React路由渲染方式与withRouter高阶组件及自定义导航组件应用详细介绍

<Route path="/home" component={Home} />
或
<Route path="/home" component={(router)=><Home {…router} />} />

import React, { Component } from 'react'
import { Route } from 'react-router-dom'
// 匹配成功后渲染的组件
import RenderCmp from './views/Render'
class App extends Component {
  render() {
    return (
      <div>
        {/*
          component
          类方式：
          1.对于规则匹配成的组件没有办法去写逻辑，会直接渲染
          2.规则匹配成功后，会给组件中的props自动映射对应的路由对象
          3.当前载体中的state更新,它不会重新创建
        */}
        <Route path="/" component={RenderCmp} />
        {/* 
          component
          函数方式：
          1.可以在规则匹配成功后，进行业务逻辑的判断来决定最终是否渲染
          2.规则匹配成功后，它需要你把回调函数中的路由对象，手动的通过props传给要渲染的组件
          3.当前的载体中的state如果,发生改变,则它对应匹配要渲染的组件会销毁并重新创建
          建议: component属性的回调函数的方式,不要在工作中使用,可以用 render来代替
        */}
        {/* <Route
          path="/"
          component={route => {
            if (true) {
              return <RenderCmp {...route} />
            }
            return <div>没有权限</div>
          }}
        /> */}
      </div>
    )
  }
}
export default App

<Route path="/home" render={<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->router=><Home {<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->…router} />} />

import React, { Component } from 'react'
import { Route } from 'react-router-dom'
// 匹配成功后渲染的组件
import RenderCmp from './views/Render'
class App extends Component {
  render() {
    return (
      <div>
        {/* 
          render渲染方式
          它有component类的优点也有component回调的优点,但没有component回调中的缺点
        */}
        <Route
          path="/"
          render={route => {
            if (true) {
              return <RenderCmp {...route} />
            }
            return <div>没有权限</div>
          }}
        />
      </div>
    )
  }
}
export default App

import React, { Component } from 'react'
import { Redirect, Route, Switch } from 'react-router-dom'
// 匹配成功后渲染的组件
import RenderCmp from './views/Render'
import Login from './views/Login'
class App extends Component {
  render() {
    return (
      <div>
        <Switch>
          <Route path="/login" component={Login} />
          <Route
            path="/render"
            render={route => {
              if (sessionStorage.getItem('uid')) {
                return <RenderCmp {...route} />
              }
              return <Redirect to="/login" />
            }}
          />
        </Switch>
      </div>
    )
  }
}
export default App

import React, { Component } from 'react'
class Login extends Component {
  render() {
    return (
      <div>
        <h3>用户登录</h3>
        <button
          onClick={() => {
            sessionStorage.setItem('uid', 1)
            this.props.history.push('/render')
          }}
        >
          登录一下
        </button>
      </div>
    )
  }
}
export default Login

// 全匹配
<Route path="/about" children={router =>{
	return <div>children渲染</div>
}} />
或
// 精确匹配
<Route path="/about" children={<About />} />

import React, { Component } from 'react'
import { Redirect, Route, Switch } from 'react-router-dom'
// 匹配成功后渲染的组件
import RenderCmp from './views/Render'
// import Login from './views/Login'
class App extends Component {
  render() {
    return (
      <div>
        {/* 
          children属性中传入jsx元素,则它会根据path路径来匹配规则,如果匹配成功则渲染,不会自动注入路由对象到props中
        */}
        {/* <Route path="/sdfsf" children={<RenderCmp />} /> */}
        
        {/* 
          children属性为一个函数,则它的渲染不会根据路由规则来匹配渲染,它默认都会渲染出来
          在此函数的形参中有一个路由对象,此对象中有一个match属性,如果当前访问的地址和path路径一致,则返回为对象,否则为null
          函数方式: 如果你当前的页面中有一些显示的元素它在任何的地址中都要显示,且还要根据是否是激活路由,而高亮出来,就可以用它
        */}
        <Route
          path="/home"
          children={route => {
            // console.log('match', route.match)
            // return <RenderCmp {...route} />
            // 手动添加规则：路径一致才渲染
            return route.match ? <RenderCmp {...route} /> : null
          }}
        />
      </div>
    )
  }
}
export default App

// 引入withRouter
import { withRouter} from 'react-router-dom'
// 执行一下withRouter
export default withRouter(Cmp)

import React, { Component } from 'react'
// withRouter 让非路由直接匹配渲染的组件中能得在this.props中得到路由对象
import { Redirect, Route, Switch, withRouter } from 'react-router-dom'
// 匹配成功后渲染的组件
// import RenderCmp from './views/Render'
import Home from './views/Home'
import Detail from './views/Detail'
// 装饰器写法
// @withRouter
class App extends Component {
  state = {
    num: 100
  }
  componentDidMount() {
    // 手动让第1次执行
    this.listenerRouter(this.props.location)
    // 监听路由变化则触发  第1次它只注册,不执行回调
    this.props.history.listen(this.listenerRouter)
  }
  listenerRouter = ({ pathname }) => {
    console.log('listener', pathname)
    // 只有登录直接访问,别的都要判断是否登录
    if(pathname!=='/login'){
      // 判断是否登录
      // if(xxx)
      // this.props.history.replace('/login')
      return;
    }
  }
  render() {
    // console.log('app', this.props)
    return (
      <div>
        <Switch>
          <Route path="/home" component={Home} />
          <Route path="/detail" component={Detail} />
        </Switch>
      </div>
    )
  }
}
// 对应装饰器写法
// export default App
export default withRouter(App)

import React, { Component } from 'react'
import Mylink from './components/Mylink'
import { Route, Switch } from 'react-router-dom'
import Home from './views/Home'
import About from './views/About'
class App extends Component {
  render() {
    return (
      <div className="app">
        <Mylink tag="h3" to="/home">
          home页面
        </Mylink>
        <Mylink tag="h3" to="/about">
          about页面
        </Mylink>
        <hr />
        {/* 路由规则 */}
        <Switch>
          <Route path="/home" component={Home} />
          <Route path="/about" component={About} />
        </Switch>
      </div>
    )
  }
}
export default App

// Fragment 它可以当作顶层元素来包裹子元素,但它不会编译成html元素
// Fragment 有简写,简写时,可以不需要导入Fragment组件 <></>
// import React, { Component, Fragment } from 'react'
import React, { Component } from 'react'
import { withRouter, Route } from 'react-router-dom'
import types from 'prop-types'
@withRouter
class Mylink extends Component {
  jumpUrl = () => {
    this.props.history.push(this.props.to)
  }
  render() {
    let { tag: Tag, children, to, activeClassName } = this.props
    return (
      <>
        <Route
          path={to}
          children={({ match }) => {
            // 高亮
            let className = match ? activeClassName : ''
            return (
              <Tag className={className} onClick={this.jumpUrl}>
                {children}
              </Tag>
            )
          }}
        />
      </>
    )
  }
}
// 字段限制
Mylink.propTypes = {
  to: types.string.isRequired,
  tag: types.string,
  activeClassName: types.string
}
// 默认值
Mylink.defaultProps = {
  tag: 'a',
  activeClassName: 'active'
}
export default Mylink