HelloWorldView.swift

import UIKit
import SwiftUI // <-- Add SwiftUI import

class HelloWorldView: UIView {

    // UIView code here
    
    struct HelloWorldView_Preview: PreviewProvider { // <-- Add the preview definition
        static var previews: some View {
            Preview()
        }

        private struct Preview: UIViewRepresentable {
            func makeUIView(context: Context) -> UIView {
                HelloWorldView()
            }

            func updateUIView(_ uiView: UIViewType, context: Context) {
                // Not needed
            }
        }
    }
}