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

  1. Which statement about reference types is false?

b) Reference types can always be subclassed.

  1. Which statement about value types is true?

c) Values types can conform to multiple protocols.

  1. What does heap allocation mean?

b) An object allocated on the heap is stored with a variable size in RAM memory.

  1. You should always use a struct for your data models. True or false?

b) False, it depends on whether your models have an identity.

  1. What keyword should you add to a function that mutates a property on a struct?

b) mutating.

  1. Which type of object is not allocated on the heap?

c) An enum.

  1. Which statement about the stack is true?

a) The stack has a fixed size.

  1. In which of the following cases would a reference type be a good choice?

a) When you want to create a new button in your app.

  1. In which of the following cases would a value type be a good choice?

b) When writing a networking object.