Keith Moon - Swift Cookbook: Over 60 proven recipes for developing better iOS applications with Swift 5.3, 2nd Edition

I would like to thank my amazing and supportive wife, Alissa. Without her support and
patienc e, this book would not have been possible.

Keith Moon

For my partner, Mandy, who is the strongest and bravest woman I have ever met, and to our beautiful daughter, Madeleine thank you both for your love and support.
For Harry and Nathan.

Chris Barker

Preface

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.