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final class Loader: BindableObject { | |
let didChange = PassthroughSubject<Data?, Never>() | |
var task: URLSessionDataTask! | |
var data: Data? = nil { | |
didSet { | |
didChange.send(data) | |
} | |
} | |
init(_ url: URL) { | |
task = URLSession.shared.dataTask(with: url, completionHandler: { data, _, _ in | |
DispatchQueue.main.async { | |
self.data = data | |
} | |
}) | |
task.resume() | |
} | |
deinit { | |
task.cancel() | |
} | |
} | |
let placeholder = UIImage(named: "placeholder.jpg")! | |
struct MyView: View { | |
init(url: URL) { | |
self.imageLoader = Loader(url) | |
} | |
@ObjectBinding private var imageLoader: Loader | |
var image: UIImage? { | |
imageLoader.data.flatMap(UIImage.init) | |
} | |
var body: some View { | |
Image(uiImage: image ?? placeholder) | |
} | |
} |
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