FontStyleSampleView.swift

import SwiftUI

struct FontStyleSampleView: View {
    private var fontStyles = FontStyle.allCases

    var body: some View {
        List(fontStyles, id: \.self) { style in
            Text(style.rawValue)
                .fontStyle(style)
                .foregroundColor(.black)
            Text(displayString(from: style))
                .font(.system(size: style.estimatedDefaultPointSize))
                .fontWeight(style.weight)
                .foregroundColor(.gray)
        }
    }

    private func displayString(from style: FontStyle) -> String {
        "\(style.rawValue), estimated: \(style.estimatedDefaultPointSize) pt"
    }
}

struct FontStyleSampleView_Previews: PreviewProvider {
    static var previews: some View {
        FontStyleSampleView()
    }
}