Book Image

Mastering Swift 5 - Fifth Edition

By : Jon Hoffman
Book Image

Mastering Swift 5 - Fifth Edition

By: Jon Hoffman

Overview of this book

Over the years, the Mastering Swift book has established itself amongst developers as a popular choice as an in-depth and practical guide to the Swift programming language. The latest edition is fully updated and revised to cover the new version: Swift 5. Inside this book, you'll find the key features of Swift 5 easily explained with complete sets of examples. From the basics of the language to popular features such as concurrency, generics, and memory management, this definitive guide will help you develop your expertise and mastery of the Swift language. Mastering Swift 5, Fifth Edition will give you an in-depth knowledge of some of the most sophisticated elements in Swift development, including protocol extensions, error handling, and closures. It will guide you on how to use and apply them in your own projects. Later, you'll see how to leverage the power of protocol-oriented programming to write flexible and easier-to-manage code. You will also see how to add the copy-on-write feature to your custom value types and how to avoid memory management issues caused by strong reference cycles.
Table of Contents (20 chapters)

Requirements

When we develop applications, we usually have a set of requirements that we need to develop toward. With that in mind, let's define the requirements for the animal types that we will be creating in this chapter:

  • We will have three categories of animals: sea, land, and air.
  • Animals may be members of multiple categories. For example, an alligator can be a member of both the land and sea categories.
  • Animals may attack and/or move when they are on a tile that matches the categories they are in.
  • Animals will start off with a certain number of hit points, and if those hit points reach 0 or less, then they will be considered dead.

For our example here, we will define two animals, the Lion and Alligator, but we know that the number of animal types will grow as we develop the game.

We will start off by looking at how we would design our animal types using an object...