vue2饿了吗之路第二篇:登录

项目地址:https://github.com/wanghao12345/elm

上一章节已经把该项目的基础环境搭好了,这一章节开始饿了吗登录页面的开发,如今几乎所有的网站都必不可少有登录、注册、找回密码、首页等等,所以开发登录界面还是非常有必要的。

准备

  1. 新建login分支,并且将该项目切换到login分支
  2. 将App.vue中的引入logo图片的img删除
  3. 去除原项目中的HelloWord.vue:将原项目src下的components文件夹删除,在src/router/index.js中与HelloWord相关的内容删除掉

此时的App.vue中的代码如下:

 1 <template>
 2   <div id="app">
 3     <router-view/>
 4   div>
 5 template>
 6 
 7 <script>
 8 export default {
 9   name: 'App'
10 }
11 script>
12 
13 <style>
14 #app {
15   font-family: 'Avenir', Helvetica, Arial, sans-serif;
16   -webkit-font-smoothing: antialiased;
17   -moz-osx-font-smoothing: grayscale;
18   text-align: center;
19   color: #2c3e50;
20 }
21 style>
View Code

 修改过后的router/index.js中的代码如下:

1 import Vue from 'vue'
2 import Router from 'vue-router'
3 
4 Vue.use(Router)
5 
6 export default new Router({
7   routes: []
8 })
View Code

创建登录组件

  1. 在src下面建立page文件夹,page文件夹里面以后主要存放各个页面的组件,并在page文件夹下创建login文件夹,这时候在login文件夹里面创建一个Login.vue文件和components文件夹,这里的components文件夹主要用于创建一些与登录组件相关的子组件。
  2. 创建登录的头部,因为头部文件通用性非常强,因此,在src下面建立一个common文件夹,这里的common文件夹主要存放各个页面的公用组件。在common文件夹下创建Header.vue文件
  3. 登录组件中引入头部组件
  4. 在router/index.js中添加登录页面的路由

头部组件src/common/Header.vue初始代码:

 1 <template>
 2   <div>头部div>
 3 template>
 4 
 5 <script>
 6 export default {
 7   name: 'Header',
 8   data () {
 9     return {
10 
11     }
12   }
13 }
14 script>
15 
16 <style lang="css" scoped>
17 style>
View Code

登录组件src/page/login/Login.vue组件引用头部组件后:

 1 <template>
 2   <div>
 3     <login-header>login-header>
 4   div>
 5 template>
 6 <script>
 7 import LoginHeader from '@/common/Header'
 8 export default {
 9   name: 'Login',
10   components: {
11     LoginHeader
12   },
13   data () {
14     return {
15 
16     }
17   }
18 }
19 script>
20 
21 <style lang="css" scoped>
22 style>
View Code

此时的router/index.js:

 1 import Vue from 'vue'
 2 import Router from 'vue-router'
 3 import Login from '@/page/login/Login'
 4 
 5 Vue.use(Router)
 6 
 7 export default new Router({
 8   routes: [
 9     {
10       path: '/',
11       name: 'Login',
12       component: Login
13     }]
14 })
View Code

引入外部资源 

为了开发的遍历,所以项目需要引入以下外部资源

1、安装sass

  1. 使用命令行工具进入elm文件夹
  2. 运行:cnpm install --save-dev sass-loader
  3. 然后还得安装node-sass,因为sass-loader依赖于node-sass:cnpm install --save-dev node-sass

2.引入全局样式reset.scss

在assets文件夹下加入reset.scss,然后在main.js中使用 import './assets/reset.scss'即可。

此时的main.js中的代码如下:

 1 import Vue from 'vue'
 2 import App from './App'
 3 import router from './router'
 4 import './assets/reset.scss'
 5 
 6 Vue.config.productionTip = false
 7 
 8 /* eslint-disable no-new */
 9 new Vue({
10   el: '#app',
11   router,
12   components: { App },
13   template: '<App/>'
14 })
View Code

3.引入rem自适应js

在index.html中引入rem自适应的js,设置1rem=20px

index.html:

 1 DOCTYPE html>
 2 <html>
 3   <head>
 4     <meta charset="utf-8">
 5     <meta name="viewport" content="width=device-width,initial-scale=1.0">
 6     <title>elmtitle>
 7   head>
 8   <body>
 9     <div id="app">div>
10     
11   body>
12   <script type="text/javascript">
13     (function(doc, win) {
14         var docEl = doc.documentElement,
15             resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
16             recalc = function() {
17                 var clientWidth = docEl.clientWidth;
18                 if (!clientWidth) return;
19                 docEl.style.fontSize = 20 * (clientWidth / 320) + 'px';
20             };
21         if (!doc.addEventListener) return;
22         win.addEventListener(resizeEvt, recalc, false);
23         doc.addEventListener('DOMContentLoaded', recalc, false);
24     })(document, window);
25   script>
26 html>
View Code

