RepresentableViewController

gistfile1.txt

import SwiftUI

struct ContentView: View {
    var body: some View {
        RepresentableViewController(view: HelloWorldColorView())
    }
}

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

struct HelloWorldColorView: View {
    var body: some View {
        ZStack {
            Text("Hello, World!")
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Color.green)
        .edgesIgnoringSafeArea(.all)
    }
}

struct RepresentableViewController: UIViewControllerRepresentable {

    @State var view: HelloWorldColorView

    @State private var viewController = UIViewController()

    func makeUIViewController(context: UIViewControllerRepresentableContext<RepresentableViewController>) -> UIViewController {
        DispatchQueue.main.async {
            let view = UIHostingController(rootView: self.view).view ?? UIView()
            view.frame = UIScreen.main.bounds
            self.viewController.view.addSubview(view)
        }
        return viewController
    }

    func makeCoordinator() -> Coordintor { return Coordintor(owner: self) }

    func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<RepresentableViewController>) {}

    final class Coordintor: NSObject, UIDocumentInteractionControllerDelegate {
        let owner: RepresentableViewController
        init(owner: RepresentableViewController) {
            self.owner = owner
        }
        func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
            return owner.viewController
        }

        func documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) {
            controller.delegate = nil
        }
    }
}