Using Live Preview with Xcode11 and UIKit

swift

#if DEBUG && canImport(SwiftUI)
import SwiftUI

extension SomeViewController: UIViewControllerRepresentable {
    typealias UIViewControllerType = SomeViewController

    func makeUIViewController(context: UIViewControllerRepresentableContext<UIViewControllerType>) -> UIViewControllerType {
        return SomeViewController()
    }

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

@available(iOS 13, *)
struct SomeViewController_Previews : PreviewProvider {
    static var previews: some View {
        SomeViewController()
    }
}
#endif