Book Image

SwiftUI Cookbook

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook

By: Giordano Scalzo, Edgar Nzokwe

Overview of this book

SwiftUI is an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, right from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based book, you’ll work with SwiftUI and explore a range of essential techniques and concepts that will help you through the development process. The recipes cover the foundations of SwiftUI as well as the new SwiftUI 2.0 features introduced in iOS 14. Other recipes will help you to make some of the new SwiftUI 2.0 components backward-compatible with iOS 13, such as the Map View or the Sign in with Apple View. The cookbook begins by explaining how to use basic SwiftUI components. Then, you’ll learn the core concepts of UI development such as Views, Controls, Lists, and ScrollViews using practical implementation in Swift. By learning drawings, built-in shapes, and adding animations and transitions, you’ll discover how to add useful features to the SwiftUI. When you’re ready, 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 while 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 found in building SwiftUI apps.
Table of Contents (15 chapters)

Embedding a MapView in SwiftUI

A handy feature of a smartphone, and iOS in particular, is its capacity to replace a car satellite navigation system, showing where you are and the best route to reach your destination.

Since the introduction of the first iPhone, more than 10 years ago, iOS provides a sophisticated map view.

It was initially provided by Google, but since iOS 6, Apple replaced it with its own version. In iOS 14, SwiftUI supports it natively with a Map component.

In this recipe, we'll implement a simple app based on the MapKit framework, where we can set several favorite places. A viewfinder image in the center of the view allows us to add a favorite when we tap on the add favorite (+) button.

Getting ready

Let's implement a SwiftUI app called MapInSwiftUIApp in Xcode. Since this recipe is only for iOS 14, set the deployment target to iOS 14.

How to do it

In a few steps, we are going to create a map centered on the UK with a viewfinder...