Creating a tvOS media catalog app in SwiftUI

At a glance

Project structure

Source bundle/
└── TVCatalog/
    ├── TVCatalogApp.swift
    ├── SidebarContentView.swift
    ├── ButtonsView.swift
    ├── SectionsView.swift
    ├── StackView.swift
    ├── CardContentView.swift
    ├── ContentView.swift
    ├── DescriptionView.swift
    ├── HeroBackgroundView.swift
    ├── HeroHeaderView.swift
    ├── SearchView.swift
    └── Artwork/
        └── Asset.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 3 project/configuration file(s) and 23 source declaration(s).

Overall architecture

flowchart LR
    N1["TVCatalogApp"]
    N2["ContentView"]
    N3["SwiftUI APIs"]
    N1 --> N2
    N2 --> N3

Reference code

TVCatalog/TVCatalogApp.swift:10 — architecture anchor

@main
struct TVCatalogApp: App {
    // ...
}

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 SwiftUI.

Ownership and state

classDiagram
    SidebarContentView *-- MyMoviesTab : selection
    StackView *-- CGFloat : showcaseHeight
    FoldSnappingScrollTargetBehavior *-- Bool : aboveFold
    FoldSnappingScrollTargetBehavior *-- CGFloat : showcaseHeight

Ownership evidence

TVCatalog/SidebarContentView.swift:112 — stored dependency or nearest verified ownership anchor

struct SidebarContentView: View {
    @State var selection: MyMoviesTab = .upNext
    // ...
}

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

TVCatalog/TVCatalogApp.swift:11 — representative type boundary

struct TVCatalogApp: App {
    // ...
}

No local protocol conformance is claimed as protocol-oriented design; external framework conformances are listed only as dependencies.

Access control

Reference code

TVCatalog/StackView.swift:29 — representative boundary

struct StackView: View {
    @State private var belowFold = false
    // ...
}

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: App: TVCatalogApp; View: ButtonsView, CardContentView, ContentView, DescriptionView, HeroBackgroundView.
• Protocols: no local protocol declaration in the scanned source.
• Methods: detail, makeBody, updateTarget.
• Files: TVCatalog/TVCatalogApp.swift, TVCatalog/SidebarContentView.swift, TVCatalog/ButtonsView.swift, TVCatalog/SectionsView.swift, TVCatalog/StackView.swift, TVCatalog/CardContentView.swift.

Architecture takeaways

• TVCatalogApp is the main source-visible entry or composition anchor for this sample.
• Framework work reaches SwiftUI 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.
• The source does not justify labeling the design protocol-oriented.

Source map

• Official Apple documentation