提示:之前我们已经对vue中的路由做了简单的了解,本文将对vue的路由做更深层次的学习
文章目录
前言
提示:这里可以添加本文要记录的大概内容:
之前我们已经对vue中的路由做了简单的了解,本文将对vue的路由做更深层次的学习
提示:以下是本篇文章正文内容
一、 路由的props配置
1.1 使用
src/pages/Message.vue:
<template>
<div>
<ul>
<li v-for="m in messageList" :key="m.id">
<router-link :to="{
name:'xiangqing',
params:{
id:m.id,
title:m.title
}
}">
{{m.title}}
</router-link>
</li>
</ul>
<hr/>
<router-view></router-view>
</div>
</template>
<script>
export default {
name:'News',
data(){
return{
messageList:[
{id:'001',title:'消息001'},
{id:'002',title:'消息002'},
{id:'003',title:'消息003'}
]
}
}
}
</script>
src/router/index.js:
//该文件专门用于创建整个应用的路由器
import VueRouter from "vue-router";
//引入组件
import Home from '../pages/Home'
import About from '../pages/About'
import News from '../pages/News'
import Message from '../pages/Message'
import Detail from '../pages/Detail'
//创建并暴露一个路由器
export default new VueRouter({
routes:[
{
path:'/about',
component:About
},
{
path:'/home',
component:Home,
children:[
{
path:'news',
component:News
},
{
path:'message',
component:Message,
children:[
{
name:'xiangqing',
path:'detail/:id/:title',
component:Detail,
//props的第一种写法,值为对象,该对象中的所有key-value都会以props的形式传给Detail组件。
// props:{a:1,b:'hello'}
//props的第二种写法,值为布尔值,若布尔值为真,就会把该路由组件收到的所有params参数,以props的形式传给Detail组件。
// props:true
//props的第三种写法,值为函数
props($route){
return {
id:$route.params.id,
title:$route.params.title,
}
}
}
]
}
]
}
]
})
src/pages/Detail.vue:
<template>
<ul>
<li>消息编号:{{id}}</li>
<li>消息标题:{{title}}</li>
</ul>
</template>
<script>
export default {
name:'Detail',
props:['id','title']
}
</script>
1.2 总结
- 作用:让路由组件更方便的收到参数
{
name:'xiangqing',
path:'detail/:id',
component:Detail,
//第一种写法:props值为对象,该对象中所有的key-value的组合最终都会通过props传给Detail组件
// props:{a:900}
//第二种写法:props值为布尔值,布尔值为true,则把路由收到的所有params参数通过props传给Detail组件
// props:true
//第三种写法:props值为函数,该函数返回的对象中每一组key-value都会通过props传给Detail组件
props(route){
return {
id:route.query.id,
title:route.query.title
}
}
}
二、 路由跳转的replace方法
src/pages/Home.vue:
<template>
<div>
<h2>Home组件内容</h2>
<div>
<ul class="nav nav-tabs">
<li>
<router-link replace class="list-group-item" active-class="active" to="/home/news">News</router-link>
</li>
<li>
<router-link replace class="list-group-item" active-class="active" to="/home/message">Message</router-link>
</li>
</ul>
<router-view></router-view>
</div>
</div>
</template>
<script>
export default {
name:'Home'
}
</script>
总结:
1、作用:控制路由跳转时操作浏览器历史记录的模式
2、浏览器的历史记录有两种写入方式:
push
和
replace
,其中
push
是追加历史记录,
replace
是替换当前记录。路由跳转时候默认为
push
方式
3、开启
replace
模式:
<router-link replace ...>News</router-link>
三、编程式路由导航
src/components/Banner.vue:
<template>
<div class="col-xs-offset-2 col-xs-8">
<div class="page-header">
<h2>Vue Router Demo</h2>
<button @click="back">后退</button>
<button @click="forward">前进</button>
<button @click="test">测试一下go</button>
</div>
</div>
</template>
<script>
export default {
name:'Banner',
methods:{
back(){
this.$router.back()
},
forward(){
this.$router.forward()
},
test(){
this.$router.go(3)
}
},
}
</script>
src/pages/Message.vue:
<template>
<div>
<ul>
<li v-for="m in messageList" :key="m.id">
<router-link :to="{
name:'xiangqing',
params:{
id:m.id,
title:m.title
}
}">
{{m.title}}
</router-link>
<button @click="showPush(m)">push查看</button>
<button @click="showReplace(m)">replace查看</button>
</li>
</ul>
<hr/>
<router-view></router-view>
</div>
</template>
<script>
export default {
name:'News',
data(){
return{
messageList:[
{id:'001',title:'消息001'},
{id:'002',title:'消息002'},
{id:'003',title:'消息003'}
]
}
},
methods:{
showPush(m){
this.$router.push({
name:'xiangqing',
query:{
id:m.id,
title:m.title
}
})
},
showReplace(m){
this.$router.replace({
name:'xiangqing',
query:{
id:m.id,
title:m.title
}
})
