Keith Moon - Swift Cookbook

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First published: September 2017
Second edition: February 2021

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Keith Moon is an award-winning iOS developer, author, and speaker based in London. He has worked with some of the biggest companies in the world to create engaging and personal mobile experiences. Keith has been developing in Swift since its release, working on projects that are both fully Swift and mixed Swift and Objective-C. Keith has been invited to speak about Swift development at conferences from Moscow to Minsk and London.

Chris Barker is an iOS developer and tech lead for fashion retailer N Brown (JD Williams, SimplyBe, Jacamo), where he heads up the iOS team. Chris started his career developing .NET applications for online retailer dabs.com (now BT Shop) before he made his move into mobile app development with digital agency Openshadow (now MyStudioFactory Paris). There, he worked on mobile apps for clients such as Louis Vuitton, L'Oral Paris, and the Paris Metro. Chris often attends and speaks at local iOS developer meetups and conferences such as NSManchester, Malaga Mobile, and CodeMobile.

Juan Catalan is a software developer with more than 10 years of experience, having started learning iOS almost since its beginnings. He has worked as a professional iOS developer in many industries, including industrial automation, transportation, document management, fleet tracking, real estate, and financial services. Juan has contributed to more than 30 published apps, some of which have millions of users. He has a passion for software architecture, always looking for ways to write better code and optimize mobile apps.

George MacKay-Shore is an experienced software engineer who has worked in almost every field of the computing industry. His expertise ranges from embedded systems to games; from the public sector to FinTech; and all that is in between. He has a wide range of experience with many programming languages including C/C++, Swift, Java, TypeScript, and Python to name a few, and always strives to learn the newest innovative technologies.

Since Apple announced the Swift programming language at WWDC 2014, it has gone on to become one of the fastest-growing programming languages. Swift is modern, open-source, and easy to use, and therefore its usefulness can extend beyond Apple's ecosystem, giving it the potential to be used across all platforms and for any scenario.

Swift 5.3 is the latest version of this exciting new programming language, giving you the tools to build performant and responsive apps with safe and clean code.

This book will guide you through Swift's features, building up your knowledge and toolset layer by layer, so you can use Swift to build the next great app or service.

You will be given useful, easy-to-follow recipes for using Swift to accomplish real-world tasks. Each recipe only uses concepts previously covered in the book so you will never feel lost.

Learn what makes Swift one of the fastest-growing and most exciting programming languages available today.

If you are looking for a book to help you learn about the diverse features offered by Swift 5, along with tips and tricks to efficiently code and build applications, then this book is for you. Knowledge of Swift or general programming concepts will be beneficial.

,Swift Building Blocks, introduces you to the basic building blocks of Swift 5, its syntax, and the functionalities of basic Swift constructs. Also, this chapter will introduce you to Apples Xcode IDE and Swift Playgrounds, which provides an ideal way to create, execute, debug, and understand the recipes contained in this book, thus setting you up to initiate the development process. In this chapter, you will learn how to write your first Swift program and understand the various basic elements of the Swift language.

,Mastering the Building Blocks, teaches you how to create more complex structures on the basis of the building blocks that you studied in the first chapter and the functionalities provided by the Swift standard library. You will get an understanding of how to bundle variables into tuples, order data with the help of an array, and store key-value pairs with dictionaries. You will also learn how to use the property observers and control the access to and visibility of your code. Then, you will learn how to extend the functionalities of your code using the extensions.

Data Wrangling with Swift Control Flow, will teach you that programming is all about making decisions, therefore in this chapter, we will explore how to make decisions on the basis of the information gained and how to alter the control flow of the code. You will learn how to conditionally execute your code with if/else statements. You will also learn how to control the flow of execution of your code with switch statements, and then loop this code by understanding how to use for and while loops. You will then understand how to handle Swift errors with try, throw, do , and catch statements. Also, we will cover how a defer statement can be useful to change state once a function's execution is complete or to clean up values that are no longer needed.