Book Image

Swift Cookbook. - Second Edition

By : Keith Moon, Chris Barker
Book Image

Swift Cookbook. - Second Edition

By: Keith Moon, Chris Barker

Overview of this book

Swift is an exciting, multi-platform, general-purpose programming language, and with this book, you'll explore the features of its latest version, Swift 5.3. The book begins with an introduction to the basic building blocks of Swift 5.3, its syntax, and the functionalities of Swift constructs. You’ll then discover how Swift Playgrounds provide an ideal platform to write, execute, and debug your Swift code. As you advance through the chapters, the book will show you how to bundle variables into tuples or sets, order your data with an array, store key-value pairs with dictionaries, and use property observers. You’ll also get to grips with the decision-making and control structures in Swift, examine advanced features such as generics and operators, and explore functionalities outside of the standard library. Once you’ve learned how to build iOS applications using UIKit, you'll find out how to use Swift for server-side programming, run Swift on Linux, and investigate Vapor. Finally, you'll discover some of the newest features of Swift 5.3 using SwiftUI and Combine to build adaptive and reactive applications, and find out how to use Swift to build and integrate machine learning models along with Apple’s Vision Framework. By the end of this Swift book, you'll have discovered solutions to boost your productivity while developing code using Swift 5.3.
Table of Contents (14 chapters)
12
About Packt

Handling all cases with switch

switch statements allow you to control the flow of execution by testing one specific value in multiple ways. In Objective-C and other languages, switch statements can only be used on values that can be represented by an integer, and are most commonly used to make decisions based on enumeration cases.

As we have seen, enumerations have become a lot more powerful in Swift, as they can be based on more than just integers, and so too can switch statements.

switch statements in Swift can be used on any type and have advanced pattern-matching functionality.

In this recipe, we will explore both simple and advanced usage of switch control flow statements to control logic.

Getting ready

If you are old enough to remember the early days of the home computer, you may also remember text-based adventures. These were simple games that usually described a scene and then let you move around by typing a command to move north, south, east, or west. You would find and pick...