SPA项目开发之tab页实现

实现思路及细节

1、利用前面博客所讲的Vuex的知识；定义几个变量

Options：存放tab页对象的容器（主要是路由路径以及tab页的名字）

activeIndex：被激活的tab页路由路径

showName：tab页的标题

Role：用来区分是否是因为左侧菜单被点击造成的路由路径发生改变；

是：pass；不是：nopass

2、左侧导航菜单绑定点击事件

将被点击的菜单名称存放到Vuex中，供路由路径变化监听时，tab页标题显示；

标记一下role为pass，到时新增tab页的时候需要作为判断依据

3、右侧对tab页进行操作

Tab页的点击（切换到被点击的tab页完成路由跳转；标记一下role为nopass，到时新增tab页的时候需要作为判断依据；）；

Tab页的移除（删除指定的tab页对象；如果删除的tab页对象处于选中状态，需要将选中状态的下标移到最后一个，因为原来选中的tab页已经删除了；标记一下role为nopass，到时新增tab页的时候需要作为判断依据；））

4、监听路由路径变化

点亮已经存在的tab页（Vuex中showName与option中的哪个tab页对象的name相同，那么就点亮哪一个）

新增tab页（首先路由路径的变化是因为左侧栏的点击，其次要option中不存在的tab页对象）

效果图

State.js

export default{
 
    resturantName: '飞歌餐馆',
    jwt:'',
    options: [],//存放tab页的容器
    activeIndex: '',//激活的tab页路由路径
    showName:'show',//tab页的标题
    role:""//用来区分是否是因为左侧菜单被点击造成的路由路径发生改变，是：pass；不是：nopass
}

Mutations.js

export default {
    setResturantName: (state, payload) => {
        state.resturantName = payload.resturantName;
    },
    setJwt: (state, payload) => {
        state.jwt = payload.jwt;
    },
    // 添加tabs（data包含了路由路径跟tab页名字）
    add_tabs(state, data) {
        this.state.options.push(data);
    },
    // 删除tabs    （route是路由路径）
    delete_tabs(state, route) {
        let index = ;
        for (let option of state.options) {
            if (option.route === route) {
                break;
            }
            index++;
        }
        this.state.options.splice(index, ); //删除options里面下标为Index的一个数
    },
    // 设置当前激活的tab
    set_active_index(state, index) {
        this.state.activeIndex = index;
    },
    //设置tab页显示标题
    set_showName(state, name) {
        this.state.showName = name;
    },
    set_role(state, role) {
        this.state.role = role;
    }
}

Getters.js

export default{
    getResturantName:(state)=>{
        return state.resturantName;
    },
    getJwt:(state)=>{
        return state.jwt;
    },
    getResturantName: (state) => {
        return state.resturantName;
    },
    getJwt: (state) => {
        return state.jwt;
    },
    getShowName:(state) => {
        return state.showName;
    },
    getOptions:(state) => {
        return state.options;
    },
    getRole:(state) =>{
        return state.role;
    }
}

LeftNav.vue

<template>
    <el-menu router :default-active="$route.path" default-active="" class="el-menu-vertical-demo" background-color="#334157"
     text-color="#fff" active-text-color="#ffd04b" :collapse="collapsed">
        <!-- <el-menu default-active="" :collapse="collapsed" collapse-transition router :default-active="$route.path" unique-opened class="el-menu-vertical-demo" background-color="#334157" text-color="#fff" active-text-color="#ffd04b"> -->
        <div class="logobox">
            <img class="logoimg" src="../assets/img/logo.png" alt="">
        </div>
        <el-submenu :index="'id_'+m.treeNodeId" v-for="m in menus">
            <template slot="title">
                <i :class="m.icon"></i>
                <span>{{m.treeNodeName}}</span>
            </template>
            <el-menu-item :key="'id_'+m2.treeNodeId" :index="m2.url" @click="showName(m2.treeNodeName)" v-for="m2 in m.children">
                <i :class="m2.icon"></i>
                <span>{{m2.treeNodeName}}</span>
            </el-menu-item>
        </el-submenu>
    </el-menu>
</template>
<script>
    export default {
        data() {
            return {
                collapsed: false,
                menus: []
            }
        },
        created() {
            this.$root.Bus.$on('collapsed-side', (v) => {
                this.collapsed = v;
            })
 
