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 25 

  1. What are the downsides of running certain code on the main thread?

a) It can block the UI.

  1. In which circumstances will threading not help your performance?

a) When you have a lengthy layout-related calculation.

  1. Which GCD feature can you use to execute an action when several other actions are done executing?

b) DispatchGroup.

  1. Which of the following is not a benefit of operations?

b) Faster code execution.

  1. What's the maximum number of Operations you can run at the same time?

a) There is no hard limit, iOS decides on the fly.

  1. What is KVO?

a) A way for objects to observe properties of another object.

  1. How do you start executing operations on an operation queue?

c) By adding operations to it.