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 9. Fetching and Displaying Data from the Network

Most modern applications communicate with a web service. Some apps rely on them heavily, acting as a layer that merely reads data from the web and displays it in app form. Other apps use the web to retrieve and sync data to make it locally available, and others only use the web as backup storage. Of course, there are a lot more reasons to use data from the internet than the ones mentioned.

In this chapter, you will expand the MustC application, so it uses a web service to retrieve popularity ratings for the movies that family members have added as their favorites. These popularity ratings will be stored in the Core Data database and displayed together with the names of the movies.

In this chapter, you'll learn about the following topics:

  • URLSession
  • Working with JSON in Swift
  • Updating Core Data objects with fetched data