Incorporating ClassKit into an Educational App

At a glance

Project structure

Source bundle/
├── GreatPlays/
│   ├── AppDelegate.swift
│   ├── Controller/
│   │   ├── ActsTableViewController.swift
│   │   ├── PlaysTableViewController.swift
│   │   ├── QuizViewController.swift
│   │   ├── SceneViewController.swift
│   │   └── ScenesTableViewController.swift
│   ├── Model/
│   │   ├── Scene.swift
│   │   ├── Act.swift
│   │   ├── Play.swift
│   │   └── PlayLibrary.swift
│   └── ClassKit/
│       └── Node.swift
└── ClassKitContextProvider/
    └── ContextRequestHandler.swift

Structure observations

• Architecturally prominent files are ranked from entry points and role-named declarations; resource-only paths are omitted.
• Primary languages: Swift.
• The verified tree contains 9 project/configuration file(s) and 14 source declaration(s).

Overall architecture

flowchart LR
    N1["AppDelegate"]
    N2["ActsTableViewController"]
    N3["ContextRequestHandler"]
    N4["ClassKit APIs"]
    N1 --> N2
    N2 --> N3
    N3 --> N4

Reference code

GreatPlays/AppDelegate.swift:12 — architecture anchor

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    // ...
}

Interpretation

The arrows summarize the source-visible entry, role-named types or folders, and framework direction; when nodes come from structural folders, the sequence is a high-level interpretation rather than proof that every adjacent node calls the next. Ownership is claimed only where the next section cites a stored property or assignment. The diagram is intentionally limited to the dominant path into ClassKit.

Ownership and state

classDiagram
    AppDelegate o-- UIWindow : window
    SceneViewController o-- UITextView : sceneText
    Scene o-- Act : act
    Scene *-- Int : number

Ownership evidence

GreatPlays/AppDelegate.swift:15 — stored dependency or nearest verified ownership anchor

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    // ...
    var window: UIWindow?
    // ...
}

Composition arrows indicate a source-visible construction expression or locally owned value state; aggregation means the owner stores or receives a dependency without proving exclusive lifetime ownership.

Class and protocol design

GreatPlays/ClassKit/Node.swift:13 — representative type boundary

protocol Node {
    var parent: Node? { get }
    var children: [Node]? { get }
    var identifier: String { get }
    var contextType: CLSContextType { get }
}

The source explicitly defines local protocol relationships: Act → Node, Play → Node, Quiz → Node, Scene → Node.

Access control

Reference code

GreatPlays/AppDelegate.swift:86 — representative boundary

    private func navigate(to play: Play) {
        // ...
    }

Swift declarations without a modifier are internal; explicit private, fileprivate, private(set), public, or open entries above are interpreted by language semantics. Objective-C/C samples instead rely on header and implementation boundaries, which are not equivalent to Swift lexical privacy.

Logic ownership and placement

Design patterns

Naming conventions

• Types: Controller: ActsTableViewController, PlaysTableViewController, QuizViewController, SceneViewController, ScenesTableViewController; Delegate: AppDelegate; Handler: ContextRequestHandler; Scene: Scene.
• Protocols: Node.
• Methods: application, navigate, splitViewController, beginRequest, updateDescendants, numberOfSections, tableView, prepare.
• Files: GreatPlays/AppDelegate.swift, ClassKitContextProvider/ContextRequestHandler.swift, GreatPlays/Controller/ActsTableViewController.swift, GreatPlays/Controller/PlaysTableViewController.swift, GreatPlays/Controller/QuizViewController.swift, GreatPlays/Controller/SceneViewController.swift.

Architecture takeaways

• AppDelegate is the main source-visible entry or composition anchor for this sample.
• Framework work reaches ClassKit, UIKit through a deliberately small high-level chain; the detailed API graph remains inside the cited implementation files.
• Stored-property evidence identifies lifecycle collaboration; it does not by itself prove exclusive object ownership.
• Access-control conclusions separate verified language visibility from the likely design rationale.
• Local protocol relationships provide an explicit substitution boundary.

Source map

• Official Apple documentation