UIView preview snippet

UIView+Preview.swift

#if DEBUG

import UIKit
import SwiftUI

// MARK: - Preview Struct

@available(iOS 13, *)
extension UIView {
    private struct Preview<V: UIView>: UIViewRepresentable {

        // MARK: - Properties

        let view: V

        // MARK: - Methods

        func makeUIView(context: UIViewRepresentableContext<Preview<V>>) -> V {
            return view
        }

        func updateUIView(_ uiView: V, context: UIViewRepresentableContext<Preview<V>>) { }
    }
}

// MARK: - Preview Property

@available(iOS 13, *)
extension UIView {
    var preview: some View {
        Preview(view: self)
    }
}

#endif

UsageExample.swift

#if DEBUG

import SwiftUI

@available(iOS 13, *)
struct Preview: PreviewProvider {
    static var previews: some View {
        return UIView().preview
            .edgesIgnoringSafeArea(.all)
            .previewLayout(.fixed(width: 320, height: 400))
    }
}

#endif