Book Image

An iOS Developer's Guide to SwiftUI

By : Michele Fadda
Book Image

An iOS Developer's Guide to SwiftUI

By: Michele Fadda

Overview of this book

– SwiftUI transforms Apple Platform app development with intuitive Swift code for seamless UI design. – Explore SwiftUI's declarative programming: define what the app should look like and do, while the OS handles the heavy lifting. – Hands-on approach covers SwiftUI fundamentals and often-omitted parts in introductory guides. – Progress from creating views and modifiers to intricate, responsive UIs and advanced techniques for complex apps. – Focus on new features in asynchronous programming and architecture patterns for efficient, modern app design. – Learn UIKit and SwiftUI integration, plus how to run tests for SwiftUI applications. – Gain confidence to harness SwiftUI's full potential for building professional-grade apps across Apple devices.
Table of Contents (25 chapters)
Free Chapter
1
Part 1: Simple Views
5
Part 2: Scrollable Views
8
Part 3: SwiftUI Navigation
11
Part 4: Graphics and Animation
14
Part 5: App Architecture
17
Part 6: Beyond Basics

Playgrounds

Swift Playgrounds is an excellent way to test Swift code without creating an app or a complete project.

Unfortunately, Swift Playgrounds was developed for UIKit and does not completely support SwiftUI.

In Xcode, there is an option to create a Playground containing a view, but that will create a view with ViewController using UIKit, not SwiftUI, and that’s not ideal for our purposes.

You can, however, start with an empty Playground and create your view in code with SwiftUI and then set it as the current view by using PlaygroundPage.current.setLiveView(ContentView()).

Your code will look like this:

import SwiftUI
import PlaygroundSupport
struct ContentView: View {
    var body: some View {
        Text("I love SwiftUI")
    }
}
PlaygroundPage.current.setLiveView(ContentView())

However, the support for SwiftUI in Swift Playgrounds is far from ideal, and not updated...