ContentView.swift

//
//  ContentView.swift
//  MoviesApp
//
//  Created by Mohammad Azam on 6/9/21.
//

import SwiftUI

struct ContentView: View {
    
    @StateObject private var movieListVM = MovieListViewModel()
    
    var body: some View {
        VStack {
            Text("Hello, world!")
                .padding()
                .task {
                    await movieListVM.fetchAllMovies()
            }
            Button("Load Data") {
                let handler = async {
                    await movieListVM.fetchAllMovies()
                }
                
            }
        }
    }
}

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

Movie.swift

//
//  Movie.swift
//  MoviesApp
//
//  Created by Mohammad Azam on 6/9/21.
//

import Foundation

struct MovieResponse: Decodable {
    let movies: [Movie]
    
    private enum CodingKeys: String, CodingKey {
        case movies = "Search"
    }
}

struct Movie: Decodable {
    let title: String
    let imdbId: String
    let poster: String
    
    private enum CodingKeys: String, CodingKey {
        case title = "Title"
        case imdbId = "imdbID"
        case poster = "Poster"
    }
}

MovieListViewModel.swift

//
//  MovieListViewModel.swift
//  MoviesApp
//
//  Created by Mohammad Azam on 6/9/21.
//

import Foundation

class MovieListViewModel: ObservableObject {
    
    func fetchAllMovies() async {
        do {
            let _ = try await Webservice().getMovies()
            
            // map the movies to MovieViewModel
            
            // assign the [MovieViewModel] to a @Published property
        } catch {
            print(error)
        }
        
    }
    
}

Webservice.swift

//
//  Webservice.swift
//  MoviesApp
//
//  Created by Mohammad Azam on 6/9/21.
//

import Foundation

enum NetworkError: Error {
    case badURL
    case decodingError
    case noData
}

class Webservice {
    
    func getMovies() async throws -> [Movie] {
        
        guard let url = URL(string: "http://www.omdbapi.com/?s=Batman&page=2&apikey=YOURAPIKEY") else {
            throw NetworkError.badURL
        }
        
        let (data, _) = try await URLSession.shared.data(from: url)
        let movieResponse = try? JSONDecoder().decode(MovieResponse.self, from: data)
        return movieResponse?.movies ?? []
    }
    
    /*
    func getMovies(completion: @escaping (Result<[Movie], NetworkError>) -> Void) {
        
        guard let url = URL(string: "http://www.omdbapi.com/?s=Batman&page=2&apikey=564727fa") else {
            completion(.failure(.badURL))
            return
        }
        
        URLSession.shared.dataTask(with: url) { (data, _, error) in
            
            guard let data = data, error == nil else {
                completion(.failure(.noData))
                return
            }
            
            let movieResponse = try? JSONDecoder().decode(MovieResponse.self, from: data)
            completion(.success(movieResponse?.movies ?? []))
            
        }.resume()
            
    } */
    
}