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下面是一个完整的 Tic-Tac-Toe（井字棋）游戏的实现，用 React 构建。包括核心逻辑和组件分离，支持两人对战。
1. 初始化 React 项目：
npx create-react-app tic-tac-toe
cd tic-tac-toe
2.文件结构
src/
├── App.js
├── Board.js
├── Square.js
└── index.js
Step 1: Square.js - 单个方块组件
import React from 'react';const Square = ({ value, onClick }) => {return (<button className="square" onClick={onClick} style={{width: '60px',height: '60px',fontSize: '24px',cursor: 'pointer'}}>{value}</button>);
};export default Square;
Step 2: Board.js - 棋盘组件
import React from 'react';
import Square from './Square';const Board = ({ squares, onClick }) => {const renderSquare = (i) => {return <Square value={squares[i]} onClick={() => onClick(i)} />;};return (<div style={{display: 'flex',flexDirection: 'column',justifyContent: 'center',alignItems: 'center',}}><div style={{ display: 'flex' }}>{renderSquare(0)}{renderSquare(1)}{renderSquare(2)}</div><div style={{ display: 'flex' }}>{renderSquare(3)}{renderSquare(4)}{renderSquare(5)}</div><div style={{ display: 'flex' }}>{renderSquare(6)}{renderSquare(7)}{renderSquare(8)}</div></div>);
};export default Board;
Step 3: App.js - 游戏逻辑和主组件
import React, { useState } from 'react';
import Board from './Board';const App = () => {const [squares, setSquares] = useState(Array(9).fill(null));const [isXNext, setIsXNext] = useState(true);const calculateWinner = (squares) => {const lines = [[0, 1, 2], [3, 4, 5], [6, 7, 8], // Rows[0, 3, 6], [1, 4, 7], [2, 5, 8], // Columns[0, 4, 8], [2, 4, 6] // Diagonals];for (let [a, b, c] of lines) {if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {return squares[a];}}return null;};const winner = calculateWinner(squares);const handleClick = (i) => {if (squares[i] || winner) return; // Ignore if square is already filled or game is wonconst nextSquares = squares.slice();nextSquares[i] = isXNext ? 'X' : 'O';setSquares(nextSquares);setIsXNext(!isXNext);};const restartGame = () => {setSquares(Array(9).fill(null));setIsXNext(true);};const status = winner ? `Winner: ${winner}` : `Next Player: ${isXNext ? 'X' : 'O'}`;return (<div style={{ textAlign: 'center', marginTop: '50px' }}><h1>Tic-Tac-Toe</h1><Board squares={squares} onClick={handleClick} /><h3>{status}</h3><button onClick={restartGame} style={{ padding: '10px 20px', marginTop: '20px' }}>Restart</button></div>);
};export default App;
Step 4: index.js - 渲染应用
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';ReactDOM.render(<App />, document.getElementById('root'));
3. 启动应用：
npm start
打开浏览器，访问 http://localhost:3000 即可运行。如图所示：
希望这些内容对你有所帮助！如果有任何问题，欢迎随时提问。