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)

Creating our first Unit Test project and tests

In this section, we are going to take a look at the other side of the testing pond and discover what Unit Tests are and why they are just as important as UI Tests. We'll start by creating a Unit Test project within our current Xcode project and create our first test.

Creating a Unit Test project

As opposed to UI Tests, Unit Tests are designed to test specific pieces of logic within your app. For example, you may have a function that calculates a complex algorithm, which would then be used in multiple places within your app.

Writing a Unit Test for this function will give you the confidence of being able to update your logic without having to worry about any breaking changes...