Agent skill

iOS Localization & Assets

Standards for String Catalogs, L10n, and Asset Management.

View SKILL.md on GitHub Repository
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Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/localization

Metadata

Additional technical details for this skill

labels
ios localization l10n assets xcassets
triggers 
{
    "files": [
        "**/*.stringcatalog",
        "**/*.xcassets",
        "**/*.strings"
    ],
    "keywords": [
        "LocalizedStringResource",
        "NSLocalizedString",
        "String(localized:)"
    ]
}

SKILL.md

iOS Localization & Assets Standards

Priority: P1

Implementation Guidelines

Localization (L10n)

  • String Catalogs (.stringcatalog): Use for primary localization in Xcode 15+. It provides a visual editor and compile-time checks for missing translations.
  • Native Implementation: Use String(localized: "key") or LocalizedStringResource. Avoid manual NSLocalizedString where possible.
  • Pluralization: Use String Catalogs' built-in pluralization support instead of complex code logic.
  • Formatting: Use Formatted API for dates, numbers, and currencies to respect the user's locale.

Asset Management

  • Asset Catalogs (.xcassets): Keep assets organized. Use folders with "Provides Namespace" enabled for large projects.
  • SF Symbols: Use for standard icons to ensure consistency and accessibility.
  • Vector Assets: Use PDF or SVG and enable "Preserve Vector Data" for resolution independence.

Best Practices

  • Hardcoded Strings: Never use hardcoded strings in UI. Every user-facing string must be localized.
  • Base Bundle: Ensure Base localization is complete before adding other languages.

Anti-Patterns

  • Manual String Formatting: **No manual currency symbol concat**: Use NumberFormatter or .formatted(.currency).
  • Loose Asset Files: **No loose png/jpg files in repo**: Always use Asset Catalogs.
  • Untranslated Keys: **No placeholder strings**: Ensure 100% coverage in String Catalogs.

References

  • L10n & Asset Organization

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