            let url = this.axios.urls.SYSTEM_MENU_TREE;
            // let url = 'http://localhost:8080/T216_SSH/vue/userAction_login.action';
            this.axios.post(url, {}).then((response) => {
                console.log(response);
                this.menus = response.data.result;
            }).catch(function(error) {
                console.log(error);
            });
        },
        methods: {
            showName(name) {
                // 把菜单名称放进去，当成tab页的名称
                this.$store.commit('set_showName', name)
                this.$store.commit('set_role', "pass");
            }
        }
    }
</script>
<style>
    .el-menu-vertical-demo:not(.el-menu--collapse) {
        width: 240px;
        min-height: 400px;
    }
 
    .el-menu-vertical-demo:not(.el-menu--collapse) {
        border: none;
        text-align: left;
    }
 
    .el-menu-item-group__title {
        padding: 0px;
    }
 
    .el-menu-bg {
        background-color: #1f2d3d !important;
    }
 
    .el-menu {
        border: none;
    }
 
    .logobox {
        height: 40px;
        line-height: 40px;
        color: #9d9d9d;
        font-size: 20px;
        text-align: center;
        padding: 20px 0px;
    }
 
    .logoimg {
        height: 40px;
    }
</style>

AppMain.vue

<template>
    <el-container class="main-container">
        <el-aside v-bind:class="asideClass">
            <LeftNav></LeftNav>
        </el-aside>
        <el-container>
            <el-header class="main-header">
                <TopNav></TopNav>
            </el-header>
            <div class="template-tabs">
                <el-tabs v-model="activeIndex" type="border-card" closable @tab-click="tabClick" @tab-remove="tabRemove">
                    <el-tab-pane :key="item.name" v-for="(item, index) in options" :label="item.name" :name="item.route">
                    </el-tab-pane>
                </el-tabs>
            </div>
            <el-main class="main-center">
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
 
<script>
    // 导入组件
    import TopNav from '@/components/TopNav.vue'
    import LeftNav from '@/components/LeftNav.vue'
 
    // 导出模块
    export default {
        data(){
            return {
                asideClass : 'main-aside'
            }
        },
        components:{
            TopNav,LeftNav
        },
        created() {
            this.$root.Bus.$on('collapsed-side',(v)=>{
                this.asideClass = v ? 'main-aside-collapsed':'main-aside';
            })
        },
        methods: {
            // tab切换时，动态的切换路由
            tabClick(tab) {
                             // v-model="activeIndex"是路由路径
                let path = this.activeIndex;
                this.$router.push({ path: path });
                                this.$store.commit('set_role',"nopass");
            },
            tabRemove(targetName) {
                            // console.log(targetName);targetName是路由路径
                                this.$store.commit('set_role',"nopass");
                              // let tabs = this.editableTabs;
                this.$store.commit('delete_tabs', targetName);
                                // 如果激活tab页被关闭，那么需要激活别的tab页，最后一个tab页被关闭，那么跳转主界面
                if (this.activeIndex === targetName) {
                    // 设置当前激活的路由
                    if (this.options && this.options.length >= ) {
                        this.$store.commit('set_active_index', this.options[this.options.length - ].route);
                        this.$router.push({ path: this.activeIndex });
                    }
                       else {
                        this.$router.push({ path: '/AppMain' });
                    }
                }
            }
        },
         watch: {
            '$route'(to) {
                // 只要路由发生改变，就会触发此事件（点击左侧菜单时会触发，删除右侧tab页会触发，切换右侧已存在的tab页会触发）
                        let role=this.$store.state.role;
                        let showName=this.$store.getters.getShowName
                        let flag = false;//判断是否页面中是否已经存在该路由下的tab页
                        //options记录当前页面中已存在的tab页
                        for (let option of this.options) {
                        //用名称匹配，如果存在即将对应的tab页设置为active显示桌面前端
                            if (option.name === showName) {
                                flag = true;
                                this.$store.commit('set_active_index',  to.path);
                                break;
                            }
                        }
                        //如果不存在，则新增tab页，再将新增的tab页设置为active显示在桌面前端
                        // if(role!='nopass'){}
                        if(role=='pass'){
                            if (!flag) {
                                this.$store.commit('add_tabs', { route: to.path, name: showName});
                                this.$store.commit('set_active_index',  to.path);
                            }
                        }
            }
        },
        computed: {
            options() {
                return this.$store.state.options;
            },
            //动态设置及获取当前激活的tab页
            activeIndex: {
                get() {
                    return this.$store.state.activeIndex;
                },
                set(val) {
                    this.$store.commit('set_active_index', val);
                }
            }
        }
    };
</script>
<style type="text/css">
    .el-tabs--border-card>.el-tabs__content {
        padding: 0px;
    }
</style>
<style scoped>
    .main-container {
        height: %;
        width: %;
        box-sizing: border-box;
    }
 
