Book Image

Mastering iOS 14 Programming - Fourth Edition

By : Mario Eguiluz Alebicto, Chris Barker, Donny Wals
Book Image

Mastering iOS 14 Programming - Fourth Edition

By: Mario Eguiluz Alebicto, Chris Barker, Donny Wals

Overview of this book

Mastering iOS 14 development isn’t a straightforward task, but this book can help you do just that. With the help of Swift 5.3, you’ll not only learn how to program for iOS 14 but also be able to write efficient, readable, and maintainable Swift code that reflects industry best practices. This updated fourth edition of the iOS 14 book will help you to build apps and get to grips with real-world app development flow. You’ll find detailed background information and practical examples that will help you get hands-on with using iOS 14's new features. The book also contains examples that highlight the language changes in Swift 5.3. As you advance through the chapters, you'll see how to apply Dark Mode to your app, understand lists and tables, and use animations effectively. You’ll then create your code using generics, protocols, and extensions and focus on using Core Data, before progressing to perform network calls and update your storage and UI with the help of sample projects. Toward the end, you'll make your apps smarter using machine learning, streamline the flow of your code with the Combine framework, and amaze users by using Vision framework and ARKit 4.0 features. By the end of this iOS development book, you’ll be able to build apps that harness advanced techniques and make the best use of iOS 14’s features.
Table of Contents (22 chapters)

Chapter 13: Working with the Combine Framework

With the launch of Combine, Apple provided developers with a new way of handling events in their code; a functional and declarative approach, where developers can implement streams and publisher/subscriber paradigms easily, without the need for external libraries. Centralizing event processing in your apps with the help of Combine makes your code easier to understand than using other traditional methods like nested closures or callbacks all around your code.

In this chapter, you will learn about the following topics:

  • Understanding the Combine framework: We will review the basic components of the framework with code samples – publishers, subscribers, subjects, and operators.
  • Combining publishers, subscribers, and operators: We will build a small feature in an example app mixing all these concepts together.
  • Using operators to build error-proof streams: We will use flatMap and catch to create streams that can deal...