Book Image

SwiftUI Cookbook - Second Edition

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook - Second Edition

By: Giordano Scalzo, Edgar Nzokwe

Overview of this book

SwiftUI provides an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based cookbook, you’ll cover the foundations of SwiftUI as well as the new SwiftUI 3 features introduced in iOS 15 and explore a range of essential techniques and concepts that will help you through the development process. The cookbook begins by explaining how to use basic SwiftUI components. Once you’ve learned the core concepts of UI development, such as Views, Controls, Lists, and ScrollViews, using practical implementations in Swift, you'll advance to adding useful features to SwiftUI using drawings, built-in shapes, animations, and transitions. 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 by 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 encountered when building SwiftUI apps.
Table of Contents (17 chapters)

Applying multiple animations to a view

SwiftUI allows us to animate multiple features at the same time, and they can also be animated using different durations and different animation curves.

In this recipe, we'll learn how to animate two sets of features and how to make the result look like one single, smooth animation.

Getting ready

Let's create a SwiftUI project called MultipleAnimations.

How to do it…

To illustrate how you can apply multiple animations to a view, we are going to create a rectangle that has two sets of animations:

  • One set with the color, the vertical offset, and the rotation around the X axis
  • One set with the scale and a rotation around the Z axis

We are using an .easeInOut curve for the former and .linear for the latter. To do this, follow these steps:

  1. Let's start by adding the rectangle and the button to trigger the change:
    struct ContentView: View {
        @State
       ...