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)

Implementing a Tic-Tac-Toe game in SwiftUI

SwiftUI's drawing primitives are powerful, and it is even possible to implement a game using these only.

In this recipe, we'll see how to build a simple touchable and playable Tic-Tac-Toe game, in which the game alternates between inserting a cross and a nought every time you put your finger on a cell of the board.

For those who are unfamiliar with the game, Tic-Tac-Toe is a paper-and-pencil game where two players take turns to mark either a cross or a circle, also called a nought, in a 3x3 grid. The player who is able to place three of their marks in a line horizontally, vertically, or diagonally, wins.

Getting ready

For this recipe, we don't need any external resources, so it is enough just to create a SwiftUI project in Xcode called TicTacToeApp to hit the ground running.

How to do it...

As you know, Tic-Tac-Toe is composed of three components:

  • A nought (circle)
  • A cross
  • The game grid
  • ...