0
我在渲染父级时遇到了React JS渲染子级的一些问题。 这里我试图实现“游戏人生”（Freecodecamp类的一个项目）。 我被困在这种情况下。我点击一个死细胞，它变得活着（蓝色）。然后，假设我想清除网格，即使所有单元格都死掉，但它不起作用。看起来，即使重新渲染父母也不会重新渲染孩子。React JS渲染父级不再渲染子级
有什么想法？
var board = [];
var width = 80;
var length = 50;
var cells = width * length;
var states = ["alive", "dead"];
class BoardGrid extends React.Component {
constructor(props) {
super(props);
//this.initBoardArray = this.initBoardArray.bind(this);
}
render() {
//this.initBoardArray();
let boardDOM = this.props.board.map(function(cell) {
return <BoardGridCell status={cell.status} id={cell.id} />;
});
return (
<div id="game-grid">
{boardDOM}
</div>
);
}
}
class BoardGridCell extends React.Component {
render() {
return (
<div
id={this.props.id}
className={`cell ${this.props.status}`}
data-status={this.props.status}
/>
);
}
}
function initBoard() {
for (let cellIndex = 0; cellIndex < cells; cellIndex++) {
let cell = { id: cellIndex, status: "dead" };
board[cellIndex] = cell;
}
}
function drawBoard() {
ReactDOM.render(
<BoardGrid board={board} />,
document.getElementById("game-grid-wrapper")
);
}
function clearBoard() {
for (let cellIndex = 0; cellIndex < cells; cellIndex++) {
let cell = { id: cellIndex, status: "dead" };
board[cellIndex] = cell;
}
}
$("#game-grid-wrapper").on("click", ".cell", function() {
let currentState = $(this).attr("data-status");
let currentStateIndex = states.indexOf(currentState);
let newState = states[(currentStateIndex + 1) % 2];
$(this).attr("class", `cell ${newState}`);
$(this).attr("data-status", newState);
});
$("#stop").on("click", function() {
alert("clearing");
clearBoard();
drawBoard();
});
initBoard();
drawBoard();html,
body {
height: 100%;
text-align: center;
font-family: 'Open Sans', sans-serif;
}
h1,
h2 {
font-family: 'Press Start 2P', cursive;
}
.button {
width: 100px;
border: 1px solid #555;
padding: 5px;
margin: 5px;
cursor: pointer;
border-radius: 4px;
}
.button:hover {
opacity: 0.9;
}
#main {
margin: 10px;
}
#game-grid {
background-color: #000;
display: flex;
flex-wrap: wrap;
align-content: flex-start;
width: 800px;
height: 500px;
overflow: hidden;
}
#game-grid .cell {
border: 1px solid #767676;
width: 10px;
height: 10px;
color: #fff;
font-size: 9px;
box-sizing: border-box;
}
.alive {
background-color: #2185d0;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="main">
<div id="game-actions">
<div id="start" class="button"><i class="fa fa-play"></i> Start</div>
<div id="pause" class="button"><i class="fa fa-pause"></i> Pause</div>
<div id="stop" class="button"><i class="fa fa-stop"></i> Stop</div>
</div>
<div id='game-grid-wrapper'></div>
</div>