Sample CodemacOSReviewed 2026-07-21View on Apple Developer

Classifying images for categorization and search

At a glance

Item Summary
Purpose Analyze and label images using a Vision classification request.
App architecture A Swift sample with the source-visible chain ClassifyingImagesMainViewVision APIs.
Main patterns No named application pattern supported by the extracted structure
Project style 4 scanned source file(s) across Swift, organized around ranked entry, type, and file boundaries.

Project structure

Source bundle/
├── ClassifyingImages/
│   ├── ClassifyingImages.swift
│   ├── DataSource.swift
│   ├── MainView.swift
│   ├── ResultsView.swift
│   └── ClassifyingImages.entitlements
├── ClassifyingImages.xcodeproj/
│   ├── .xcodesamplecode.plist
│   └── project.pbxproj
└── Configuration/
    └── SampleCode.xcconfig

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 4 project/configuration file(s) and 4 source declaration(s).

Overall architecture

Reference code

ClassifyingImages/ClassifyingImages.swift:10 — architecture anchor

@main
struct ClassifyingImagesApp: App {
    var body: some Scene {
        WindowGroup {
            MainView()
        }
    }
}

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 Vision.

Ownership and state

Ownership evidence

ClassifyingImages/DataSource.swift:12 — stored dependency or nearest verified ownership anchor

struct ImageFile {
    // ...
    let url: URL
    // ...
}
Owner Object or state Relationship Mutation authority
ImageFile URL (url) owns value state Initialized by the owner; the binding is immutable
ImageFile String (name) owns value state Initialized by the owner; the binding is immutable
ImageFile Dictionary (observations) owns value state App/module collaborators
MainView Array (imageURLS) owns wrapper-managed state Owning lexical scope

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

ClassifyingImages/ClassifyingImages.swift:11 — representative type boundary

struct ClassifyingImagesApp: App {
    var body: some Scene {
        WindowGroup {
            MainView()
        }
    }
}
Type Responsibility Depends on or conforms to
ClassifyingImagesApp Application entry and top-level composition App
MainView User-interface presentation and input forwarding View
ResultsView User-interface presentation and input forwarding View
ImageFile Represents a feature value or composable behavior Concrete collaborators/imported frameworks

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

Access control

Symbol Access Verified effect Likely rationale
imageURLS (ClassifyingImages/MainView.swift:12) private Use is restricted to the lexical declaration and same-file extensions allowed by Swift. Inference: keep state mutation or dependency lifetime inside the owning implementation.
images (ClassifyingImages/MainView.swift:13) private Use is restricted to the lexical declaration and same-file extensions allowed by Swift. Inference: keep state mutation or dependency lifetime inside the owning implementation.
searchTerm (ClassifyingImages/MainView.swift:14) private Use is restricted to the lexical declaration and same-file extensions allowed by Swift. Inference: keep state mutation or dependency lifetime inside the owning implementation.
showFilePicker (ClassifyingImages/MainView.swift:15) private Use is restricted to the lexical declaration and same-file extensions allowed by Swift. Inference: keep state mutation or dependency lifetime inside the owning implementation.

Reference code

ClassifyingImages/MainView.swift:12 — representative boundary

    @State private var imageURLS: [URL] = []

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

Logic Owning type or file Placement rationale
Application entry and top-level composition ClassifyingImagesApp The source’s App suffix makes this role explicit.
User-interface presentation and input forwarding MainView, ResultsView The source’s View suffix makes this role explicit.

Design patterns

Pattern Source evidence Purpose or tradeoff
No named application pattern ClassifyingImages/ClassifyingImages.swift:10 The verified source directly composes concrete framework types; this document avoids forcing a pattern name.

Naming conventions

  • Types: App: ClassifyingImagesApp; View: MainView, ResultsView.
  • Protocols: no local protocol declaration in the scanned source.
  • Methods: classifyImage, classifyAllImages, selectImages.
  • Files: ClassifyingImages/MainView.swift, ClassifyingImages/ResultsView.swift.

Architecture takeaways

  • ClassifyingImages is the main source-visible entry or composition anchor for this sample.
  • Framework work reaches SwiftUI, Vision 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

Source file Relevant symbols
ClassifyingImages/ClassifyingImages.swift ClassifyingImagesApp
ClassifyingImages/DataSource.swift ImageFile
ClassifyingImages/MainView.swift MainView
ClassifyingImages/ResultsView.swift ResultsView