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)

Showing and hiding sections in forms

Forms provide a means of getting information from the user. Users get discouraged when completing very long forms, yet fewer people submitting a form may mean less data for your surveys, fewer signups for your app, or fewer people providing whatever data you're collecting.

In this recipe, we will learn how to show/hide the additional address section of a form based on the user's input.

Getting ready

Create a new SwiftUI project named SignUp.

How to do it…

We will create a signup form with sections for various user inputs. One of the sections, additional address, will be shown or hidden based on how long the user has lived at their current address.

The steps are given here:

  1. Create a new SwiftUI view called signUpView:

    a. Press Command () + N.

    b. Select SwiftUI View.

    c. Click Next.

    d. Name the view signUpView.

    e. Click Finish.

  2. In signUpView, declare and initialize the @State variables that will be used in...