4.引入element-ui

使用cnpm install element-ui -save引入element-ui组件库,然后在main.js里面引入

 1 // The Vue build version to load with the `import` command
 2 // (runtime-only or standalone) has been set in webpack.base.conf with an alias.
 3 import Vue from 'vue'
 4 import App from './App'
 5 import router from './router'
 6 import ElementUI from 'element-ui'
 7 import './assets/style/reset.css'
 8 import './assets/style/iconfont.css'
 9 import 'element-ui/lib/theme-chalk/index.css'
10 import './assets/style/elementModify.css'
11 
12 // 使用element
13 Vue.use(ElementUI, {size: 'small', zIndex: 3000})
14 
15 Vue.config.productionTip = false
16 
17 /* eslint-disable no-new */
18 new Vue({
19   el: '#app',
20   router,
21   components: { App },
22   template: '<App/>'
23 })
View Code

完成页面切图

完成页面切图的效果如下:

vue2饿了吗之路第二篇:登录_第1张图片

此时头部组件的代码为:

 1 <template>
 2   <div class="header-container">
 3     <router-link
 4       to="-1"
 5       tag="i"
 6     >
 7       <i class="iconfont back-btn">i>
 8     router-link>
 9     <div class="header-title">{{HeadTitle}}div>
10     <i class="login-register-btn" v-show="LoginIcon">登录|注册i>
11   div>
12 template>
13 
14 <script>
15 export default {
16   name: 'Header',
17   data () {
18     return {
19       loginStatus: false
20     }
21   },
22   props: {
23     HeadTitle: String,
24     LoginIcon: Boolean
25   }
26 }
27 script>
28 
29 <style lang="scss" scoped>
30   @import '~style/variable.scss';
31   .header-container{
32     width: 100%;
33     height: $HeaderHeight;
34     line-height: $HeaderHeight;
35     background: $BackgroundColor;
36     color: white;
37     position: relative;
38     @include wh(100%, 2rem)
39     .back-btn{
40       float: left;
41       width: 2rem;
42     }
43     .header-title{
44       font-size: 0.7rem;
45       width: 100%;
46       height: 100%;
47       position: absolute;
48     }
49     .login-register-btn{
50       position: absolute;
51       right: 0.5rem;
52       font-size: 0.65rem;
53     }
54   }
55 style>
View Code

新增page/login/components/LoginForm表单组件,用于登录操作部分,LoginForm表单如下:

  1 <template>
  2   <div>
  3     <div class="FormContainer">
  4       <form>
  5         <section class="input_container">
  6           <input type="text" placeholder="账号" v-model="userAccount">
  7         section>
  8         <section class="input_container">
  9           <input type="password" placeholder="密码" v-model="passWord">
 10         section>
 11         <section class="input_container">
 12           <input type="text" placeholder="验证码" v-model="codeNumber">
 13           <div class="code-img">
 14             <img src="" alt="验证码">
 15             <div class="change-code-img">
 16               <p>看不清p>
 17               <p class="change-btn">换一张p>
 18             div>
 19           div>
 20         section>
 21       form>
 22     div>
 23     <p class="login_tips">温馨提示:未注册过的账号,登录时将自动注册p>
 24     <p class="login_tips">注册过的用户可凭账号密码登录p>
 25     <button class="login-btn">登录button>
 26   div>
 27 
 28 template>
 29 
 30 <script>
 31 export default {
 32   name: 'LoginForm',
 33   data () {
 34     return {
 35       userAccount: null,
 36       passWord: null,
 37       codeNumber: null
 38     }
 39   }
 40 }
 41 script>
 42 
 43 <style lang="scss" scoped>
 44   @import '~style/variable.scss';
 45   .FormContainer{
 46     width: 100%;
 47     height: 6.3rem;
 48     background: white;
 49     margin-top: 0.6rem;
 50     .input_container{
 51       width: 100%;
 52       height: 2.1rem;
 53       border-bottom: 1px solid #f1f1f1;
 54       padding: 0.6rem 0.8rem;
 55       box-sizing: border-box;
 56       overflow: hidden;
 57       position: relative;
 58       input{
 59         float: left;
 60         border: 0;
 61         font-size: 0.7rem;
 62       }
 63       .code-img{
 64         position: absolute;
 65         width: 6rem;
 66         height: 100%;
 67         right: 1rem;
 68         top: 0;
 69         bottom: 0;
 70         overflow: hidden
 71         img{
 72           width: 4rem;
 73           height: 100%;
 74           display: block;
 75           float: left;
 76         }
 77         .change-code-img{
 78           float: right;
 79           width: 2rem;
 80           height: 100%;
 81           font-size: 0.6rem;
 82           line-height: 1rem;
 83           .change-btn{
 84             color: $BackgroundColor;
 85           }
 86         }
 87       }
 88     }
 89   }
 90   .login_tips{
 91     color: red;
 92     text-align: left;
 93     font-size: 0.6rem;
 94     line-height: 1.2rem;
 95     box-sizing: border-box;
 96     padding-left: 0.5rem;
 97   }
 98   .login-btn{
 99     margin: 0 .5rem 1rem;
100     font-size: 0.7rem;
101     color: #fff;
102     background-color: #4cd964;
103     padding: .5rem 0;
104     border: 1px;
105     border-radius: 0.15rem;
106     text-align: center;
107     width: 15rem;    
108   }
109 style>
View Code

