Progress Bars in iOS 18 - #30DaysOfSwift

#beginners #tutorial #swift #swiftui

Day 19: Tell Your Users About The Progress ⏳

Welcome to Day 19 of the #30DaysOfSwift series!

Learn today about how to implement progress bar in your SwiftUI app.

Why Use Progress Indicators?

User Feedback: They inform users that a task is in progress, improving the overall user experience.
Task Transparency: Users can gauge how long they might need to wait, which can reduce frustration.
Modern UI: Adding progress indicators enhances the aesthetics and functionality of your app.

Example Use Case: Implementing a Progress Bar

In this example, we’ll create a simple progress bar that updates as a task progresses.

import SwiftUI

struct ContentView: View {
    @State private var progress = 0.0 // State variable to track progress

    var body: some View {
        VStack {
            ProgressView("Loading...", value: progress, total: 100) // Progress bar
                .progressViewStyle(LinearProgressViewStyle()) // Style of the progress bar
                .padding()

            Button("Start Loading") {
                startLoading() // Start the loading process
            }
            .padding()
        }
        .padding()
    }

    func startLoading() {
        progress = 0.0 // Reset progress
        for i in 1...100 {
            DispatchQueue.main.asyncAfter(deadline: .now() + Double(i) * 0.1) {
                progress = Double(i) // Update progress
            }
        }
    }
}

@main
struct ProgressIndicatorApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView() // Main content view
        }
    }
}