HostingCell.swift

//
//  HostingCell.swift
//  theathletic-ios
//
//  Created by .
//  Copyright © 2021 The Athletic. All rights reserved.
//

import SwiftUI
import UIKit

class HostingCell<Content: View>: UICollectionViewCell {

    private let hostingController = UIHostingController<Content?>(rootView: nil)

    deinit {
        removeHostingControllerFromParent()
    }

    private func removeHostingControllerFromParent() {
        hostingController.willMove(toParent: nil)
        hostingController.view.removeFromSuperview()
        hostingController.removeFromParent()
    }

    func configure(with view: Content, in parent: UIViewController?) {
        guard let parent = parent else {
            let message = "parent viewController is required"
            assertionFailure(message)
            ATHLogger(category: .application).warning(message)
            return
        }

        hostingController.rootView = view
        hostingController.view.invalidateIntrinsicContentSize()

        let requiresControllerMove = hostingController.parent != parent
        if requiresControllerMove {
            removeHostingControllerFromParent()
            parent.addChild(hostingController)
        }

        if !contentView.subviews.contains(hostingController.view) {
            setUpUI()
        }

        if requiresControllerMove {
            hostingController.didMove(toParent: parent)
        }
    }

    private func setUpUI() {
        hostingController.view.translatesAutoresizingMaskIntoConstraints = false
        contentView.addSubview(hostingController.view)
        hostingController.view.backgroundColor = .clear

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

usage.swift

collection.register(HostingCell<MySwiftUICell>.self)
struct MySwiftUICell: View {
  var body: some View.....
}
....

            let cell =
                collection.dequeueReusableCell(for: indexPath)
                as HostingCell<MySwiftUICell>
            cell.configure(
                with: MySwiftUICell(
                    viewModel: myViewModel
                ),
                in: parent
            )