将LoginForm组件引入Login组件中,并引用:

 1 <template>
 2   <div>
 3     <login-header
 4       :HeadTitle="HeadTitle"
 5     >
 6     login-header>
 7     <login-form>login-form>
 8   div>
 9 template>
10 <script>
11 import LoginHeader from '@/common/Header'
12 import LoginForm from './components/LoginForm.vue'
13 export default {
14   name: 'Login',
15   components: {
16     LoginHeader,
17     LoginForm
18   },
19   data () {
20     return {
21       HeadTitle: '密码登录'
22     }
23   }
24 }
25 script>
26 
27 <style lang="scss" scoped>
28 style>
View Code

数据交互

增加src/config/env.js进行数据交互的基本配置

 1 /**
 2  * 配置编译环境和线上环境之间的切换
 3  *
 4  * baseUrl: 域名地址
 5  * routerMode: 路由模式
 6  * imgBaseUrl: 图片所在域名地址
 7  */
 8 let baseUrl = ''
 9 let routerMode = 'hash'
10 let imgBaseUrl = ''
11 
12 if (process.env.Node_ENV === 'development') {
13   imgBaseUrl = '/img/'
14 } else {
15   baseUrl = '//elm.cangdu.org'
16   imgBaseUrl = '//elm.cangdu.org/img/'
17 }
18 
19 export {
20   baseUrl,
21   routerMode,
22   imgBaseUrl
23 }
View Code

在项目的开发中,我们使用了fetch的数据绑定方法,因此新建src/config/fetch.js文件,这是一个公用的数据请求文件

 1 import { baseUrl } from './env'
 2 
 3 export default async (url = '', data = {}, type = 'GET', method = 'fetch') => {
 4   type = type.toUpperCase()
 5   url = baseUrl + url
 6 
 7   if (type === 'GET') {
 8     // 数据拼接字符串
 9     let dataStr = ''
10     Object.keys(data).forEach(key => {
11       dataStr += key + '=' + data[key] + '&'
12     })
13     if (dataStr !== '') {
14       dataStr = dataStr.substr(0, dataStr.lastIndexOf('&'))
15       url = url + '?' + dataStr
16     }
17   }
18   if (window.fetch && method === 'fetch') {
19     let requestConfig = {
20       credentials: 'include',
21       method: type,
22       headers: {
23         'Accept': 'application/json',
24         'Content-Type': 'application/json'
25       },
26       mode: 'cors',
27       cache: 'force-cache'
28     }
29 
30     if (type === 'POST') {
31       Object.defineProperty(requestConfig, 'body', {
32         value: JSON.stringify(data)
33       })
34     }
35     try {
36       const response = await fetch(url, requestConfig)
37       const responseJson = await response.json()
38       return responseJson
39     } catch (error) {
40       throw new Error(error)
41     }
42   } else {
43     return new Promise((resolve, reject) => {
44       let requestObj
45       // if (window.XMLHttpRequest) {
46       //   requestObj = new XMLHttpRequest()
47       // } else {
48       //   requestObj = new ActiveXObject
49       // }
50       requestObj = new XMLHttpRequest()
51       let sendData = ''
52       if (type === 'POST') {
53         sendData = JSON.stringify(data)
54       }
55 
56       requestObj.open(type, url, true)
57       requestObj.setRequestHeader('Content-type', 'application/x-www-form-urlencoded')
58       requestObj.send(sendData)
59 
60       requestObj.onreadystatechange = () => {
61         if (requestObj.readyState === 4) {
62           if (requestObj.status === 200) {
63             let obj = requestObj.response
64             if (typeof obj !== 'object') {
65               obj = JSON.parse(obj)
66             }
67             resolve(obj)
68           } else {
69             reject(requestObj)
70           }
71         }
72       }
73     })
74   }
75 }
View Code

