React中怎么动态加载路由,很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
引入必要的依赖
import React from 'react'
import { Router, Route, IndexRoute, hashHistory } from 'react-router'
接下来创建一个component函数
目的就是为了变为router的component实现异步加载。
// 异步按需加载component
function asyncComponent(getComponent) {
return class AsyncComponent extends React.Component {
static Component = null;
state = { Component: AsyncComponent.Component };
componentDidMount() {
if (!this.state.Component) {
getComponent().then(({default: Component}) => {
AsyncComponent.Component = Component
this.setState({ Component })
})
}
}
//组件将被卸载
componentWillUnmount(){
//重写组件的setState方法,直接返回空
this.setState = (state,callback)=>{
return;
};
}
render() {
const { Component } = this.state
if (Component) {
return <Component {...this.props} />
}
return null
}
}
}
在此说明componentWillUnmount钩子是为了解决Can only update a mounted or mounting component的这个问题,原因是当离开页面以后,组件已经被卸载,执行setState时无法找到渲染组件。
接下来实现本地文件路径的传入
function load(component) {
return import(`./routes/${component}`)
}
将已知地址路径传递到一个函数并把这个函数作为参数传递到 asyncComponent中这样asyncComponent就能接收到这个路由的地址了,然后我们要做的就是将这个asyncComponent函数带入到router中。
<Router history={hashHistory}>
<Route name="home" breadcrumbName="首页" path="/" component={MainLayout}>
<IndexRoute name="undefined" breadcrumbName="未定义" component={() => <div>未定义</div>}/>
<Route name="Development" breadcrumbName="施工中" path="Development" component={DevelopmentPage}/>
<Route breadcrumbName="个人助理" path="CustomerWorkTodo" component={({children}) => <div className="box">{children}</div>}>
<Route name="Agency" breadcrumbName="待办事项" path="Agency" component={asyncComponent(() => load('GlobalNotification/CustomerWorkAssistantTodo/CustomerAgencyMatter'))}/>
<Route name="Already" breadcrumbName="已办事项" path="Already" component={asyncComponent(() => load('GlobalNotification/CustomerWorkAssistantTodo/CustomerAlreadyMatter'))}/>
<Route name="SystemMessage" breadcrumbName="系统消息" path="SystemMessage/:data" component={asyncComponent(() => load('GlobalNotification/SystemMessage/SystemMessage'))}/>
<Route name="SystemMessagePer" breadcrumbName="系统消息详情" path="SystemMessagePer/:data" component={asyncComponent(() => load('GlobalNotification/SystemMessage/SystemMessagePer'))}/>
</Route>
</Router>
</Router>
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