App Development with Swift case studies
App Development with Swift · Put your knowledge to work in context.
App Development with Swift is an entry-level Apple programming credential delivered through Certiport, a Pearson VUE business. It is aimed at students and early-career developers who are learning to build iOS and iPadOS apps in Apple's Swift language, typically inside a classroom, career-technical, or workforce-readiness programme. Most candidates prepare through instructor-led coursework, Apple's own educational materials, and hands-on practice building small apps in Xcode. The skills assessed cluster into five broad areas: Swift language fundamentals such as types, constants, and variables; control flow, functions, and closures; data modelling with structures, classes, enumerations, and protocols; collections, optionals, and error handling; and user interfaces and app architecture, including views, state, and how an app's pieces fit together. The App Development with Swift case studies are 5 cases and about 3,186 words.
1The Clamp That Works on One Screen Only
Your team ships a dashboard with a filter panel reused on three screens. DashboardFilters is a struct with dateRange: DateRange (another struct), sources: [Source] , and includeArchived: Bool .
649 words, about 3 min2Retry Closures That Keep the Screen Alive
FeedViewController keeps var pendingRequests: [() - Void] so failed pages can be retried from a Retry button. Each failure appends { self.load(page: nextPage) } , where nextPage is a var property on the controller.
635 words, about 3 min3Diffable Data Source Identity in a Flash Sale
The Home screen drives a UICollectionViewDiffableDataSource<Section, HomeItem where HomeItem is an enum with associated values: banner(Banner) , product(Product) , ad(Ad) . Product has id: UUID , title , price , rating , and imageURL .
700 words, about 4 min4The Empty State That Lied
The Orders tab loads 12,000 orders from a paginated JSON API. OrderService.fetch is declared throws , but every call site uses try?
679 words, about 3 min5Session State That Outlives the Logout
A shopping app uses SessionManager.shared , which holds currentUser and var cart: Cart . CartViewController registers a NotificationCenter observer with addObserver(forName:object:queue:using:) , captures self strongly, and discards the returned token.
523 words, about 3 min