Apple Sample Code Architecture
Collection

Accessibility sample architecture

Source-backed, high-level architecture notes for Apple sample-code pages grouped in the Accessibility folder.

  • Catalog module label: Accessibility
  • Coverage: 8 / 8 sample pages documented
  • Source policy: archive hashes and extracted-tree references are verified locally before analysis

Samples

Sample Platforms High-level architecture Documented patterns
Accessibility design for Mac Catalyst iOS, iPadOS, Mac Catalyst Small UIKit MVC app with value-type view models and controller-owned screen state. View model, Delegate, Diffable data source, Coordinator-by-controller
Delivering an exceptional accessibility experience iOS, iPadOS, Mac Catalyst One UIKit view controller coordinates a small model and several specialized views. Coordinator-by-controller, Framework delegate, Custom accessibility element, Cached derived view, State propagation
Enhancing the accessibility of your SwiftUI app iOS, iPadOS, Mac Catalyst, macOS SwiftData-backed SwiftUI app plus a WidgetKit extension sharing model types and App Intents. SwiftUI composition, Shared model container, Router, App Intent bridge, Multi-target
Integrating accessibility into your app macOS A split-view shell dynamically loads many independent example controllers from storyboards. Example catalog, Split-view coordinator, Delegate, Framework protocol adapter
WWDC21 Challenge: Large Text Challenge iOS, iPadOS, Mac Catalyst A code-light, single-target SwiftUI challenge organized around JSON scenarios and per-exercise observable state objects. SwiftUI composition, Observable view model, Strategy protocol, Data-driven exercises
WWDC21 Challenge: Speech Synthesizer Simulator iOS, iPadOS, Mac Catalyst One UIKit controller owns the scene and a Conversation speech coordinator; notifications carry current speaker/line changes back to the UI. View model, Framework delegate, Observer, Parser
WWDC21 Challenge: VoiceOver Maze iOS, iPadOS, Mac Catalyst An instruction controller presents a maze controller; the maze derives stage text and decisions from lookup tables. State machine, Custom accessibility element, Command closure, Coordinator-by-controller
WWDC22 Challenge: Learn Switch Control through gaming iOS, iPadOS, Mac Catalyst A code-light SwiftUI app where GameBoardView owns an observable Game; Game mutates value-type Deck and Card models. MVVM, Observable object, Value model, Accessibility action

Cross-sample signals

Recurring documented patterns

Pattern label Sample documents
Coordinator-by-controller 3
View model 2
Delegate 2
Framework delegate 2
Custom accessibility element 2
SwiftUI composition 2

Type-role naming evidence

Counts below are declaration-name suffixes, not inferred patterns.

Role suffix Distinct declarations across samples
View 51
Controller 33
Delegate 11
App 3
ViewModel 1
Player 1
Provider 1
Scene 1

Swift access-control evidence

These are declaration occurrences in scanned Swift source, including implicit internal declarations.

Access level Occurrences
implicit internal 1930
private 163
fileprivate 109
public 5
private(set) 2

References

Generated from the verified local catalog and completed Markdown documents.