UIKit holding SwiftUI Holding UIKit

ViewController.swift

// (c) Confusion Studios LLC and affiliates. Confidential and proprietary.

import SwiftUI
import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        view.backgroundColor = .orange
        let swiftUIView = ContentView().asUIView

        swiftUIView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(swiftUIView)

        NSLayoutConstraint.activate([
            swiftUIView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            swiftUIView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            swiftUIView.topAnchor.constraint(equalTo: view.topAnchor),
            swiftUIView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            Text("Hello, world!").padding(.top, 10)
            UIViewWrapper(uiView: makeUIView(with: .blue))
            HStack {
                UIViewWrapper(uiView: makeUIView(with: .blue))
                UIViewWrapper(uiView: makeUIView(with: .cyan))
                UIViewWrapper(uiView: makeUIView(with: .orange))
            }
            UIViewWrapper(uiView: makeUIView(with: .green))
            HStack {
                UIViewWrapper(uiView: makeUIView(with: .blue))
                UIViewWrapper(uiView: makeUIView(with: .cyan))
                UIViewWrapper(uiView: makeUIView(with: .orange))
            }
            Text("Hello, world!").padding(.bottom, 10)
        }
    }

    func makeUIView(with color: UIColor) -> UIView {
        let view = UIView()
        view.backgroundColor = color
        return view
    }
}

struct UIViewWrapper: UIViewRepresentable {
    typealias UIViewType = UIView

    let uiView: UIView

    func makeUIView(context: Context) -> UIView {
        return uiView
    }

    func updateUIView(_ uiView: UIView, context: Context) {
        // Update your UIView if needed
    }
}

extension View {
    var asUIView: UIView {
        let hostingController = UIHostingController(rootView: self)
        return hostingController.view
    }
}