SwiftUI How to create a gradient text

swiftui_gradient_text1.swift

import SwiftUI

extension Color {
    static func hexStringToColor (hex:String, opacity: Double = 1.0) -> Color {
        var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
        if (cString.hasPrefix("#")) {
            cString.remove(at: cString.startIndex)
        }
        if ((cString.count) != 6) {
            return Color.gray
        }
        var rgbValue:UInt64 = 0
        Scanner(string: cString).scanHexInt64(&rgbValue)
        return Color(
            red: Double((rgbValue & 0xFF0000) >> 16) / 255.0,
            green: Double((rgbValue & 0x00FF00) >> 8) / 255.0,
            blue: Double(rgbValue & 0x0000FF) / 255.0,
            opacity: Double(opacity)
        )
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            GradientText(title: "Good Morning")
                .padding()
        }
    }
}

struct GradientText: View {
    let title: String
    let colors = Gradient(colors: [Color.hexStringToColor(hex: "#FF0000"),
                                   Color.hexStringToColor(hex: "#40B482")])
    
    var body: some View {
        RadialGradient(gradient: colors,
                       center: .center,
                       startRadius: 0,
                       endRadius: 300)
            .frame(height: 65)
            .mask(Text("Good Morning")
                .font(.system(size: 50))
        )
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}