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SwiftUI Cookbook

SwiftUI Cookbook

By : Giordano Scalzo, Nzokwe
4.8 (10)
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SwiftUI Cookbook

SwiftUI Cookbook

4.8 (10)
By: Giordano Scalzo, Nzokwe

Overview of this book

SwiftUI is an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, right from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based book, you’ll work with SwiftUI and explore a range of essential techniques and concepts that will help you through the development process. The recipes cover the foundations of SwiftUI as well as the new SwiftUI 2.0 features introduced in iOS 14. Other recipes will help you to make some of the new SwiftUI 2.0 components backward-compatible with iOS 13, such as the Map View or the Sign in with Apple View. The cookbook begins by explaining how to use basic SwiftUI components. Then, you’ll learn the core concepts of UI development such as Views, Controls, Lists, and ScrollViews using practical implementation in Swift. By learning drawings, built-in shapes, and adding animations and transitions, you’ll discover how to add useful features to the SwiftUI. When you’re ready, you’ll understand how to integrate SwiftUI with exciting new components in the Apple development ecosystem, such as Combine for managing events and Core Data for managing app data. Finally, you’ll write iOS, macOS, and watchOS apps while sharing the same SwiftUI codebase. By the end of this SwiftUI book, you'll have discovered a range of simple, direct solutions to common problems found in building SwiftUI apps.
Table of Contents (15 chapters)
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Creating floating hearts in SwiftUI

When Periscope was introduced in 2015, it was the first app to popularize the live-streaming feature that is now part of other apps, such as Facebook, Instagram, and YouTube.

A way of appreciating the streamer was to send a bunch of floating hearts, a feature that is also now implemented on Instagram and Facebook.

In this recipe, we'll see how to implement this feature in SwiftUI, as an example of a fairly complex real-world animation that can still be done easily in SwiftUI.

Getting ready

Let's start by creating a SwiftUI app called FloatingHeartsApp.

For this recipe, we are going to use a third-party framework that provides a function to create an interpolation when given a small set of points.

The library is called SwiftCubicSpline and can be found at https://github.com/gscalzo/SwiftCubicSpline:

  1. From the menu, select Files | Swift Packages | Add Package Dependency...:

    Figure 7.20 – The Add Package Dependency...

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