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)

Exploring UICollectionView further

In this section, we'll again touch on some extra little bits that, just like with our table views, will allow us to really harness the power of a collection view – specifically when it comes to calculating the size of your layout. We'll start by taking a look at some overrides that we can make use of to achieve this.

Implementing a custom UICollectionViewLayout

Implementing a large and complex feature such as a custom collection view layout might seem like a huge challenge for most people.

Creating your layout involves calculating the position for every cell that your collection view will display. You must ensure that these calculations are performed as quickly and as efficiently as possible because your layout calculations directly influence the performance of your collection view. A poor layout implementation will lead to slow scrolling and a lousy user experience eventually.

Luckily, the documentation that has been...