Examples

ScreenUtil Demo Apps

Two runnable iOS 17 demo apps — one pure SwiftUI, one pure UIKit — each a single polished GitHub profile page whose every dimension flows through ScreenUtil. Designed on the iPhone 12 baseline (390×844): on an iPhone 12 the UI renders 1:1, and on a larger device (e.g. iPhone 17 Pro Max) the same design scales up proportionally. Screenshot both to show the adaptation.

Run

cd Examples
brew install xcodegen          # one-time
xcodegen generate
open ScreenUtilExamples.xcodeproj

Pick a scheme and run:

• ScreenUtilSwiftUIDemo — pure SwiftUI (@Observable model, NavigationStack, @Environment(\.screenUtil)).
• ScreenUtilUIKitDemo — pure UIKit (UIScene, Auto Layout, stored-property subviews).

What it shows

Each app composes the same sections, all scaled from the design baseline:

Section	ScreenUtil APIs exercised
Header (banner, avatar, name, bio)	numeric .w .h .sp .r, CGSize.scaled, UIView.cornerRadius/borderWidth/size, UIFont.systemFont(…, scaled:)
Stats row (repos/followers/following)	BatchScaler.fontSizes, UIEdgeInsets.scaled
Highlights (horizontal strip)	FastScale (width/height/text/size/point/rect), withFastScale, BatchScaler.points/.rects
Tag chips	BatchScaler.widths/.radii, withBatchScaler
Device & Scaling card	getScreenMetrics, screenWidth/Height, scaleWidth/Height/Text, deviceType, safeArea*, statusBarHeight, scale/fastScale(for:scaleType:) (all ScaleType cases), UIFont.customFont, and a one-line "bulk self-test" covering BatchScaler.heights/.sizes/.scale, BatchScaler.edgeInsets (UIKit), CGRect.scaled/.responsive

Real data + offline-safe

The profile loads from the live GitHub public API (api.github.com/users/{login}) — real avatar, repo and follower counts. On any failure (offline / rate-limited) it falls back to a bundled sample-user.json, so the demo (and your screenshots) never show a spinner or empty state.

Verify the scaling

Open the Device & Scaling card and read scaleW · scaleH:

• iPhone 12 → 1.00 · 1.00 (renders exactly as designed)
• iPhone 17 Pro Max → ~1.13 · 1.13 (everything scaled up proportionally)

The generated ScreenUtilExamples.xcodeproj is not committed; regenerate it with xcodegen generate.