SwiftUIでAPI呼び出しでJSONをパースするサンプルコード

ContentView.swift

import SwiftUI
import Combine

struct Movie: Codable, Identifiable {
    public var id: Int
    public var name: String
    public var released: String
    
    enum CodingKeys: String, CodingKey {
        case id = "id"
        case name = "title"
        case released = "year"
    }
}

public class MovieFetcher: ObservableObject {
    @Published var movies = [Movie]()
    
    init() {
        load()
    }
    
    func load() {
        guard let url = URL(string: "https://gist.githubusercontent.com/rbreve/60eb5f6fe49d5f019d0c39d71cb8388d/raw/f6bc27e3e637257e2f75c278520709dd20b1e089/movies.json") else { return }
        URLSession.shared.dataTask(with: url) { (data, response, error) in
            DispatchQueue.main.async {
                self.movies = try! JSONDecoder().decode([Movie].self, from: data!)
            }
        }.resume()
    }
}

struct ContentView: View {
    @ObservedObject var fetcher = MovieFetcher()
    
    var body: some View {
        VStack {
            List(fetcher.movies) { movie in
                VStack (alignment: .leading) {
                    Text(movie.name)
                    Text(movie.released)
                        .font(.system(size: 11))
                        .foregroundColor(Color.gray)
                }
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}