setup? Any insights would be appreciated! I'm working on a CLI tool that needs to handle this. Is there a better approach?