我是 react 新手，并尝试构建一个表格组件，该组件根据标题和行传入的内容进行更改。
我一直在关注fb react 教程，但我遇到了一个障碍，我在这里查看并做了一些更改，但没有任何效果。
这是我的 HTML 页面，它获取生成的内容。
<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset='utf-8'>
<meta http-equiv="X-UA-Compatible" content="IE=10; IE=9; IE=8; IE=7; IE=EDGE" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/css/bootstrap-datepicker3.css"/>
<link rel="stylesheet" type="text/css" href="/vendor/twbs/bootstrap/dist/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="/vendor/etdsolutions/sweetalert/sweetalert.css?<?= assetCacheQueryStr() ?>" />
<link rel="stylesheet" type="text/css" href="/lib/jquery-ui-1.11.4/jquery-ui.css">
<link rel="stylesheet" type="text/css" media="screen" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.9.3/css/bootstrap-select.min.css">
<!-- Javascript -->
<script src="https://unpkg.com/react@15.3.2/dist/react.js"></script>
<script src="https://unpkg.com/react-dom@15.3.2/dist/react-dom.js"></script>
<script src="https://unpkg.com/babel-core@5.8.38/browser.min.js"></script>
<script src="https://unpkg.com/jquery@3.1.0/dist/jquery.min.js"></script>
<script src="https://unpkg.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
<script src="/vendor/etdsolutions/sweetalert/sweetalert.min.js?<?= assetCacheQueryStr()?>"></script>
<script src="/vendor/twbs/bootstrap/dist/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.9.3/js/bootstrap-select.min.js"></script>
<script src="/lib/sorttable.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/js/bootstrap-datepicker.min.js"></script>
<title>React</title>
</head>
<body>
<div id="loadboardContainer"></div>
<!-- Import the table react setup. -->
<script type="text/babel" src="test.js"></script>
</body>
</html>
现在我在 test.js 文件中有外部 react 脚本，就是这个。
var Table = React.createClass({
getInitialState: function() {
return {
results: [],
columns: []
}
},
componentDidMount: function() {
this.serverRequest = $.get(this.props.source, function(result) {
result = JSON.parse(result);
this.setState({
results: result['resultRows'],
columns: $.makeArray(result['resultCols'])
});
}.bind(this));
},
componentWillUnmount: function(){
this.serverRequest.abort();
},
render: function() {
// Set array for rows.
var rows = [];
var header = [];
this.state.columns.map(function(cols) {
header.push(<TableColumns data={cols.cols} key={cols.id} />);
});
this.state.results.map(function(result) {
rows.push(<TableRow data={result.rows} key={result.id} />);
});
// Loop through head to get columns.
/*this.props.columns.forEach(function(cols) {
header.push(<TableColumns data={cols.cols} key={cols.id} />);
});
// Loop through the returned rows and display.
this.props.results.forEach(function(result) {
rows.push(<TableRow data={result.rows} key={result.id} />);
});*/
// Return the table.
return (
<table className="table table-condensed">
<thead>
{header}
</thead>
<tbody>
{rows}
</tbody>
</table>
);
}
});
// Set up columns
var TableColumns = React.createClass({
render: function() {
var colNodes = this.props.data.map(function(col, i){
return (
<th key={i}>{col}</th>
);
});
return (
<tr>
{colNodes}
</tr>
);
}
});
// Set up row
var TableRow = React.createClass({
render: function() {
var rowNodes = this.props.data.map(function(row, i){
return (
<td key={i}>{row}</td>
);
});
return (
<tr>
{rowNodes}
</tr>
);
}
});
var futureContainer = document.getElementById('loadboardContainer');
ReactDOM.render(<Table source="getTableValues.php" />, futureContainer);
正如你所看到的，我已经注释掉了以前对表的 props 调用的部分。现在我正在尝试从另一个文件中获取信息，在这里我必须使用状态。
在另一个文件上，这就是我所拥有的。它只是一个数组数组，用于在我实际查询内容之前返回数据。
<?php
// Start the session.
session_start();
// Set Variables.
$returned = array(); // Returns results
$returned['resultRows'][0] = array();
$returned['resultRows'][0]['id'] = 10221;
$returned['resultRows'][0]['rows'] = array("654221", "2016-03-26", "Customer 1", "98755/54622", "Carrier 1", "Driver 1", "2016-03-28", "TX - IN", "DRY", "1240", "", "", "This is a test note");
$returned['resultRows'][1] = array();
$returned['resultRows'][1]['id'] = 10223;
$returned['resultRows'][1]['rows'] = array("654221", "2016-03-26", "Customer 1", "98755/54622", "Carrier 2", "Driver 2", "2016-03-28", "TX - IN", "DRY", "1240", "", "", "This is a test note2");
$returned['resultCols']['id'] = 100;
$returned['resultCols']['cols'] = array("PO Number", "Load Date", "Customer(s)", "Customer PO", "Carrier", "Driver", "Delivery Date", "Lane", "Temp", "Weight", "Attention Date", "ND Date", "Notes");
echo json_encode($returned);
?>
我不断收到错误 this.state.columns.map 不是函数。 如果我使用 this.props 也是如此。那么我在这方面做错了什么？如果我静态地放入数据并以这种方式插入到该页面上，但调用不起作用，我知道如何使其工作。
最佳答案
由于异步 $.get，您尝试在开头映射字符串
替换这个:
getInitialState: function() {
return {
results: '',
columns: ''
}
}
通过这个:
getInitialState: function() {
return {
results: [],
columns: []
}
}
编辑以匹配 PHP 返回
var Table = React.createClass({
getInitialState: function() {
return {
results: [],
columns: []
}
},
componentDidMount: function() {
this.serverRequest = $.get(this.props.source, function(result) {
result = JSON.parse(result);
this.setState({
results: result['resultRows'],
columns: result['resultCols'].cols
});
}.bind(this));
},
componentWillUnmount: function(){
this.serverRequest.abort();
},
render: function() {
// Return the table.
return (
<table className="table table-condensed">
<thead>
<TableColumns data={this.state.columns} />
</thead>
<tbody>
{this.state.results.map(function(result) {
rows.push(<TableRow data={result.rows} key={result.id} />);
})}
</tbody>
</table>
);
}
});
// Set up columns
var TableColumns = React.createClass({
render: function() {
var colNodes = this.props.data.map(function(col, i){
return (
<th key={i}>{col}</th>
);
});
return (
<tr>
{colNodes}
</tr>
);
}
});
// Set up row
var TableRow = React.createClass({
render: function() {
var rowNodes = this.props.data.map(function(row, i){
return (
<td key={i}>{row}</td>
);
});
return (
<tr>
{rowNodes}
</tr>
);
}
});
var futureContainer = document.getElementById('loadboardContainer');
ReactDOM.render(<Table source="getTableValues.php" />, futureContainer);
关于javascript - react 数据拉取不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39854681/