Book Image

Mastering Swift 5.3 - Sixth Edition

By : Jon Hoffman
Book Image

Mastering Swift 5.3 - Sixth Edition

By: Jon Hoffman

Overview of this book

Over the years, Mastering Swift has proven itself among developers as a popular choice for an in-depth and practical guide to the Swift programming language. This sixth edition comes with the latest features, an overall revision to align with Swift 5.3, and two new chapters on building swift from source and advanced operators. From the basics of the language to popular features such as concurrency, generics, and memory management, this in-depth guide will help you develop your expertise and mastery of the language. As you progress, you will gain practical insights into some of the most sophisticated elements in Swift development, including protocol extensions, error handling, and closures. The book will also show you how to use and apply them in your own projects. In later chapters, you will understand how to use the power of protocol-oriented programming to write flexible and easier-to-manage code in Swift. Finally, you will learn how to add the copy-on-write feature to your custom value types, along with understanding how to avoid memory management issues caused by strong reference cycles. By the end of this Swift book, you will have mastered the Swift 5.3 language and developed the skills you need to effectively use its features to build robust applications.
Table of Contents (23 chapters)
21
Other Books You May Enjoy
22
Index

Properties

Properties associate values with a class or a structure. There are two types of properties:

  • Stored properties: These will store variable or constant values as part of an instance of a class or structure. Stored properties can also have property observers that can monitor the property for changes and respond with custom actions when the value of the property changes.
  • Computed properties: These do not store a value themselves but instead retrieve and possibly set other properties. The value returned by a computed property can also be calculated when it is requested.

Stored properties

A stored property is a variable or constant that is stored as part of an instance of a class or structure. These are defined with the var and let keywords, just like normal variables and constants. In the following code, we will create a structure named MyStruct and a class named MyClass. The structure and the class both contain two stored properties, c and v. The...