vite2 + vue3实现curd（二）：路由跳转

前言

• 之前参考这篇博客实现的路由跳转，是侧边栏开启路由
  

• 但是在当前项目中，需先让用户登录注册才进入控制台页面，所以注册、登录页面也使用路由，我们不能让注册登录页面显示到控制台的显示区

• 解决方案：将路由出口放到根组件App.vue中，注册页面、登录页面、控制台页面作为二级组件，将其他组件作为三级组件引入控制台页面，点击侧边栏切换不同的三级组件

• 参考1

• 参考2

• 预期效果

点击查看详情

• 访问根路径，跳转到登录页面，点击去注册跳转到注册页面
  
• 点击去登录，跳转到登录页面
  
• 访问控制台页面，默认显示欢迎页面
  
• 之后点击侧边栏，右侧显示不同的组件
  

开发步骤

• 配置路由

import {createRouter, createWebHashHistory} from 'vue-router';
import userRegister from "../components/UserRegister.vue";
import userLogin from "../components/UserLogin.vue";
import consoleManage from "../components/ConsoleManage.vue";

const routes = [
    { path: "/", redirect: '/userLogin' },
    { path: "/userLogin", component: userLogin },
    { path: '/userRegister', component: userRegister },
    { path: '/consoleManage', component: consoleManage }
]
export default  createRouter({
    // 指定路由的模式
    history: createWebHashHistory(),
    routes 
})

• 新建子组件
  

• 引入所需的子组件
  

• 切换子组件业务逻辑：点击事件，点击后传入参数，根据传入的参数切换不同的子组件

<template>
<el-menu-item index="2-1" @click="show(2)" :class="index===2? 'active':''">查找用户</el-menu-item>
<el-menu-item index="2-2" @click="show(3)" :class="index===3? 'active':''">新增用户</el-menu-item>
<el-menu-item index="2-3" @click='show(4)' :class="index===4? 'active':''">删除用户</el-menu-item>
</template>

<script lang="ts">
import Welcome from '../view/welcome/Welcome.vue'
import UserManage from '../view/user/UserManage.vue'
import AddUser from '../view/user/AddUser.vue'
import UpdateUser from '../view/user/UpdateUser.vue'
import BookManage from '../view/book/BookManage.vue'
import ListManage from '../view/list/ListManage.vue'
export default {
  components: { Welcome, UserManage, AddUser, UpdateUser, BookManage, ListManage },
  data () {
    return {
      // 控制切换按钮后按钮改变样式
      index: 1,
      // 控制子组件显示
      comp: 'Welcome',
      // 控制点击按钮后子组件显示，再次点击隐藏
      isShow: true
    }
  },
  methods: {
    show (value:number) {
      console.log("value:" + value);
      if (this.index === value) {
        this.index = 0
        this.isShow = !this.isShow
      } else {
        this.index = value
        this.isShow = true
      }
      if (value === 1) this.comp = 'Welcome'
      if (value === 2) this.comp = 'UserManage'
      if (value === 3) this.comp = 'AddUser'
      if (value === 4) this.comp = 'UpdateUser'
      if (value === 5) this.comp = 'BookManage'
      if (value === 6) this.comp = 'ListManage'
    }
  }
}
</script>

