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swift-formatstyle

Format Swift values for display using FormatStyle and Foundation styles.

Updated Jun 5, 2026
Search Tags:#ui#formatting#localization#swift#date#number#formatstyle
One-click install
npx skills add https://github.com/harshav167/build-ios-apps --skill swift-formatstyle-harshav167
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-formatstyle
Source: https://github.com/harshav167/build-ios-apps/tree/main/skills/swift-formatstyle
Command: npx skills add https://github.com/harshav167/build-ios-apps --skill swift-formatstyle-harshav167

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Format values for human-readable display using the FormatStyle protocol and Foundation's concrete format styles. This avoids legacy Formatter subclasses and enables safe, composable, cacheable formatting across SwiftUI and UIKit.

Core Features & Use Cases

  • Numbers, currency, and percentages with locale-aware variations.
  • Dates, durations, measurements, and person names into clean UI representations.
  • Lists and URLs formatting with locale-sensitive separators.
  • SwiftUI Integration: use in Text(format:) and create reusable FormatStyle conformances.
  • Custom FormatStyle: design domain-specific styles and extend with ParseableFormatStyle parsing support.

Quick Start

Format a sample value using a FormatStyle to demonstrate locale-aware presentation, e.g., format 1234.56 as currency.

Frequently Asked Questions about swift-formatstyle

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I format Swift numbers, currencies, and dates for UI display?▼

Use the FormatStyle protocol and Foundation's concrete styles to format numbers, currencies, dates, and durations into clean, locale-aware human-readable UI representations without legacy Formatter subclasses.

Can I use FormatStyle with SwiftUI Text views?▼

Yes, FormatStyle integrates directly with SwiftUI through Text(format:) initializers, enabling you to apply locale-sensitive formatting to numbers, dates, and lists within your views.

Does FormatStyle support parsing strings back into values?▼

Yes, parsing is supported via ParseableFormatStyle, which allows you to reverse formatted strings back into their original Swift types while maintaining locale-aware formatting rules.

What is the best way to create custom formatting for domain-specific values in Swift?▼

Create custom FormatStyle conformances to design domain-specific styles, extending standard formatting logic for your unique data types with optional ParseableFormatStyle parsing support.

Do I need a specific iOS version to use FormatStyle in Swift?▼

Yes, FormatStyle requires iOS 15 or later, utilizing Foundation APIs to provide composable, cacheable formatting that avoids the overhead of legacy Formatter subclasses.

Can FormatStyle handle measurements and byte counts?▼

Yes, FormatStyle provides concrete styles for formatting measurements, person names, lists, byte counts, and URLs with locale-sensitive separators for clear UI presentation.

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