"componentWillReceiveProps"
"shouldComponentUpdate"
"componentWillUpdate"
"render"
"componentDidUpdate"使用这些生命周期钩子可以监听到路由相同，参数不同的变化，但是监听不到完全不相同的url的变化。即使路由不同，componentDidMount组件内容所更新的东西变了，但是代码变了，页面没有变，找到了一种方法。withRouter
参考：https://reacttraining.com/react-router/web/api/withRouter
import React from 'react'
import PropTypes from 'prop-types'
import { withRouter } from 'react-router'// A simple component that shows the pathname of the current location
class ShowTheLocation extends React.Component {static propTypes = {match: PropTypes.object.isRequired,location: PropTypes.object.isRequired,history: PropTypes.object.isRequired}render() {const { match, location, history } = this.propsreturn (<div>You are now at {location.pathname}</div>
)}
}export default withRouter(ShowTheLocation) //组件名称，导出该组件，保证在最外边
更多专业前端知识，请上 【猿2048】www.mk2048.com
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