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.

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Table of Contents (17 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
1
Getting Started with SwiftUI
Getting Started with SwiftUI
Technical requirements
Introducing Swift as a programming language
Learning about existing UI frameworks
Introducing SwiftUI
When to use SwiftUI, and why
Summary
Questions
Further reading
Free Chapter
2
Understanding Declarative Syntax
Understanding Declarative Syntax
Technical requirements
What is declarative syntax?
Visualizing declarative syntax
Nesting and decoration
Imperative syntax
Summary
Questions
Further reading
3
Building Layout and Structure
Building Layout and Structure
Technical requirements
Understanding UI logic – the MVVM architecture
Design patterns in SwiftUI
Summary
Questions
Further reading
4
Creating Your First Application
Creating Your First Application
Technical requirements
Xcode, as an IDE
Core components of Xcode
Mock data in Automatic Preview
Summary
Questions
Further reading
5
Understanding Controls, Views, and Lists
Understanding Controls, Views, and Lists
Technical requirements
Exploring and understanding Text and decoration
Creating custom Views in Lists
Adding more controls
Summary
Further reading
6
Working with Navigation in SwiftUI
Working with Navigation in SwiftUI
Technical requirements
Creating additional Views
App navigation
Accessing with @EnvironmentObject
Summary
Questions
Further reading
7
Creating a Form with States and Data Binding
Creating a Form with States and Data Binding
Technical requirements
Creating our recipe form View
Adding images from our library
Adding a multiline text input and country picker
Persisting our recipe
Summary
Questions
8
Networking and Linking to Your Existing App Logic
Networking and Linking to Your Existing App Logic
Technical requirements
Basic networking in SwiftUI
Integrating UIViews with UIViewRepresentable
Integrating ViewControllers with UIViewControllerRepresentable
Other representable protocols
Summary
Questions
Further reading
9
Maps and Location Services
Maps and Location Services
Technical requirements
Adding a Map with MapKit control
Creating our first pin
Identifying our location
Piecing it all together
Summary
Questions
Further reading
10
Updating for iPad with NavigationViewStyle
Updating for iPad with NavigationViewStyle
Technical requirements
Updating our project for iPad
Running our app on iPad for the first time
Making better use of NavigationViewStyle
Summary
Questions
Further reading
11
SwiftUI on watchOS
SwiftUI on watchOS
Technical requirements
Developing for watchOS
Creating a watchOS project
Using SwiftUI to create a list of recipes
Passing data between our app and watchOS
Summary
Questions
Further reading
12
SwiftUI versus UIKit
SwiftUI versus UIKit
Technical requirements
List view versus UITableView
Data Binding versus Data Source
Comparing decoration techniques
Migrating UIKit ready for SwiftUI
Summary
Questions
13
Basic Animation in Views
Basic Animation in Views
Technical requirements
The fundamental use of animations
Exploring animation options
Rotation and scaling
Adding animation to our app
Summary
Questions
Further reading
14
Animations in Transitions
Animations in Transitions
Technical requirements
Basic transitions
Advanced transitions
Adding transitions to our app
Summary
Questions
15
Testing in SwiftUI
Testing in SwiftUI
Technical requirements
Creating a UI/Unit Test project
Creating our first Unit Test project and tests
Debugging in SwiftUI
Summary
Questions
Further reading
16
Other Books You May Enjoy
Other Books You May Enjoy
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Making better use of NavigationViewStyle

As we saw earlier in this chapter, supporting iPadOS is now a default option when creating your app project, and most developers (unless specifically told otherwise) will quite happily leave this option ticked.

Sometimes developers get lucky and the iPad version of their app just works—others take the time to completely redesign an iPad-specific version of the app and submit this separately to the App Store. But more often than not, there will be an iPadOS version of your app that is not so much broken but a little unloved.

In this section, we'll show you how with SwiftUI and a little bit of upfront thought, you can support iPadOS almost out of the box.

Other NavigationViewStyle options

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