<style scoped>
</style>

• 完整代码

点击查看详情

<template>
    <div class="common-layout">
    <el-container>
      <el-header>后台管理系统</el-header>
      <el-container>
        <el-aside width="200px">
            <!-- 侧边栏开始-->
            <el-row class="tac">
                <el-col :span="12">
                <el-menu
                    class="el-menu-vertical-demo"
                    :default-openeds="['1']"
                    :default-active="['1-1']"
                    active-text-color="#409EFF"
                >
                    <el-sub-menu index="1">
                        <template #title>
                            <el-icon><location /></el-icon>
                            <span>欢迎使用</span>
                        </template>
                            <el-menu-item index="1-1" @click="show(1)" :class="index===1? 'active':''">hello!</el-menu-item>
                    </el-sub-menu>
                    <el-sub-menu index="2">
                        <template #title>
                            <el-icon><location /></el-icon>
                            <span>用户管理</span>
                        </template>
                            <el-menu-item index="2-1" @click="show(2)" :class="index===2? 'active':''">查找用户</el-menu-item>
                            <el-menu-item index="2-2" @click="show(3)" :class="index===3? 'active':''">新增用户</el-menu-item>
                            <el-menu-item index="2-3" @click='show(4)' :class="index===4? 'active':''">删除用户</el-menu-item>
                    </el-sub-menu>
                    <el-sub-menu index="3">
                        <template #title>
                            <el-icon><location /></el-icon>
                            <span>书籍管理</span>
                        </template>
                            <el-menu-item index="3-1" @click='show(5)' :class="index===5? 'active':''">查找书籍</el-menu-item>
                            <el-menu-item index="3-2">新增书籍</el-menu-item>
                            <el-menu-item index="3-3">删除书籍</el-menu-item>
                    </el-sub-menu>
                    <el-sub-menu index="4">
                        <template #title>
                            <el-icon><location /></el-icon>
                            <span>全局管理</span>
                        </template>
                            <el-menu-item index="4-1" @click='show(6)' :class="index===6? 'active':''">查找用户</el-menu-item>
                            <el-menu-item index="4-2">新增用户</el-menu-item>
                            <el-menu-item index="4-3">删除用户</el-menu-item>
                    </el-sub-menu>
                    <el-sub-menu index="5">
                        <template #title>
                            <el-icon><location /></el-icon>
                            <span>其他需求</span>
                        </template>
                            <el-menu-item index="4-1">查找用户</el-menu-item>
                            <el-menu-item index="4-2">新增用户</el-menu-item>
                            <el-menu-item index="4-3">删除用户</el-menu-item>
                    </el-sub-menu>
                </el-menu>
                </el-col>
            </el-row>
            <!-- 侧边栏结束-->
        </el-aside>
        <el-main>
            <!-- 显示区开始 -->
            <keep-alive>
              <component :is="comp" v-show="isShow"></component>
            </keep-alive>
            <!-- 显示区结束 -->
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script lang="ts">
import Welcome from '../view/welcome/Welcome.vue'
import UserManage from '../view/user/UserManage.vue'
import AddUser from '../view/user/AddUser.vue'
import UpdateUser from '../view/user/UpdateUser.vue'
import BookManage from '../view/book/BookManage.vue'
import ListManage from '../view/list/ListManage.vue'
export default {
  components: { Welcome, UserManage, AddUser, UpdateUser, BookManage, ListManage },
  data () {
    return {
      // 控制切换按钮后按钮改变样式
      index: 1,
      // 控制子组件显示
      comp: 'Welcome',
      // 控制点击按钮后子组件显示，再次点击隐藏
      isShow: true
    }
  },
  methods: {
    show (value:number) {
      console.log("value:" + value);
      if (this.index === value) {
        this.index = 0
        this.isShow = !this.isShow
      } else {
        this.index = value
        this.isShow = true
      }
      if (value === 1) this.comp = 'Welcome'
      if (value === 2) this.comp = 'UserManage'
      if (value === 3) this.comp = 'AddUser'
      if (value === 4) this.comp = 'UpdateUser'
      if (value === 5) this.comp = 'BookManage'
      if (value === 6) this.comp = 'ListManage'
    }
  }
}
</script>

<style scoped>
.el-header,
.el-footer {
  background-color: #b3c0d1;
  color: var(--el-text-color-primary);
  text-align: center;
  line-height: 60px;
  background-color: #85d3f7a1;
}

.el-aside {
  background-color: #d3dce6;
  color: var(--el-text-color-primary);
  text-align: center;
  line-height: 730px;
  height: 730px;
  background-color: #85d3f7a1;
}

.el-main {
  background-color: #e9eef3;
  color: var(--el-text-color-primary);
  text-align: center;
  line-height: 160px;
  height: 730px;
}

body > .el-container {
  margin-bottom: 40px;
}

.el-container:nth-child(5) .el-aside,
.el-container:nth-child(6) .el-aside {
  line-height: 260px;
}

.el-container:nth-child(7) .el-aside {
  line-height: 320px;
}

.el-menu-vertical-demo{
    width: 200px;
    background-color: #85d3f7a1;
}

.tac{
    width: 100%;
    height: 100%;
}

.one {
    height: 300px;
    background: red;
  }
.two {
    height: 300px;
    background: yellow;
}
.three {
    height: 300px;
    background: blue;
}

</style>

补充

• 在实现子组件切换时报错：Cannot use 'in' operator to search for
• 错误原因：

# 多了
@open="handleOpen"
@close="handleClose"

# 少了
index="1-1"