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)

Filling out forms easily using Focus and Submit

Filling out forms can be tedious if the user has to manually click on each field, fill it out, and then click on the next field. An easier and faster way would be to use a button on the keyboard to navigate from one form field to the next.

In this recipe, we will create an address form with easy navigation between the various fields.

Getting ready

Create a new SwiftUI project named FocusAndSubmit.

Check the project's build settings and make sure the iOS target version is set to 15.0 or higher.

How to do it…

We add some text fields for various address fields within a VStack component and use @FocusState to navigate between them and submit the filled-out form at the end. The steps are given here:

  1. Open the ContentView.swift file and add an enum for the fields of an address:
    struct ContentView: View {
        enum AddressField{
            case streetName...