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  • Book Overview & Buying SwiftUI Cookbook
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SwiftUI Cookbook

SwiftUI Cookbook - Second Edition

By : Giordano Scalzo, Edgar Nzokwe
4.3 (20)
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SwiftUI Cookbook

SwiftUI Cookbook

4.3 (20)
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)
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Implementing a progress ring

Admit it – since you bought your Apple Watch, you are getting fitter, aren't you? I bet it is because of the activity rings you want to close every day. Am I right?

In this recipe, we'll implement a progress ring similar to those on the Apple Watch, and we'll change its value via some sliders.

Getting ready

You don't need to prepare anything for this recipe; just create a SwiftUI project called ProgressRings.

How to do it…

We are going to implement two components:

  • A single ProgressRing View
  • A composite RingsView

We'll add the latter to ContentView, and we'll simulate progress using three sliders.

To do this, follow these steps:

  1. Implement a ring view using a Shape object and an arc:
    struct ProgressRing: Shape {
        private let startAngle = Angle.radians(1.5 * .pi)
        @Binding
        var progress: Double
     ...
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SwiftUI Cookbook
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