    .main-aside-collapsed {
        /* 在CSS中，通过对某一样式声明! important ，可以更改默认的CSS样式优先级规则，使该条样式属性声明具有最高优先级 */
        width: 64px !important;
        height: %;
        background-color: #;
        margin: 0px;
    }
 
    .main-aside {
        width: 240px !important;
        height: %;
        background-color: #;
        margin: 0px;
    }
 
    .main-header,
    .main-center {
        padding: 0px;
        border-left: 2px solid #;
    }
</style>

子tab页

添加一个子tab页数据

comment.vue

<template>
    <div>
        <el-tabs :tab-position="tabPosition" style="height: 200px;">
            <el-tab-pane label="游客评论">游客评论管理</el-tab-pane>
            <el-tab-pane label="普通会员评论">普通会员评论管理</el-tab-pane>
            <el-tab-pane label="VIP会员评论">VIP会员评论管理</el-tab-pane>
            <el-tab-pane label="SVIP会员评论">SVIP会员评论管理</el-tab-pane>
        </el-tabs>
    </div>
</template>
 
<script>
    export default {
        data() {
            return {
                tabPosition: '评论管理'
            };
        }
    }
</script>
 
<style>
 
</style>

index.js配置

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import Login from '@/views/Login'
import Reg from '@/views/Reg'
import AppMain from '@/components/AppMain'
import LeftNav from '@/components/LeftNav'
import TopNav from '@/components/TopNav'
import Articles from '@/views/sys/Articles'
import VuexPage1 from '@/views/sys/VuexPage1'
import VuexPage2 from '@/views/sys/VuexPage2'
import comment from '@/views/sys/comment'
 
Vue.use(Router)
 
export default new Router({
    routes: [{
            path: '/',
            name: 'Login',
            component: Login
        },
        {
            path: '/Login',
            name: 'Login',
            component: Login
        },
        {
            path: '/Reg',
            name: 'Reg',
            component: Reg
        },
        {
            path: '/AppMain',
            name: 'AppMain',
            component: AppMain,
            children: [{
                    path: '/LeftNav',
                    name: 'LeftNav',
                    component: LeftNav
                },
                {
                    path: '/TopNav',
                    name: 'TopNav',
                    component: TopNav
                },
                {
                    path: '/sys/Articles',
                    name: 'Articles',
                    component: Articles
                },
                {
                    path: '/sys/VuexPage1',
                    name: 'VuexPage1',
                    component: VuexPage1
                },
                {
                    path: '/sys/VuexPage2',
                    name: 'VuexPage2',
                    component: VuexPage2
                },
                {
                    path: '/sys/comment',
                    name: 'comment',
                    component: comment
                }
            ]
        }
 
    ]
})

到这里就结束了