Networking, Data and Shipping Your App

Fetching data with URLSession

Modern Swift uses async/await for networking – clean, readable asynchronous code:

struct Post: Codable { let id: Int; let title: String }

func loadPosts() async throws -> [Post] {
    let url = URL(string: "https://example.com/posts.json")!
    let (data, _) = try await URLSession.shared.data(from: url)
    return try JSONDecoder().decode([Post].self, from: data)
}

Codable automatically maps JSON to your Swift structs – no manual parsing.

Storing data

• @AppStorage / UserDefaults – small settings and flags.
• SwiftData / Core Data – structured local databases.
• Files – documents and cached downloads.

Shipping to the App Store

1. Test on the Simulator and a real device.
2. Join the Apple Developer Program (paid) and create an App ID.
3. Archive the app in Xcode and upload to App Store Connect.
4. Fill in metadata and screenshots, then submit for App Review.

Key points

• Use async/await + URLSession for networking.
• Codable maps JSON to structs automatically.
• Persist with UserDefaults, SwiftData/Core Data, or files.
• Publishing means a paid membership, an archive upload and App Review.