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SwiftUI Cookbook

SwiftUI Cookbook

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

SwiftUI Cookbook

4.3 (20)
By: Giordano Scalzo, 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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Applying a delay to a withAnimation function to create a sequence of animations

As we mentioned in the previous recipe, SwiftUI doesn't have a way to define a chain of animations yet, but this can be simulated using delay animations.

As mentioned in the previous recipe, there are two ways of defining an animation:

  • Using the .animation() view modifier
  • Using the withAnimation function

In this recipe, we'll see how to use the withAnimation function. We covered the .animation() view modifier in the previous recipe, Applying a delay to a view modifier animation to create a sequence of animations.

Getting ready

This recipe doesn't need any external resources, so let's just create a SwiftUI project called DelayedAnimations.

How to do it…

To illustrate the delay applied to the withAnimation function, we are going to implement an app that presents three text elements that appear and disappear in sequence when tapping on a button:

...

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