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我做的React Tic Tac Toe starter tutorial且在一开始的问题....反应教程：状态不工作
每平方米应显示其state.value，有一个的onClick方法，设置状态设置为“X” 。点击时应该更新图形用户界面，但不是......我无法在代码中发现错误，对吗？
class Square extends React.Component {
constructor() {
super();
this.state = {value: null};
}
setState(s) {this.state = s;}
render() {
return (
<button className="square" onClick={() => this.setState({value:'X'})}>
{this.state.value}
</button>
);
}
}
class Board extends React.Component {
renderSquare(i) {
return <Square value={i}/>;
}
render() {
const status = 'Next player: X';
return (
<div>
<div className="status">{status}</div>
<div className="board-row">
{this.renderSquare(0)}
{this.renderSquare(1)}
{this.renderSquare(2)}
</div>
<div className="board-row">
{this.renderSquare(3)}
{this.renderSquare(4)}
{this.renderSquare(5)}
</div>
<div className="board-row">
{this.renderSquare(6)}
{this.renderSquare(7)}
{this.renderSquare(8)}
</div>
</div>
);
}
}
class Game extends React.Component {
render() {
return (
<div className="game">
<div className="game-board">
<Board />
</div>
<div className="game-info">
<div>{/* status */}</div>
<ol>{/* TODO */}</ol>
</div>
</div>
);
}
}
// ========================================
ReactDOM.render(
<Game />,
document.getElementById('container')
);
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]) {
return squares[a];
}
}
return null;
}
你为什么要重写国家本身。你应该更新状态内的属性。试试'this.setState（{value：s}）'。 – Rajesh