Book Image

Learn SwiftUI

By : Chris Barker
Book Image

Learn SwiftUI

By: Chris Barker

Overview of this book

SwiftUI is the new and powerful interface toolkit that lets you design and build iOS, iPadOS, and macOS apps using declarative syntax. It is a powerful way to develop the UI elements of applications, which would normally be tightly coupled to application logic. Learn SwiftUI will get you up to speed with the framework and cross-device UI development in no time. Complete with detailed explanations and practical examples, this easy-to-follow guide will teach you the fundamentals of the SwiftUI toolkit. You'll learn how to build a powerful iOS and iPadOS application that can be reused for deployment on watchOS. As you progress, you'll delve into UI and unit testing in iOS apps, along with learning how to test your SwiftUI code for multiple devices. The book will also show you how to integrate SwiftUI features such as data binding and network requests into your current application logic. By the end of this book, you will have learned how to build a cross-device application using the SwiftUI framework and Swift programming.
Table of Contents (17 chapters)

Rotation and scaling

For those seasoned programmers among us, you'll know that in the past, with a variety of programming languages, manipulating views or screens in terms of rotation, scale, or even geometry required a small understanding of some form of mathematics.

Luckily, with SwifuUI, operations such as rotating and scaling UI elements are a piece of cake. In this section, we're going to look at an API that adds a 3D feel to an element being rotated.


Let's start by looking at rotation. We'll begin by creating another button. This time, we'll decorate it a little (you'll see why later):

struct ContentView: View {
var body: some View {

Button("Rotate") {