Book Image

SwiftUI Cookbook

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook

By: Giordano Scalzo, Edgar 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)

Creating basic animations

Let's introduce the way to animate in SwiftUI with a simple app that moves a component on the screen.

SwiftUI brings a few predefined temporal curves: .easeInOut, .linear, .spring, and so on. In this recipe, we'll compare them against the default animation.

We are going to implement two circles that move to the top or the bottom of the screen. One circle moves using the default animation, and the other with the selected animation; we can then select the other animation using an action sheet, which is a modal view that appears from the bottom.

Getting ready

Let's implement a SwiftUI app called BasicAnimationsApp.

How to do it…

This is a super simple app where we are going to render two circles, a red and a blue one, and an action sheet to choose the animation for the red circle, while the animation for the blue circle is always the default one.

We will select the animation for the red circle with a button that presents...