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)

Creating a banner with a spring animation

A nice and configurable easing function is the spring, where the component bounces around the final value. We are going to implement a banner that is usually hidden, and when it appears, it moves from the top with a spring animation.

Getting ready

No external resources are needed, so let's just create a SwiftUI project in Xcode called BannerWithASpringAnimation.

How to do it…

This is a really simple recipe, where we create a banner view that can be animated when we tap on a button:

  1. Implement BannerView:
    struct BannerView: View {
        let message: String
        var show: Bool
        
        var body: some View {
            Text(message)
             .font(.title)
             .frame(width:UIScreen.main.bounds.width - 20,
     ...