VUE3【学习四】router路由跳转及轻量级vant组件的安装及应用，轮播图制作

一、我这边scripts的运行命令是dev，所以npm run dev，打开访问http://localhost:300/就能顺利访问

 二、安装路由npm i vue-router@next

在src文件夹下新建router/index.js文件和views/Home.vue文件

//router/index.js页面代码
import { createRouter, createWebHashHistory } from 'vue-router'
const router = createRouter({
    history: createWebHashHistory(), // hash模式：createWebHashHistory，history模式：createWebHistory
    routes: [
        {
            path: '/',
            redirect: '/home'
          },
          {
            path: '/home',
            name: 'home',
            component: () => import('../views/Home.vue'),
            meta: {
              index: 1
            }
          }
    ]
})

export default router

//iews/Home.vue页面代码
<template>
    我是首页代码
</template>
<script> 

export default {
    name: 'home',
    setup() {
        
    },
}
</script>

App.vue页面引入路由

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>

<script> 

export default {
  name: 'App' 
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

 在main.js文件中引入import router from './router'和app.use(router)，如下图

 启动项目来验证下，成功跳转到首页

注意：路由如果使用@引入的话v会报错

需要在vite.config.js增加代码

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import path from 'path'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  resolve: {
    alias: {
      '~': path.resolve(__dirname, './'),
      '@': path.resolve(__dirname, 'src')
    }
  }
})

三、引入轻量级vant组件npm install vant -D，官网地址：Vant 3 - Mobile UI Components built on Vue

 在main.js中引入

import { createApp } from 'vue'
import App from './App.vue'
import router from './router' //路由引入
import { Swipe, SwipeItem } from 'vant';  //vant按需引入
import 'vant/lib/index.css'; // vant样式

const app = createApp(App) // 创建实例
app.use(Swipe)
    .use(SwipeItem)

app.use(router)
app.mount('#app')

 home.js页面去调用

<template>
    <van-swipe class="my-swipe" :autoplay="3000" indicator-color="white">
        <van-swipe-item>1</van-swipe-item>
        <van-swipe-item>2</van-swipe-item>
        <van-swipe-item>3</van-swipe-item>
        <van-swipe-item>4</van-swipe-item>
    </van-swipe>
</template>
<script> 

export default {
    name: 'home',
    setup() {
        
    },
}
</script>
<style>
  .my-swipe .van-swipe-item {
    color: #fff;
    font-size: 20px;
    line-height: 150px;
    text-align: center;
    background-color: #39a9ed;
  }
</style>

考虑到可能会有很多页面用到这轮播图，所以我们把它做成组件来用，在components文件夹下新建Swiper.vue，Home.vue页面去引入，修改Home.vue页面

<template>
<header>
    <swiper :list='swiperList'></swiper>
</header>

</template>
<script> 
import {reactive ,toRefs} from 'vue'
import swiper from '@/components/Swiper'
export default {
    name: 'home',
    components:{
        swiper
    },
    setup() {
        const state = reactive({
            swiperList:[
                {headerURL:'https://newbee-mall.oss-cn-beijing.aliyuncs.com/images/banner-p50-pocket.png'}
            ]
        })
        return {
            ...toRefs(state)
        }
    },
}
</script>
<style>
  .my-swipe .van-swipe-item {
    color: #fff;
    font-size: 20px;
    line-height: 150px;
    text-align: center;
    background-color: #39a9ed;
  }
</style>

Swiper.vue页面

运行后可以看到图片太大了

我们得给图片设置宽高

报错了，在这我们引入sass样式 

 正确代码如下：

<template>
    <van-swipe class="my-swipe" :autoplay="3000" indicator-color="white">
        <van-swipe-item v-for="(item,index) in list" :key="index">
            <img :src="item.headerURL" alt="">
        </van-swipe-item>
    </van-swipe>
</template>
<script>

export default {
    props:{
        list:Array
    },
    setup() {
        
    },
}
</script>

<style scoped lang='scss'>
  .my-swipe {
    img {
      width: 100%;
      height: 100%;
    }
  }
</style>

运行命令： npm add sass -D

 运行项目