Sample question

1. Write a JSON parser that can consume the Appstore Search API and render a list of searchable objects.
   • Each result must be rendered similar to the AppStore rows with pixel perfect precision.
   • Tapping on a row will take you to the details screen for each app.
   • Tapping on a screenshot will present a fullscreen modal
   • There needs to be a delay on search when user is typing

Bonus 1: Fetch reviews for each app

Bonus 2: Implement horizontal snapping on screenshots and reviews

Bonus 3: Show differences between completion handlers and async/await. How do you use Continuations?

Bonus 4: Can you implement Image caching to reduce cost of loading images?

Available APIs

Search:

https://itunes.apple.com/search?term=\(term)&entity=software

App Details:

https://itunes.apple.com/lookup?id=\(trackId)

Reviews:

https://itunes.apple.com/rss/customerreviews/page=1/id=\(trackId)/sortby=mostrecent/json?l=en&cc=us

Course Topics

• Rendering SwiftUI views with NavigationStack, ScrollView, Searchable, GeometryReader, AsyncImage, etc.
• Fetching JSON with Async/Await
• Decoding JSON with Codable Protocol
• ScrollView snapping with scrollTargetLayout and scrollTargetBehavior
• iOS 17 #Observable macro
• Transform old completion handlers into async await code with Continuations
• Image caching using NSCache and AsyncImage