Vue实现页面导航实战

亦凉 2021-07-24 22:36 690阅读 0赞

**目录**

一 使用技术栈

二 创建项目

三 准备资源文件

四 安装axios

五 代码

六 测试

七 源码参考

--------------------

# 一 使用技术栈 #

1 组件及组件间传值

2 axios实现读取json数据：商品数据源存于json中

3 css相关技术进行布局：布局、间距等样式

4 使用views页面级组件，使用router设置页面

# 二 创建项目 #

1 创建项目

F:\vue\proj>vue create proj

2 选择必要组件

? Check the features needed for your project:
    (*) Babel
    ( ) TypeScript
    ( ) Progressive Web App (PWA) Support
    (*) Router
    ( ) Vuex
    ( ) CSS Pre-processors
    >( ) Linter / Formatter
    ( ) Unit Testing
    ( ) E2E Testing

3 选择history模式

? Use history mode for router? (Requires proper server setup for index fallback in production) (Y/n) y

4 选择使用package.json来记录

? Where do you prefer placing config for Babel, ESLint, etc.? In package.json

5 选不保存为预制项目

? Save this as a preset for future projects? (y/N) n

6 开始安装

7 运行

cd proj
    npm run serve

# 三 准备资源文件 #

1 准备图片

![20200822151606910.png][]

2 准备json文件

bjb.json

[
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb1.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb2.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb3.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb4.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb5.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb6.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb7.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb8.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb9.jpg"
      },
      {
        "goodName": "联想笔记本",
        "img": "img/bjb/bjb10.jpg"
      }
    ]

shouji.json

[
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj1.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj2.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj3.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj4.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj5.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj6.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj7.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj8.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj9.jpg"
      },
      {
        "goodName": "华为手机",
        "img": "img/shouji/sj10.jpg"
      }
    ]

# 四 安装axios #

cnpm i axios -S

# 五 代码 #

1 创建首页First.vue

<template>
        <div class="main">
            <div class="left">
                <Left></Left>
            </div>
            <div class="right">
                <div class="top">
                    <img src="img/title.jpg" alt="">
                </div>
                <div class="buttom">
                    <Right></Right>
                </div>
            </div>
        </div>
    </template>
    
    <script>
        /* 引用组件*/
        import Left from '../components/Left.vue'
        import Right from '../components/Right.vue'
        export default {
            name: "First",
            /* 页面要用到的组件都放在这里 */
            components: {
                Left,
                Right
            }
        }
    </script>
    
    <style scoped>
        * {
            padding: 0;
            margin: 0;
        }
    
        .left {
            width: 100px;
            float: left;
            margin-right: 10px;
        }
    
        .right {
            width: 1000px;
            float: left;
            margin-left: 10px;
        }
    
        .main {
            width: 1200px;
            margin: 20px auto;
        }
    
        .top img {
            height: 200px;
            width: 1000px;
        }
    
        .left, .right {
            background-color: #f5f5f5;
            height: 660px
        }
    </style>

2  创建路由文件index.js

import Vue from 'vue'
    import VueRouter from 'vue-router'
    // 不用系统默认主页，而是自定义主页
    // import Home from '../views/Home.vue'
    // 引入主页
    import First from '../views/First.vue'
    
    Vue.use(VueRouter)
      // 主页路由
      const routes = [
      {
        path: '/',
        component: First
      },
      {
        path: '/about',
        name: 'About',
        // route level code-splitting
        // this generates a separate chunk (about.[hash].js) for this route
        // which is lazy-loaded when the route is visited.
        component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
      }
    ]
    
    const router = new VueRouter({
      mode: 'history',
      base: process.env.BASE_URL,
      routes
    })
    
    export default router

3 App.vue

<template>
      <div id="app">
        <router-view/>
      </div>
    </template>
    
    <style>
    #app {
      font-family: Avenir, Helvetica, Arial, sans-serif;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-align: center;
      color: #2c3e50;
    }
    
    #nav {
      padding: 30px;
    }
    
    #nav a {
      font-weight: bold;
      color: #2c3e50;
    }
    
    #nav a.router-link-exact-active {
      color: #42b983;
    }
    </style>

4 左边导航组件left.vue

<template>
        <div>
            <div class="title">热门推荐</div>
            <ul class="menu">
                <li @click="menu1">笔记本电脑</li>
                <li @click="menu2">手机</li>
                <li @click="menu3">服饰</li>
                <li @click="menu4">手表</li>
                <li>书籍</li>
                <li>玩具</li>
                <li>小家电</li>
                <li>学习用品</li>
                <li>办公用品</li>
                <li>旅游必备</li>
                <li>游戏卡通</li>
            </ul>
        </div>
    </template>
    
