👀 Views: 21 💬 Answers: 1 📅 Created: 2025-06-05

swiftui uiscrollview ios16 autolayout swift

Quick question that's been bugging me - I'm facing a puzzling issue with a `UIScrollView` in my SwiftUI application targeting iOS 16. I have a vertical stack of images that I want to display, and I'm trying to dynamically set the content size based on the number of images. However, the scroll view does not seem to update its content size correctly when the images are loaded asynchronously. Instead of scrolling, it shows an empty space below the images. Here’s a simplified version of my implementation: ```swift struct ContentView: View { @State private var images: [UIImage] = [] var body: some View { ScrollView { VStack { ForEach(images, id: \.self) { image in Image(uiImage: image) .resizable() .scaledToFit() .frame(height: 200) } } } .onAppear { loadImages() } } private func loadImages() { let urls = ["url1", "url2", "url3"] for url in urls { // Simulating asynchronous image loading DispatchQueue.global().async { if let data = try? Data(contentsOf: URL(string: url)!), let image = UIImage(data: data) { DispatchQueue.main.async { self.images.append(image) } } } } } } ``` When I run this code, the scroll view initially appears empty, and only after some time does the content appear, but it doesn't allow scrolling – I just see a static view with a few images stacked on top of each other. I’ve checked the constraints and they seem fine. No error messages are displayed in the console, and I’ve confirmed that the images are being loaded correctly. I've also tried wrapping the `VStack` in a `GeometryReader`, but that didn’t seem to resolve the issue either. Is there something specific with `UIScrollView` in SwiftUI that I might be missing, or best practices to follow when using asynchronous loading with scroll views? Any guidance would be appreciated!