index.js

import React from "react";
import ReactDOM from "react-dom";
import "./index.css";

//1.1.1
function Square(props) {
  // constructor(props) {
  //   super(props);
  //   this.state = {
  //     value: null,
  //   };
  // }

  return (
    <button className="square" onClick={props.onclick}>
      <font color={props.color}>{props.value}</font>
    </button>
  );
}

//1.1
class Board extends React.Component {
  // constructor(props) {
  //   super(props);
  //   this.state = {
  //     squares: Array(9).fill(null),
  //     XIsNext: true,
  //   };
  // }

  renderSquare(i) {
    let color;
    if (this.props.lines && this.props.lines.includes(i)) {
      color = "red";
    } else {
      color = "black";
    }

    return (
      <Square
        color={color}
        value={this.props.squares[i]}
        onclick={() => this.props.onclick(i)}
        key={i}
      />
    );
  }

  render() {
    return (
      <div>
        {Array(3)
          .fill(null)
          .map((item1, i) => {
            return (
              <div className="board-row" key={i}>
                {Array(3)
                  .fill(null)
                  .map((item2, j) => {
                    return this.renderSquare(3 * i + j);
                  })}
              </div>
            );
          })}
      </div>
    );
  }
}
//1
class Game extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      history: [
        {
          squares: Array(9).fill(null),
          x: 0,
          y: 0,
        },
      ],
      stepNumber: 0,
      XIsNext: true,
      change: true,
    };
  }
  handleClick(i) {
    const history = this.state.history.slice(0, this.state.stepNumber + 1);
    const current = history[history.length - 1];
    const squares = current.squares.slice();
    // console.log(i,"i")
    if (calculateWinner(squares).winner || squares[i]) {
      return;
    }
    squares[i] = this.state.XIsNext ? "X" : "O";

    this.setState({
      history: history.concat([
        {
          squares: squares,
          x: Math.floor(i / 3),
          y: i % 3,
        },
      ]),
      stepNumber: history.length,
      XIsNext: !this.state.XIsNext,
    });
  }
  jumpTo(step) {
    this.setState({
      stepNumber: step,
      XIsNext: step % 2 === 0,
    });
  }
  changeDesc() {
    this.setState({
      change: !this.state.change,
    });
    console.log(this.state.change);
  }
  render() {
    const history = this.state.history;
    const current = history[this.state.stepNumber];
    // const winner = calculateWinner(current.squares);
    const result = calculateWinner(current.squares);
    const winner = result.winner;
    // console.log(winner,'winner')
    const lines = result.winnerlines;
    // console.log(lines,'1lines23')
    const change = this.state.change;
    var moves = history.map((step, move) => {
      const desc = move ? "Go to move #" + move : "Go to game start";
      const blod = this.state.stepNumber === move ? "blod" : "";
      return (
        <li key={move}>
          <button onClick={() => this.jumpTo(move)} className={blod}>
            {desc}({step.x + 1}:{step.y + 1})
          </button>
        </li>
      );
    });
    // console.log(moves, "moves");
    let status;
    let changeDes;
    //  console.log(moves.length,'moves.length') 最长10格  也就是
    if (moves.length - 1 === 9 && typeof lines == "undefined") {
      moves.push('平局')
    
    }
    if (change) {
      changeDes = "升序";
    } else {
      changeDes = "降序";
      moves = moves.reverse();
    }

    if (winner) {
      status = "winner" + winner;
    } else {
      status = "Next player :" + (this.state.XIsNext ? "X" : "O");
    }
    return (
      <div className="game">
        <div className="game-board">
          <Board
            lines={lines}
            squares={current.squares}
            onclick={(i) => this.handleClick(i)}
          />
        </div>
        <div className="game-info">
          <div>{status}</div>
          <button onClick={() => this.changeDesc()}>{changeDes}</button>
          <ol>{moves}</ol>
        </div>
      </div>
    );
  }
}
// 1 从calculateWinner拿到谁赢了  且赢的坐标
// 2 把值给调用calculateWinner的地方，并且修改。
// 3 给出条件何时棋子变红，也就是 胜利的坐标出现并且包含在记录里面
// 4 观察哪地方渲染的棋子，然后给颜色即可
function calculateWinner(squares) {
  const lines = [
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 3, 6],
    [1, 4, 7],
    [2, 5, 8],
    [0, 4, 8],
    [2, 4, 6],
  ];
  for (let i = 0; i < lines.length; i++) {
    const [a, b, c] = lines[i];
    if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
      // console.log(lines[i], "winnerlines");
      return { winner: squares[a], winnerlines: lines[i] };
    }
  }
  return { winner: null, lines: null };
}
// ========================================

ReactDOM.render(<Game />, document.getElementById("root"));