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)

Creating a Core Data model

So far, you have worked on the persistence layer of your app. The next step is to create your models so that you can actually store and retrieve data from your Core Data database. All models in an application that uses Core Data are represented by NSManagedObject subclasses. When you retrieve data from your database, NSManagedObjectContext is responsible for creating instances of your managed objects and populating them with the relevant fetched data.

The MustC application requires two models: a family-member model and a movie model. When you define models, you can also define relationships. For the models in MustC, you should define a relationship that links multiple movies to a single family member.

Creating the models

In order for Core Data to understand which models your application uses, you must define them in Xcode's model editor. Let's create a new model file so that you can add your own models to the MustC application. Create a...