}
}
}
</script>
src/router/index.js:
//该文件专门用于创建整个应用的路由器
import VueRouter from "vue-router";
//引入组件
import Home from '../pages/Home'
import About from '../pages/About'
import News from '../pages/News'
import Message from '../pages/Message'
import Detail from '../pages/Detail'
//创建并暴露一个路由器
export default new VueRouter({
routes:[
{
path:'/about',
component:About
},
{
path:'/home',
component:Home,
children:[
{
path:'news',
component:News
},
{
path:'message',
component:Message,
children:[
{
name:'xiangqing',
path:'detail',
component:Detail,
props($route){
return {
id:$route.query.id,
title:$route.query.title,
}
}
}
]
}
]
}
]
})
src/pages/Detail.vue:
<template>
<ul>
<li>消息编号:{{id}}</li>
<li>消息标题:{{title}}</li>
</ul>
</template>
<script>
export default {
name:'Detail',
props:['id','title']
}
</script>
效果:
总结:
1、作用:不借助
<router-link>
实现路由跳转,让路由跳转更加灵活
2、具体编码:
this.$router.push({
name:'xiangqing',
params:{
id:xxx,
title:xxx
}
})
this.$router.replace({
name:'xiangqing',
params:{
id:xxx,
title:xxx
}
})
this.$router.forward() //前进
this.$router.back() //后退
this.$router.go() //可前进也可后退
四、缓存路由组件
src/pages/News.vue:
<template>
<ul>
<li>news001 <input type="text"></li>
<li>news002 <input type="text"></li>
<li>news003 <input type="text"></li>
</ul>
</template>
<script>
export default {
name:'News'
}
</script>
src/pages/Home.vue:
<template>
<div>
<h2>Home组件内容</h2>
<div>
<ul class="nav nav-tabs">
<li>
<router-link replace class="list-group-item" active-class="active" to="/home/news">News</router-link>
</li>
<li>
<router-link replace class="list-group-item" active-class="active" to="/home/message">Message</router-link>
</li>
</ul>
<keep-alive include="News">
<router-view></router-view>
</keep-alive>
</div>
</div>
</template>
<script>
export default {
name:'Home'
}
</script>
效果:
总结:
1、作用:让不展示的路由组件保持挂载,不被销毁
2、具体编码:
//缓存一个路由组件
<keep-alive include="News"> //include中写想要缓存的组件名,不写表示全部缓存
<router-view></router-view>
</keep-alive>
//缓存多个路由组件
<keep-alive :include="['News','Message']">
<router-view></router-view>
</keep-alive>
五、activated和deactivated
src/pages/News.vue
:
<template>
<ul>
<li :style="{opacity}">欢迎学习vue</li>
<li>news001 <input type="text"></li>
<li>news002 <input type="text"></li>
<li>news003 <input type="text"></li>
</ul>
</template>
<script>
export default {
name:'News',
data(){
return{
opacity:1
}
},
activated(){
console.log('News组件被激活了')
this.timer = setInterval(() => {
this.opacity -= 0.01
if(this.opacity <= 0) this.opacity = 1
},16)
},
deactivated(){
console.log('News组件失活了')
clearInterval(this.timer)
}
}
</script>
效果:
总结:
1、activated和deactivated是路由组件所独有的两个钩子,用于捕获路由组件的激活状态
2、具体使用:
activated路由组件被激活时触发
deactivated路由组件失活时触发
六、 路由守卫
6.1 全局路由守卫
src/router/index.js:
//该文件专门用于创建整个应用的路由器
import VueRouter from "vue-router";
//引入组件
import Home from '../pages/Home'
import About from '../pages/About'
import News from '../pages/News'
import Message from '../pages/Message'
import Detail from '../pages/Detail'
//创建一个路由器
const router = new VueRouter({
routes:[
{
name:'guanyv',
path:'/about',
component:About,
meta:{title:'关于'}
},
{
name:'zhuye',
path:'/home',
component:Home,
meta:{title:'主页'},
children:[
{
name:'xinwen',
path:'news',
component:News,
meta:{isAuth:true,title:'新闻'}
},
{
name:'xiaoxi',
path:'message',
component:Message,
meta:{isAuth:true,title:'消息'},
children:[
{
name:'xiangqing',
path:'detail',
component:Detail,
meta:{isAuth:true,title:'详情'},
props($route){
return {
id:$route.query.id,
title:$route.query.title,
}
}
}
]
}
]
}
]
})
//全局前置路由守卫————初始化的时候、每次路由切换之前被调用
router.beforeEach((to,from,next) => {
console.log('前置路由守卫',to,from)
if(to.meta.isAuth){
if(localStorage.getItem('school')==='atguigu'){
next()
}else{
alert('学校名不对,无权限查看!')
