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)

Implementing a Markdown editor with Preview

Markdown is a lightweight markup language to create rich text using a text editor. In recent years, it has become ubiquitous: you can use it in GitHub, when asking and replying to questions in Stack Overflow, for messaging in Discord, and more.

SwiftUI provides support to Markdown tags in the Text components.

In this recipe, we'll experiment with Markdown, implementing a simple text editor.

Getting ready

This recipe doesn't require any particular preliminary operations apart from creating an Xcode project called MarkdownEditor.

How to do it…

Taking inspiration from the GitHub pull request comment textbox, we are going to implement an app with two tabs: a text editor and a preview where the text is rendered as rich text, with bold, italics, and so on.

EditorView has a tab bar above the editor itself for adding tags for bold, italics, strikethrough, and code.

Let's get started. Follow these steps...