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
Dedication
Packt Upsell
Contributors
Preface
Index

Storing and retrieving data with CloudKit


CloudKit is meant to be used as a backend for your app that syncs across devices and provides a seamless experience for users. This section will go over the principles that you should keep in mind when implementing CloudKit in your app. By the end of this section, you will know precisely how storing, retrieving, and updating data in CloudKit works. You will then go on to implement CloudKit in the MustC app by combining it with the existing Core Data database.

Communicating with CloudKit for the first time

When your app launches for the very first time, it should immediately make itself known to CloudKit so it can subscribe to changes. Technically you don't have to do this because you can implement your own logic to retrieve data from CloudKit as you need it. However, an efficient CloudKit implementation will work flawlessly when there is no internet connection, which means that it's probably a good idea to store all data locally by writing it to a...