Book Image

Animating SwiftUI Applications

By : Stephen DeStefano
Book Image

Animating SwiftUI Applications

By: Stephen DeStefano

Overview of this book

Swift and SwiftUI are the backbone of Apple application development, making them a crucial skill set to learn. Animating SwiftUI Applications focuses on the creation of stunning animations, making you proficient in this declarative language and employing a minimal code approach. In this book, you'll start by exploring the fundamentals of SwiftUI and animation, before jumping into various projects that will cement these skills in practice. You will explore some simple projects, like animating circles, creating color spectrums with hueRotation, animating individual parts of an image, as well as combining multiple views together to produce dynamic creations. The book will then transition into more advanced animation projects that employ the GeometryReader, which helps align your animations across different devices, as well as creating word and color games. Finally, you will learn how to integrate the SpriteKit framework into our SwiftUI code to create scenes with wind, fire, rain, and or snow scene, along with adding physics, gravity, collisions, and particle emitters to your animations. By the end of this book, you’ll have created a number of different animation projects, and will have gained a deep understanding of SwiftUI that can be used for your own creations.
Table of Contents (18 chapters)

Creating falling snow in the scene

Making snow fall within your app really makes it come alive: it gives a rather magical look to it and sets the right mood for our winter scene. To do this, we need to utilize the power of UIKit and the UIViewRepresentable protocol, along with the CAEmitter class.

Note

As you continue through the rest of this chapter, don’t worry if some of the UIKit classes and methods look different or unfamiliar to you as compared to the SwiftUI classes and methods we’ve been using. That’s because they are different, and that’s for a whole different book if you’d like to learn about UIKit. However, moving forward in this chapter, I will explain the different UIKit properties and methods used to make the snow for our animation, so you can get familiar with the process.

Adding the UIViewRepresentable protocol

The UIViewRepresentable protocol is what’s called a wrapper for UIKit. It allows SwiftUI to work with...