vue学习记录 coderwhy d9

Posted 2022-12-10 Kooklen_xh

$this.router = router

$this,route是当前处于活跃的路由

观察者模式。一对多，一个是改了的data，多是更新数据
导航守卫

      path:'/About',
      component: About,
      beforeEnter:(to,from,next)=>
        console.log('About beforeEnter')
      

导航守卫配置：

beforeRouteEnter(to,from,next)
    // document.title = to.meta
    next(false)
  

import Vue from 'vue'
import Router from 'vue-router'
// import HelloWorld from '@/components/HelloWorld'
// import Home from "../components/Home";
// import About from "../components/About";
// import User from "../components/User";
const Home=()=>import('../components/Home');
const About=()=>import('../components/About');
const User=()=>import('../components/User');
const HomeNews=()=>import('../components/HomeNews');
const HomeMessage=()=>import('../components/HomeMessage');

// const HelloWorld=()=>import('../components/HelloWorld');

Vue.use(Router)

const routes= [
    
      path:'',
      redirect: '/Home'
    ,
    
      path: '/Home',
      component: Home,
      meta:"Home",
      children:[
        path:'news',
        component:HomeNews,
        meta:"news",

      ,
        path:'message',
        component:HomeMessage,
        meta:"message",
      ]
    ,
    
      path:'/About',
      component: About,
      meta:"About",
      beforeEnter:(to,from,next)=>
        console.log('About beforeEnter')
         next()
      
    ,
      path: '/User/:userId',
      component: User
    
  ]
  // mode:'history'

const router = new Router(
  routes,
  mode:'history'

)

router.beforeEach((to,from,next)=>
  document.title = to.meta;
  next()
)

export default router;

官方文档

<keep-alive><router-view></router-view>
    </keep-alive>

tabbar

<template>
  <div id="tab-bar">
    <div class="tab-bar-item">首页</div>
    <div class="tab-bar-item">分类</div>
    <div class="tab-bar-item">购物车</div>
    <div class="tab-bar-item">我的</div>
  </div>
</template>

<script>
export default 
  name: "TabBar"

</script>

<style scoped>
*
  padding: 0;
  margin: 0;

#tab-bar
  display: flex;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: 0px -1px 1px rgba(100,100,100,0.2);

.tab-bar-item
  flex: 1;
  text-align: center;
  height: 49px;
  background-color: #f6f6f6;


</style>

App.vue

<template>
  <div id="app">
    <tab-bar>
      <tab-bar-item>
        <img slot="item-icon" src="./assets/img/tabbar/indexactive.png" height="20" width="20">
        <div slot="item-text">主页</div>
      </tab-bar-item>
      <tab-bar-item><img slot="item-icon" src="./assets/img/tabbar/Category2.png" height="20" width="20">
        <div slot="item-text">分类</div>
      </tab-bar-item>
      <tab-bar-item><img slot="item-icon" src="./assets/img/tabbar/shop-cart-.png" height="20" width="20">
        <div slot="item-text">购物车</div></tab-bar-item>
      <tab-bar-item><img slot="item-icon" src="./assets/img/tabbar/Profile_1.png" height="20" width="20">
        <div slot="item-text">我的</div></tab-bar-item>
    </tab-bar>
  </div>

</template>

<script>
import TabBar from "./components/tabbar/TabBar";
import TabBarItem from "./components/tabbar/TabBarItem";
export default 
  name: 'App',
  components:
    TabBar,
    TabBarItem
  

</script>

<style >
</style>

tabbaritem.vue

<template>
  <div class="tab-bar-item">
    <slot name="item-icon"></slot>
    <slot name="item-text"></slot>
  </div>
</template>

<script>
export default 
  name: "TabBarItem"

</script>

<style scoped>
*
  padding: 0;
  margin: 0;

.tab-bar
  height: 49px;
  display: flex;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: 0px -1px 1px rgba(100,100,100,0.2);

.tab-bar-item
  flex: 1;
  text-align: center;
  height: 49px;
  background-color: #f6f6f6;
  font-size: 14px;
  margin-top: 3px;
  vertical-align: middle;


</style>

tabbar.vue

<template>
  <div id="tab-bar">
    <slot></slot> </div>
</template>

<script>
export default 
  name: "TabBar"

</script>

<style scoped>

#tab-bar
  height: 49px;
  display: flex;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: 0px -1px 1px rgba(100,100,100,0.2);


</style>