Handling Image Download and Caching in SwiftUI with Combine - Unexpected Memory Issues
After trying multiple solutions online, I still can't figure this out. I'm stuck trying to I'm currently working on a SwiftUI application where I need to download and display images from a remote URL... I've implemented a simple image downloading function using Combine. However, I'm working with unexpected memory usage spikes that lead to the app being terminated on low-memory devices. I suspect the caching mechanism might not be properly configured. Here's the code I'm using: ```swift import SwiftUI import Combine class ImageLoader: ObservableObject { @Published var image: UIImage? private var cancellable: AnyCancellable? func load(from url: URL) { cancellable = URLSession.shared.dataTaskPublisher(for: url) .map { $0.data } .map(UIImage.init) .replaceError(with: nil) .receive(on: DispatchQueue.main) .assign(to: \.$image, on: self) } } struct AsyncImageView: View { @ObservedObject var imageLoader: ImageLoader var body: some View { Image(uiImage: imageLoader.image ?? UIImage()) .resizable() .aspectRatio(contentMode: .fit) .onAppear { imageLoader.load(from: imageURL) } } } ``` I have made sure to use the `@Published` property wrapper to notify the view of changes. However, I noticed that when rapidly scrolling through a list of images, memory usage increases significantly, and eventually, I get the behavior message: `Terminated due to memory scenario`. I also tried using a caching mechanism with NSCache but haven't properly integrated it yet. I'm unsure how to effectively cache the images without causing memory bloat. Can anyone suggest best practices for handling image downloads and caching in SwiftUI while avoiding these memory issues? I'm currently testing on iOS 16.0 and using Combine for reactive programming. Any insights or improvements would be greatly appreciated! For reference, this is a production mobile app.