Book Image

Mastering iOS 12 Programming - Third Edition

By : Donny Wals
Book Image

Mastering iOS 12 Programming - Third Edition

By: Donny Wals

Overview of this book

The iOS development environment has significantly matured, and with Apple users spending more money in the App Store, there are plenty of development opportunities for professional iOS developers. However, the journey to mastering iOS development and the new features of iOS 12 is not straightforward. This book will help you make that transition smoothly and easily. With the help of Swift 4.2, you’ll not only learn how to program for iOS 12, but also how to write efficient, readable, and maintainable Swift code that maintains industry best practices. Mastering iOS 12 Programming will help you build real-world applications and reflect the real-world development flow. You will also find a mix of thorough background information and practical examples, teaching you how to start implementing your newly gained knowledge. By the end of this book, you will have got to grips with building iOS applications that harness advanced techniques and make best use of the latest and greatest features available in iOS 12.
Table of Contents (35 chapters)
Title Page
Copyright and Credits
Packt Upsell

Chapter 5. Understanding the Swift Type System

The previous section left you with a solid foundation you can use to build great, adaptive apps on. At this point, it is a good idea to take a step back and look at the code you have written to gain a deeper understanding of Swift and how it works under. This section focuses on teaching you more about Swift as a language, regardless of what you intend to build.

In this chapter, you will learn about Swift's fantastic type system. Swift's type system is one of its most powerful features because it allows developers to express complex and flexible principles safely and predictably. This chapter takes you through the following steps:

  • You will learn about the types that are available to you
  • You will learn about the differences between the types, including their pros and cons
  • You will learn how to make informed decisions about the types you use in your code to make sure your code is of great quality