Mastering Swift 3

Book Image

Mastering Swift 3

Book Image

Mastering Swift 3

Overview of this book

Swift is the definitive language of Apple development today. It’s a vital part of any iOS and OS X developer’s skillset, helping them to build the most impressive and popular apps on the App Store—the sort of apps that are essential to iPhone and iPad users every day. With version 3.0, the Swift team have added new features to improve the development experience—making it easier to get the results you want and customers expect. Inside, you’ll find the key features of Swift 3.0 and quickly learn how to use the newest updates to your development advantage. From Objective-C interoperability to ARC, to closures and concurrency, this advanced Swift guide will develop your expertise and make you more fluent in this vital programming language. We give you in-depth knowledge of some of the most sophisticated elements of Swift development including protocol extensions, error-handling, design patterns, and concurrency, and guide you on how to use and apply them in your own projects. You'll see how even the most challenging design patterns and programming techniques can be used to write cleaner code and to build more performant iOS and OS X applications. By the end of this book, you’ll have a handle on effective design patterns and techniques, which means you’ll soon be writing better iOS and OS X applications with a new level of sophistication and control.

Mastering Swift 3

Mastering Swift 3

Credits

About the Author

About the Author

About the Reviewer

About the Reviewer

www.PacktPub.com

www.PacktPub.com

Preface

Free Chapter

Taking the First Steps with Swift

Taking the First Steps with Swift

Learning About Variables, Constants, Strings, and Operators

Learning About Variables, Constants, Strings, and Operators

Constants and variables

Using Swift Collections and the Tuple Type

Using Swift Collections and the Tuple Type

Swift collection types

Control Flow and Functions

Control Flow and Functions

What we have learned so far

Putting it all together

Classes and Structures

Classes and Structures

What are classes and structures?

Creating a class or structure

Custom initializers

Overriding methods and properties

Protocol syntax

Memory management

Using Protocols and Protocol Extensions

Using Protocols and Protocol Extensions

Protocols as types

Polymorphism with protocols

Type casting with protocols

Protocol extensions

Protocol-Oriented Design

Protocol-Oriented Design

Object-Oriented design

Writing Safer Code with Availability and Error Handling

Writing Safer Code with Availability and Error Handling

Error handling prior to Swift 2.0

Native error handling

The availability attribute

Custom Subscripting

Custom Subscripting

Introducing subscripts

Subscripts with Swift arrays

Read and write custom subscripts

Read-only custom subscripts

Calculated subscripts

Subscript values

External names for subscripts

Multidimensional subscripts

When not to use a custom subscript

Using Optional Types

Using Optional Types

Introducing optionals

The need for optional types in Swift

Optional chaining

Working with Generics

Working with Generics

An introduction to generics

Generic functions

Associated types

When not to use generics

Working with Closures

Working with Closures

An introduction to closures

Simple closures

Shorthand syntax for closures

Using closures with Swift's array algorithms

Standalone closures and good style guidelines

Changing functionality

Selecting a closure based on results

Creating strong reference cycles with closures

Using Mix and Match

Using Mix and Match

What is mix and match?

When to use mix and match

Using Swift and Objective-C together in the same project

Concurrency and Parallelism in Swift

Concurrency and Parallelism in Swift

Concurrency and parallelism

Swift Formatting and Style Guide

Swift Formatting and Style Guide

What is a programming style guide?

Your style guide

Swifts Core Libraries

Swifts Core Libraries

Apple's URL loading system

Adopting Design Patterns in Swift

Adopting Design Patterns in Swift

What are design patterns?

Creational patterns

Structural design patterns

Behavioral design patterns

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About the Author

Jon Hoffman has over 20 years of experience in the field of Information Technology. Over those 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 developed extensively for the iOS platform since 2008. This includes several apps that he has published in the App Store, apps that he has written for third parties, and numerous enterprise applications. What really drives Jon is the challenges the Information Technology field provides and there is nothing more exhilarating to him than overcoming a challenge.

You can follow Jon on his two blogs: http://masteringswift.blogspot.com and http://myroboticadventure.blogspot.com.

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.

I would like to thank my wonderful wife Kim, without whose support, encouragement, patience, and understanding this book would have never been written. I would also like to thank my two wonderful daughters Kailey and Kara who have both been my inspiration and driving force since the days they were born.