axiom-tvos
tvOS Development
Overview
tvOS shares UIKit and SwiftUI with iOS but diverges in critical ways that catch every iOS developer. The three most dangerous assumptions: (1) local files persist, (2) WebView exists, (3) focus works like @FocusState.
Core principle tvOS is not "iOS on TV." It has a dual focus system, no persistent local storage, no WebView, and a remote with two incompatible generations. Treat it as its own platform.
tvOS 26 Adopts Liquid Glass design language with new app icon system. See axiom-liquid-glass for implementation patterns.
tvOS Porting Triage
Before shipping a tvOS port, verify these five areas — they account for 90% of tvOS-specific bugs:
| Area | Check | Section |
|---|---|---|
| Storage | No persistent local files — iCloud required | §3 |
| Focus | Dual system working, focus guides for gaps | §1 |
| WebView | Replaced with JavaScriptCore or native rendering | §4 |
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