59 lines
1.5 KiB
Swift
59 lines
1.5 KiB
Swift
import SwiftUI
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import Combine
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// 1. Класс для загрузки изображения
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class ImageLoader: ObservableObject {
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@Published var image: UIImage?
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private var cancellable: AnyCancellable?
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private let url: URL
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init(url: URL) {
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self.url = url
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}
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deinit {
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cancellable?.cancel()
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}
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func load() {
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cancellable = URLSession.shared.dataTaskPublisher(for: url)
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.map { UIImage(data: $0.data) }
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.replaceError(with: nil)
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.receive(on: DispatchQueue.main)
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.assign(to: \.image, on: self)
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}
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func cancel() {
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cancellable?.cancel()
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}
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}
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// 2. View для отображения удаленного изображения
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struct RemoteImageView: View {
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@StateObject private var loader: ImageLoader
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private let placeholder: Image
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init(url: URL, placeholder: Image = Image("placeholderPhoto")) {
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_loader = StateObject(wrappedValue: ImageLoader(url: url))
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self.placeholder = placeholder
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}
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var body: some View {
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content
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.onAppear(perform: loader.load)
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.onDisappear(perform: loader.cancel)
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}
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private var content: some View {
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Group {
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if let image = loader.image {
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Image(uiImage: image)
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.resizable()
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} else {
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placeholder
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.resizable()
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}
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}
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}
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}
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