Swift UI in Compose Multiplatform

iOSApp.swift

@main
struct iOSApp: App {
    init() {
        FactoryCompanion().shared = TheFactory()
    }

    var body: some Scene {
		WindowGroup {
			ContentView()
		}
	}
}

iosMain.kt

interface Factory {
    companion object {
        var shared: Factory? = null
    }

    fun makeController(): UIViewController
}

@OptIn(ExperimentalForeignApi::class)
@Composable
fun MyView(modifier: Modifier = Modifier) {
    UIKitViewController(
        modifier = modifier,
        factory = { Factory.shared!!.makeController() },
    )
}

SwiftUIComponent.swift

class TheFactory: Factory {
    func makeController() -> UIViewController {
        MySwiftUIViewController()
    }
}

// Create your SwiftUI view
struct MySwiftUIView: View {
    var body: some View {
        Text("Hello, SwiftUI!")
    }
}

// Subclass UIHostingController to create a custom SwiftUI view controller
class MySwiftUIViewController: UIHostingController<MySwiftUIView> {
    // Optionally, you can add custom initialization or configuration here
    
    // Example of custom initialization
    init() {
        super.init(rootView: MySwiftUIView())
        setup()
    }
    
    // Example of custom configuration
    func setup() {
        // Add any custom setup code here
    }
    
    // Required initializer when subclassing UIHostingController
    @objc required dynamic init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder, rootView: MySwiftUIView())
        setup()
    }
}