SwiftUI UIHostingController example for Lessons in SwiftUI blog post

swiftui-uihostingcontroller-example.swift

import SwiftUI
import UIKit

class MyViewController: UIViewController {
    
    // this is how you embed a SwiftUI View
    lazy var host: UIViewController = {
        return UIHostingController(rootView: MySwiftUIView())
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupView()
    }
    
    private func setupView() {
        addChild(host)
        view.addSubview(host.view)
        host.didMove(toParent: self)
        host.view.frame = view.frame
    }
}