Jon Hoffman has over 20 years of experience in the field of information tec hnology.

Over these 20 years, Jon has worked in the areas of system administration, network administration, network security, application development, and architecture.

Currently, Jon works as a senior software engineer for Syn-Tech Systems.

Jon has been developing extensively for the iOS platform since 2008. This includes several apps that he has published in the app store—apps that he wrote for third parties and numerous enterprise applications.

Packt Publishing published Jon's first book, iOS and OS X Network Programming, in January 2014.

What really drives Jon is the challenges in the Information Technology field and there is nothing more exhilarating to him than overcoming a challenge. Some of Jon's other interests are watching baseball (go Sox) and basketball (go Celtics). Jon also really enjoys tae kwon do where he and his oldest daughter Kailey earned their black belts together early in 2014. Kim (his wife) earned her black belt in December 2014 and his youngest daughter is currently working towards her black belt.

• Preface
• Chapter 1 : Object - Oriented and Protocol - Oriented Programming
  • Swift as an object - oriented programming language
  • Swift as a protocol - oriented programming language
  • Summarizing protocol - oriented programming and object-oriented programming
  • Object - oriented programming versus protocol - oriented programming
  • The winner is...
  • Summary
• Chapter 2 : Our Type Choices
  • The class
  • The structure
  • The enumerations
  • The tuple
  • Protocols
  • Value versus class types
  • Recursive data types (reference types only)
  • Inheritance (reference types only)
  • Swift built - in data types and data structures
  • Summary
• Chapter 3 : Catching Our Errors
  • Using the guard statement
  • Error handling
  • Error handling with return values
  • Error handling with NSError
  • Error handling with Swift 2
  • When to use error handling
  • Summary
• Chapter 4 : All about the Protocol
  • Protocol syntax
  • Protocol composition
  • Using protocols as a type
  • Polymorphism with protocols
  • Type casting with protocols
  • Associated types with protocols
  • Delegation
  • Designing and developing with protocols
  • Summary
Chapter 5 : Let's Extend Some Types
• Defining an extension
• Protocol extensions
• Text validation
• Summary
Chapter 6 : Adopting Design Patterns in Swift
• What are design patterns ?
• Creational patterns
• Structural design patterns
• Behavioral design patterns
• Summary
Chapter 7 : Case Studies
• Logging service
• Data access layer with SQLite.swift
• Calculator application
• Summary
Index