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Mastering iOS 12 Programming

Mastering iOS 12 Programming

By : Wals
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Mastering iOS 12 Programming

Mastering iOS 12 Programming

3 (2)
By: 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 (29 chapters)
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Wrapping the feature up


All of the code is in place, and you have a better understanding of multithreading and how callbacks can be used in a multithreaded environment. Yet, if you build and run your app and add a new movie, the rating won't be displayed yet.

The following are the three reasons why this is happening:

  • The table view cell that shows the movie isn't updated yet.
  • The network request doesn't succeed because of App Transport Security.
  • Updates to movie objects aren't observed yet.

Let's solve these issues in order, starting with the table view cell.

Adding the rating to the movie cell

Currently, the movie table view displays cells that have a title. UITableViewCell has a built-in option to display a title and a subtitle for a cell. Open Main.storyboard and select the prototype cell for the movies. In the Attributes Inspector field, change the cell's style from basic to subtitle. This will allow you to use detailTextLabel on the table view cell. This is where we'll display the movie rating...

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