Implementing a Tic-Tac-Toe game in SwiftUI
SwiftUI's drawing primitives are powerful, and it is even possible to implement a game using just these. In this recipe, we will learn 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 can 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 TicTacToe to hit the ground running.
How to do it…
As you may imagine, Tic-Tac-Toe is composed of three components:
- The game grid
- A nought (circle)
- A cross
Using SwiftUI, we can model these components...