}
}else{
next()
}
})
//全局后置路由守卫————初始化的时候被调用、每次路由切换之后被调用
router.afterEach((to,from)=>{
console.log('后置路由守卫',to,from)
document.title = to.meta.title || '硅谷系统'
})
//导出路由器
export default router
6.2 独享路由守卫
src/router/index.js:
//该文件专门用于创建整个应用的路由器
import VueRouter from "vue-router";
//引入组件
import Home from '../pages/Home'
import About from '../pages/About'
import News from '../pages/News'
import Message from '../pages/Message'
import Detail from '../pages/Detail'
//创建一个路由器
const router = new VueRouter({
routes:[
{
name:'guanyv',
path:'/about',
component:About,
meta:{title:'关于'}
},
{
name:'zhuye',
path:'/home',
component:Home,
meta:{title:'主页'},
children:[
{
name:'xinwen',
path:'news',
component:News,
meta:{title:'新闻'},
//独享守卫,特定路由切换之后被调用
beforeEnter(to,from,next){
console.log('独享路由守卫',to,from)
if(localStorage.getItem('school') === 'atguigu'){
next()
}else{
alert('暂无权限查看')
}
}
},
{
name:'xiaoxi',
path:'message',
component:Message,
meta:{title:'消息'},
children:[
{
name:'xiangqing',
path:'detail',
component:Detail,
meta:{title:'详情'},
props($route){
return {
id:$route.query.id,
title:$route.query.title,
}
}
}
]
}
]
}
]
})
//全局后置路由守卫————初始化的时候被调用、每次路由切换之后被调用
router.afterEach((to,from)=>{
console.log('后置路由守卫',to,from)
document.title = to.meta.title || '硅谷系统'
})
//导出路由器
export default router
6.3 组件内路由守卫
src/pages/About.vue:
<template>
<h2>我是About组件的内容</h2>
</template>
<script>
export default {
name:'About',
//通过路由规则,离开该组件时被调用
beforeRouteEnter (to, from, next) {
console.log('About--beforeRouteEnter',to,from)
if(localStorage.getItem('school')==='atguigu'){
next()
}else{
alert('学校名不对,无权限查看!')
}
},
//通过路由规则,离开该组件时被调用
beforeRouteLeave (to, from, next) {
console.log('About--beforeRouteLeave',to,from)
next()
}
}
</script>
总结:
1、作用:对路由进行权限控制
2、分类:全局守卫、独享守卫、组件内守卫
3、全局守卫:
//全局前置守卫:初始化时执行、每次路由切换前执行
router.beforeEach((to,from,next)=>{
console.log('beforeEach',to,from)
if(to.meta.isAuth){ //判断当前路由是否需要进行权限控制
if(localStorage.getItem('school') === 'atguigu'){ //权限控制的具体规则
next() //放行
}else{
alert('暂无权限查看')
}
}else{
next() //放行
}
})
//全局后置守卫:初始化时执行、每次路由切换后执行
router.afterEach((to,from) => {
console.log('afterEach',to,from)
if(to.meta.title){
document.title = to.meta.title //修改网页的title
}else{
document.title = 'vue_test'
}
})
4、独享守卫:
beforeEnter(to,from,next){
console.log('beforeEnter',to,from)
if(localStorage.getItem('school') === 'atguigu'){
next()
}else{
alert('暂无权限查看')
}
}
5、组件内守卫:
//进入守卫:通过路由规则,进入该组件时被调用
beforeRouteEnter (to, from, next) {...},
//离开守卫:通过路由规则,离开该组件时被调用
beforeRouteLeave (to, from, next) {...},
七、路由器的两种工作模式
1、对于一个url来说,什么是hash值?—— #及其后面的内容就是hash值
2、hash值不会包含在 HTTP 请求中,即:hash值不会带给服务器
3、hash模式:
1、地址中永远带着#号,不美观
2、若以后将地址通过第三方手机app分享,若app校验严格,则地址会被标记为不合法
3、兼容性较好
4、history模式:
1、地址干净,美观
2、兼容性和hash模式相比略差
3、应用部署上线时需要后端人员支持,解决刷新页面服务端404的问题