很抱歉看起来像是一个新手问题(一直在工作到很晚,刚刚开始使用React)但是我想弄清楚如何用 n x <来渲染一个简单的表strong> n 维度。
例如,在我的组件中,渲染输出将是这样的:
<table id="simple-board">
<tbody>
<tr id="row0">
<td id="cell0-0"></td>
<td id="cell0-1"></td>
<td id="cell0-2"></td>
</tr>
<tr id="row1">
<td id="cell1-0"></td>
<td id="cell1-1"></td>
<td id="cell1-2"></td>
</tr>
<tr id="row2">
<td id="cell2-0"></td>
<td id="cell2-1"></td>
<td id="cell2-2"></td>
</tr>
</tbody>
</table>
其中每一行都有自己的ID,以及每个单元格。
初始状态
constructor(props){
super(props);
this.state = {size: 3}
}
是设置表格大小的内容。
让我感到害怕的是如何在JSX中实现for循环。
答案 0 :(得分:18)
import React, { Component } from 'react'
export default class Example extends Component {
constructor(props){
super(props);
this.state = {size: 3}
}
render(){
let rows = [];
for (var i = 0; i < this.state.size; i++){
let rowID = `row${i}`
let cell = []
for (var idx = 0; idx < this.state.size; idx++){
let cellID = `cell${i}-${idx}`
cell.push(<td key={cellID} id={cellID}></td>)
}
rows.push(<tr key={i} id={rowID}>{cell}</tr>)
}
return(
<div className="container">
<div className="row">
<div className="col s12 board">
<table id="simple-board">
<tbody>
{rows}
</tbody>
</table>
</div>
</div>
</div>
)
}
}
感谢大家的回复!
答案 1 :(得分:1)
这样的事情:
<table id="simple-board">
<tbody>
{this.props.yourData.slice(0,this.state.size).map((item , index)=>{
return(
<tr key={index} id={`row${index}`}>
{item.felanBisar.map((item2,index2)=>{
return(
<td id={`cell${index}-{index2}`}></td>
);
})}
</tr>
);
})}
</tbody>
</table>
答案 2 :(得分:0)
一个选项(将内容移出render()
:
import React from 'react';
import SimpleListMenu from '../menu/SimpleMenuListMenu'; // < Material UI element
let rows = [
'Setting One',
'Setting Two',
'Setting Three',
'Setting Four',
];
export default class MyTable extends React.Component {
createTable = () => {
let table = []
for (let i = 0; i < rows.length; i++) {
let children = []
children.push(<td>{rows[i]}</td>, <td>{<SimpleListMenu />}</td>)
table.push(<tr>{children}</tr>)
}
return table
}
render() {
return(
<table>
{this.createTable()}
</table>
)
}
}
另一个选择:
import React from 'react';
let id = 0;
function createData(option, type) {
id += 1;
return { id, option, type };
}
let rows = [
createData('Setting One', 'Private'),
createData('Setting Two', 'Public'),
createData('Setting Three', 'Group'),
createData('Setting Four', 'Private'),
];
export default class MyTable extends React.Component {
render() {
return(
<table>
{rows.map(row => (
<tr key={row.id}>
<td>{row.option}</td>
<td>{row.type}</td>
</tr>
))}
</table>
)
}
}
答案 3 :(得分:0)
private getRows(): any {
let rows: any[] = [];
if (this.state.data)
this.state.data.map((element) => {
rows.push(<tr>
<td style={{border: '1px solid black'}}>
{element.title}
</td>
</tr>);
});
return rows;
}
render( ) {
return <div>
<table style={{border: '1px solid black'}}>
{this.getRows()}
</table>
</div>
}
答案 4 :(得分:0)
从带有 array
的 function
和带有备用 bgColor 的行构建表:
function buildTable(arr){
const rows = arr.map((row,i) => {
return <tr style={{backgroundColor: i%2 ? '#F0FFF2':'white'}} key={i}>
<td>{row[0]}</td><td>{row[1]}</td>
</tr>
})
return <table><tbody>{rows}</tbody></table>
}
const data = [["FieldA", "aaa"],["FieldB", "bbb"],["FieldC", "ccc"]];
buildTable(data);