Google Swift Style Guide

Official Google Swift coding standards for consistent, maintainable iOS/macOS code.

Golden Rules

1. Clear, descriptive names — readability at the call site
2. Prefer let over var — immutability by default
3. Use optionals properly — avoid force unwrapping (!)
4. Protocol-oriented programming — prefer protocols over inheritance
5. guard for early returns — reduce nesting with early exits
6. Use type inference — let Swift infer types when obvious
7. SwiftLint for consistency — automate style enforcement

Quick Reference

Naming Conventions