Swift 4 Protocol-Oriented Programming

By : Jon Hoffman

4.1 (29)

Buy this Book

Swift 4 Protocol-Oriented Programming

4.1 (29)

By: Jon Hoffman

Buy this Book

Overview of this book

Swift has become the number one language used in iOS and macOS development. The Swift standard library is developed using protocol-oriented programming techniques, generics, and first-class value semantics; therefore, every Swift developer should understand these powerful concepts and how to take advantage of them in their application design. This book will help you understand the differences between object-oriented programming and protocol-oriented programming. It will demonstrate how to work with protocol-oriented programming using real-world use cases. You will gain a solid knowledge of the various types that can be used in Swift and the differences between value and reference types. You will be taught how protocol-oriented programming techniques can be used to develop very flexible and easy-to-maintain code. By the end of the book, you will have a thorough understanding of protocol-oriented programming and how to utilize it to build powerful and practical applications.

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

Starting with the Protocol

Protocol syntax

Protocol inheritance

Protocol composition

Using protocols as a type

Polymorphism with protocols

Type casting with protocols

Associated types with protocols

Delegation

Designing with protocols

Protocols in the Swift standard library

Summary

Our Type Choices

Classes

Structures

Access controls

Enumerations

Tuples

Protocols

Value and reference types

Recursive data types for reference types only

Inheritance for reference types only

Dynamic dispatch

Swift's built-in types

Copy-on-write

Summary

Extensions

Defining an extension

Protocol extensions

Text validation

Extensions with the Swift standard library

Conforming to the Equatable protocol

Summary

Generics

Generic functions

Type constraints with Generics

Generic types

Associated types

Generic subscripts

Copy-on-write

Generics in a protocol-oriented design

Generics in the Swift standard library

Summary

Object-Oriented Programming

What is object-oriented programming?

Requirements for the sample code

Swift as an object-oriented programming language

Issues with the object-oriented design

Summary

Protocol-Oriented Programming

Requirements for the sample code

Swift as a protocol-oriented programming language

Summarizing protocol-oriented programming and object-oriented programming

Differences between object-oriented programming and protocol-oriented programming

The winner is...

Summary

Adopting Design Patterns in Swift

What are design patterns?

Creational patterns

Structural design patterns

Behavioral design patterns

Summary

Case Studies

Logging service

Data access layer

Summary

Customer Reviews

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Protocol-Oriented Programming

This book is about protocol-oriented programming. When Apple announced Swift 2 at the World Wide Developers Conference (WWDC) in 2015, they also declared that Swift was the world's first protocol-oriented programming language. From its name, we may assume that protocol-oriented programming is all about the protocol; however, this would be a wrong assumption. Protocol-oriented programming is about so much more than just the protocol; it is actually a new way of not only writing applications, but also how we think about programming.

In this chapter, you will learn: