如何调整我的视图模型以实现依赖注入swiftui (用于以后的单元测试)

protocol NetworkService {
    // 定义网络服务所需的方法和属性
}

class MyViewModel: ObservableObject {
    var networkService: NetworkService
    
    init(networkService: NetworkService) {
        self.networkService = networkService
    }
    
    // 视图模型的其他代码
}

struct MyView: View {
    @StateObject var viewModel: MyViewModel
    
    var body: some View {
        // 使用viewModel中的属性和方法
    }
}

let networkService = MyNetworkService() // 实现了NetworkService协议的具体类
let viewModel = MyViewModel(networkService: networkService)
let contentView = MyView(viewModel: viewModel)