    <script>
        // 引入事件总线
        import Msg from './Msg.js'
    
    
        export default {
            name: "left",
            methods: {
                menu1: function () {
                    // 通过数据总线传值给兄弟节点
                    Msg.$emit("val", "1");
                },
                menu2: function () {
                    // 通过数据总线传值给兄弟节点
                    Msg.$emit("val", "2");
                },
                menu3: function () {
                    // 通过数据总线传值给兄弟节点
                    Msg.$emit("val", "3");
                },
                menu4: function () {
                    // 通过数据总线传值给兄弟节点
                    Msg.$emit("val", "4");
                }
            }
        }
    </script>
    
    <style scoped>
        .title {
            width: 100px;
            color: red;
        }
    
        .menu {
            padding-inline-start: 0px;
        }
    
        .menu li {
            list-style: none;
            height: 50px;
            margin-bottom: 2px;
            background-color: white;
            line-height: 50px;
            /* 改变鼠标指针为手形形状 */
            cursor: pointer;
        }
    </style>

5 事件总线Msg.js，用于同级组件传值

// 事件总线文件是js文件，不是vue文件
    import  Vue from 'vue'
    export default  new Vue

6 右边内容组件Right.vue

<template>
        <div>
            
            <div v-if="kk==1">
                
                <GoodList :goodId="1"></GoodList>
            </div>
            <div v-else-if="kk==2">
                <GoodList v-bind:goodId="2"></GoodList>
            </div>
            <div v-else-if="kk==3">
                33333333333
            </div>
            <div v-else-if="kk==4">
                4444444444
            </div>
            <div v-else>
                <GoodList v-bind:goodId="1"></GoodList>
            </div>
        </div>
    </template>
    
    <script>
        // 引入事件总线
        import Msg from './Msg.js'
        // 引入自定义组件
        import GoodList from "./GoodList"
        // 下面这种写法也可以
        // import GoodList from "./GoodList.vue"
    
        export default {
            name: "Right",
            data() {
                return {
                    kk: 0
                }
            },
            mounted() {
                // _this 是 this 的副本，不能用this，因为页面中不同的this含义不同，所以要用一个副本存储
                var _this = this;
                // 此处的 val 接收 left.vue 中兄弟节点传过来的值，然后 val 的值再传给m
                Msg.$on('val', function (m) {
                    _this.kk = m;
                    // 这里不能用 this.kk ，因为它表示的是on里面的内容，这就是前面为什么用_this的原因
                    // this.kk = m //错误
                })
            },
            // 组件注册放在这里
            components: {
                GoodList
            }
        }
    </script>
    
    <style scoped>
    
    </style>

7 main.js

import Vue from 'vue'
    import App from './App.vue'
    import router from './router'
    // 引入 axios
    import axios from 'axios'
    // 全局注册 axios
    Vue.prototype.$http = axios
    Vue.config.productionTip = false
    
    new Vue({
        router,
        render: h => h(App)
    }).$mount('#app')

8 商品列表组件GoodList.vue

<template>
        <div name="show">
            <ul class="goodList">
                <li v-for="goods in list">
                    
                    <img v-bind:src="goods.img">
                    <p>{
       {goods.goodName}}</p>
                </li>
            </ul>
        </div>
    </template>
    
    <script>
        export default {
            name: "show",
            data() {
                // 初始化代码
                var obj = this;
                var url;
                if (obj.goodId == 1) {
                    url = "json/bjb.json"
                } else if (obj.goodId == 2) {
                    url = "json/shouji.json"
                }
                this.$http.get(url).then(function (res) {
                    obj.list = res.data;
                })
                return {
                    list: []
                }
            },
            props: {
                // 调用组件时定义了goodId
                goodId: Number
            },
            /* 监听传递的参数 */
            watch: {
                goodId() {
                    var obj = this;
                    var url = "";
                    if (obj.goodId == 1) {
                        url = "json/bjb.json"
                    } else if (obj.goodId == 2) {
                        url = "json/shouji.json"
                    }
                    this.$http.get(url).then(function (res) {
                        obj.list = res.data;
                    })
                    return {
                        list: []
                    }
                }
            }
        }
    </script>
    
    <style scoped>
        .goodList li {
            width: 190px;
            height: 190px;
            list-style: none;
            float: left;
            font-size: 9px;
            color: red;
            margin-bottom: 30px;
        }
    
        .goodList img {
            width: 180px;
            height: 180px;
        }
    </style>

# 六 测试 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

# 七 源码参考 #

[https://gitee.com/cakin24/prog][https_gitee.com_cakin24_prog]

[20200822151606910.png]: /images/20210724/36baa77f5e8c47e1a187426c204d3cfc.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/3bd984683ce643cfa2bef4c60a1c4096.png
[https_gitee.com_cakin24_prog]: https://gitee.com/cakin24/prog