Ios SwiftUI 视图 viewDidLoad()

试图在视图加载之后加载图像，驱动视图的模型对象(参见下面的MovieDetail)有一个urlString.因为SwiftUIView元素没有生命周期方法(并且没有视图控制器驱动)，所以处理这个问题的最佳方式是什么？

我遇到的主要问题是，无论我try 使用哪种方法来解决问题(绑定对象或使用状态变量)，我的视图在加载之后才会有urlString.

// movie object
struct Movie: Decodable, Identifiable {

    let id: String
    let title: String
    let year: String
    let type: String
    var posterUrl: String

    private enum CodingKeys: String, CodingKey {
        case id = "imdbID"
        case title = "Title"
        case year = "Year"
        case type = "Type"
        case posterUrl = "Poster"
    }
}

// root content list view that navigates to the detail view
struct ContentView : View {

    var movies: [Movie]

    var body: some View {
        NavigationView {
            List(movies) { movie in
                NavigationButton(destination: MovieDetail(movie: movie)) {
                    MovieRow(movie: movie)
                }
            }
            .navigationBarTitle(Text("Star Wars Movies"))
        }
    }
}

// detail view that needs to make the asynchronous call
struct MovieDetail : View {

    let movie: Movie
    @State var imageObject = BoundImageObject()

    var body: some View {
        HStack(alignment: .top) {
            VStack {
                Image(uiImage: imageObject.image)
                    .scaledToFit()

                Text(movie.title)
                    .font(.subheadline)
            }
        }
    }
}

提前谢谢您.