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Mastering iOS 12 Programming - Third Edition

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Mastering iOS 12 Programming - Third Edition

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

Understanding differences in types

Being aware of the available types in Swift, knowing their similarities, and, more importantly, their differences will help you make better decisions about the way you write your code. The preceding segments have listed several properties of value types and references types. More specifically, you learned a lot about classes, structs, and enums. Closures are also a reference type because they get passed around by their location in memory rather than their value, but there isn't much else to say about them in this context.

The most obvious comparison you can make is probably between structs and classes. They look very similar, but they have very different characteristics, as you have already seen. Enums are a special type altogether, they represent a value from a fixed number of possible values but are very similar to structs otherwise.

The most import difference you need to understand is the general difference between value types and reference types, and...

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