Swift Style

Overview

Available References

Naming & Conventions

• Variables and Constants -

  var

  vs

  let

  , naming conventions, immutability
• Functions - Function naming, parameter labels, return types

Types & Protocols

• Types - Struct vs Class vs Enum, value vs reference semantics
• Protocols - Protocol-Oriented Programming (POP), composition, extensions

Code Organization

• Access Control -

  public

  ,

  private

  ,

  internal

  ,

  fileprivate

  ,

  open

Quick Reference

Naming Conventions

String

UIViewController

userID

fetchData()

is

has

should

isEmpty

hasPermission

maxConnections

Type Selection Guide

Need identity or reference semantics?
├── YES → Use Class
└── NO → Need inheritance?
    ├── YES → Use Class
    └── NO → Modeling finite states?
        ├── YES → Use Enum
        └── NO → Use Struct (default)

Access Levels

private

fileprivate

internal

public

open

Best Practices

1. Default to structs - Use simplest type that expresses intent
2. Use

   let

   by default - Only use

   var

   when mutation needed
3. Prefer protocols over inheritance - More flexible composition
4. Keep functions focused - Single responsibility
5. Use access control - Expose only what's necessary
6. Follow naming conventions - Descriptive, Swifty names

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