How to make a progress bar using swiftUI?

@State private var progress: Double = 0.0
let timer = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect()

var body: some View {
    ProgressView(value: progress, total: 100,
        label: {
            Text("Downloading...")
                .padding(.bottom, 4)
        }, currentValueLabel: {
            Text("\(Int(progress))%")
                .padding(.top, 4)
        }
    ).progressViewStyle(.linear)
    .onReceive(timer) { _ in
        if progress < 100 {
            progress += 1
        } else {
            progress = 0
        }
    }   
}

And right not the style is not right, consider change the code to this :

//
//  ContentView.swift
//  ProgressIconandBar
//
//  Created by WilliamJiamin on 2024/6/29.
//

import SwiftUI

struct ContentView: View {
    @State private var progress: Double = 0.0
    let timer = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect()

    var body: some View {
        VStack {
            Spacer()

            // Circular Progress View
            ProgressView("Downloading...", value: progress, total: 100)
                .progressViewStyle(CircularProgressViewStyle(tint: .blue))
//                .scaleEffect(2)

            Spacer()

            // Linear Progress View
            ProgressView(value: progress, total: 100) {
                Text("Downloading...")
                    .padding(.bottom, 4)
                    .frame(maxWidth: .infinity, alignment: .center)
            } currentValueLabel: {
                Text("\(Int(progress))%")
                    .padding(.top, 4)
                    .frame(maxWidth: .infinity, alignment: .center)
            }
            .progressViewStyle(.linear)
            .padding(10)
            .frame(maxWidth: .infinity, alignment: .center)

            Spacer()
        }
        .onReceive(timer) { _ in
            if progress < 100 {
                progress += 1
            } else {
                progress = 0
            }
        }
    }
}

#Preview {
    ContentView()
}