访问不同url, 展示不同的组件
安装React路由：命令行中执行npm install react-router-dom --save(注意此处的版本为npm install react-router-dom@4.3.1 --save)
两个js文件，分别为list.js和newButton.js,要实现访问localhost:3000/button的时候就显示button.js；访问localhost:3000/list的时候就显示list.js。代码如下：
list.js
import React, {Component} from "react";
import {List} from 'antd';
const data = [
'aaa',
'bbb',
'ccc',
'ddd'
]
class List extends Component {
render() {
return (
<List style={{marginLeft: 20,
marginTop: 20,
marginRight: 20}}
header={<div>Header</div>}
footer={<div>Footer</div>}
bordered
dataSource={data}
renderItem={item=>(<List.Item>{item}</List.Item>)}
/>
)
}
}
export default List
newButton.js
import React, {Component} from "react";
import {List} from 'antd';
const data = [
'aaa',
'bbb',
'ccc',
'ddd'
]
class NewList extends Component {
render() {
return (
<List style={{marginLeft: 20,
marginTop: 20,
marginRight: 20}}
header={<div>Header</div>}
footer={<div>Footer</div>}
bordered
dataSource={data}
renderItem={item=>(<List.Item>{item}</List.Item>)}
/>
)
}
}
export default NewList
在index.js中使用router
1)引入路由：import { BrowserRouter, Route, Link } from 'react-router-dom';
2)渲染BrowserRouter组件,其中包含一条条的路由
class Entry extends Component {
render() {
return (
<BrowserRouter>
<div>
<Route path='/list' component={NewList}/>
<Route path='/button' component={NewButton}/>
</div>
</BrowserRouter>
)
}
}
3）浏览器中输入localhost:3000后，什么后没显示出来，因为此时没有匹配的路由
4）根据路由的配置，浏览器中输入：localhost:3000/list就会显示newList组件
输入：localhost:3000/button就会显示newButton组件
注：BrowserRoute表示定义一个路由，Route表示一个路由项，
5）如想通过点击newButton里的按钮后跳转到列表页，需要用到Link（使用React路由后，就不能使用a标签进行页面跳转，需要借助Link标签完成路由的跳转）
步骤：在newButton中引入Link后用Link标签跳转
newButton.js
import React, {Component, Fragment} from "react";
import { Link } from "react-router-dom";
import {Button} from 'antd';
class NewButton extends Component {
render() {
return (
<Link to='/list'>
<Button type="primary">按钮</Button>
</Link>
)
}
}
export default NewButton;
6)跳转页面的过程中，携带参数，如何获取参数，如
class NewButton extends Component {
render() {
return (
<Link to='/list/123'>
<Button type="primary">按钮</Button>
</Link>
)
}
}
解决方式：在index.js配置路由部分，给list地址后加一个变量,表示传过来的值为变量id的值
<Route path='/list/:id' component={<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->NewList}/>之后在newList组件中打印出console.log(this.props)
可看到params里有变量id的值为123
完整代码如下：
index.js中
import React, {Component}from 'react';
import ReactDOM from 'react-dom';
import { BrowserRouter, Route } from 'react-router-dom';
import 'antd/dist/antd.css';
import NewList from './newList'
import NewButton from './newButton'
class Entry extends Component {
render() {
return (
<BrowserRouter>
<div>
<Route path='/list/:id' component={NewList}/>
<Route path='/button' component={NewButton}/>
</div>
</BrowserRouter>
)
}
}
// 将内容挂载到页面上
ReactDOM.render(<Entry />, document.getElementById('root'));
newList.js中
import React, {Component} from "react";
import {List} from 'antd';
const data = [
'aaa',
'bbb',
'ccc',
'ddd'
]
class NewList extends Component {
render() {
console.log(this.props)
return (
<List style={{marginLeft: 20,
marginTop: 20,
marginRight: 20}}
header={<div>Header</div>}
footer={<div>Footer</div>}
bordered
dataSource={data}
renderItem={item=>(<List.Item>{item}</List.Item>)}
/>
)
}
}
export default NewList
newButton.js中
import React, {Component} from "react";
import { Link } from "react-router-dom";
import {Button} from 'antd';
class NewButton extends Component {
render() {
return (
<Link to='/list/123'>
<Button type="primary">按钮</Button>
</Link>
)
}
}
export default NewButton;