在这个项目中,我们将所有的请求函数放到同一个文件中,因此也新增src/service/getData.js文件

 1 import fetch from '../config/fetch'
 2 
 3 /**
 4  * 获取图片验证码
 5  */
 6 export const getcaptchas = () => fetch('/v1/captchas', {}, 'POST')
 7 
 8 /**
 9  * 账号登录请求
10  */
11 export const accountLogin = (username, password, captchaCode) => fetch('/v2/login', {username, password, captchaCode}, 'POST')
View Code

完善登录组件的LoginForm.vue

  1 <template>
  2   <div>
  3     <div class="FormContainer">
  4       <form>
  5         <section class="input_container">
  6           <input type="text" placeholder="账号" v-model="userAccount">
  7         section>
  8         <section class="input_container">
  9           <input :type="passwordType" placeholder="密码" v-model="passWord">
 10           <div class="password-see">
 11             <i class="iconfont" v-show='switchPassword' @click="openPasswordShow">i>
 12             <i class="iconfont" v-show='!switchPassword' @click="closePasswordShow">i>
 13           div>
 14         section>
 15         <section class="input_container">
 16           <input type="text" placeholder="验证码" v-model="codeNumber">
 17           <div class="code-img">
 18             <img class="img" :src="captchaCodeImg" alt="验证码">
 19             <div class="change-code-img" @click="getCaptchaCode">
 20               <p>看不清p>
 21               <p class="change-btn">换一张p>
 22             div>
 23           div>
 24         section>
 25       form>
 26     div>
 27     <p class="login_tips">温馨提示:未注册过的账号,登录时将自动注册p>
 28     <p class="login_tips">注册过的用户可凭账号密码登录p>
 29     <button class="login-btn" @click="handleLoginRequest">登录button>
 30   div>
 31 template>
 32 
 33 <script>
 34 import {getcaptchas, accountLogin} from '../../../service/getData'
 35 export default {
 36   name: 'LoginForm',
 37   data () {
 38     return {
 39       userInfo: null, // 用户信息
 40       userAccount: null, // 用户名账号
 41       passWord: null, // 密码
 42       codeNumber: null, // 验证码
 43       captchaCodeImg: null, // 验证码图片
 44       passwordType: 'password', // 密码的隐藏与显示
 45       switchPassword: true // 密码显示与隐藏的开关
 46     }
 47   },
 48   created () {
 49     this.getCaptchaCode()
 50   },
 51   methods: {
 52     /**
 53      * 获取验证码
 54      */
 55     async getCaptchaCode () {
 56       let res = await getcaptchas()
 57       this.captchaCodeImg = res.code
 58     },
 59     /**
 60      * 开启密码的显示
 61      */
 62     openPasswordShow () {
 63       this.passwordType = 'text'
 64       this.switchPassword = false
 65     },
 66     /**
 67      * 关闭密码的显示
 68      */
 69     closePasswordShow () {
 70       this.passwordType = 'password'
 71       this.switchPassword = true
 72     },
 73     /**
 74      * 登录请求
 75      */
 76     async handleLoginRequest () {
 77       if (!this.userAccount) {
 78         this.$alert('账号不能为空', '提示', {
 79           confirmButtonText: '确定',
 80           callback: action => {}
 81         })
 82       } else if (!this.passWord) {
 83         this.$alert('密码不能为空', '提示', {
 84           confirmButtonText: '确定',
 85           callback: action => {}
 86         })
 87       } else if (!this.codeNumber) {
 88         this.$alert('验证码不能为空', '提示', {
 89           confirmButtonText: '确定',
 90           callback: action => {}
 91         })
 92       } else {
 93         this.userInfo = await accountLogin(this.userAccount, this.passWord, this.codeNumber)
 94         if (!this.userInfo.user_id) {
 95           this.$alert(this.userInfo.message, '提示', {
 96             confirmButtonText: '确定',
 97             callback: action => {}
 98           })
 99         } else {
100 
101         }
102       }
103     }
104   }
105 }
106 script>
107 
108 <style lang="scss" scoped>
109   @import '~style/variable.scss';
110   .FormContainer{
111     width: 100%;
112     height: 6.3rem;
113     background: white;
114     margin-top: 0.6rem;
115     .input_container{
116       width: 100%;
117       height: 2.1rem;
118       border-bottom: 1px solid #f1f1f1;
119       padding: 0.6rem 0.8rem;
120       box-sizing: border-box;
121       overflow: hidden;
122       position: relative;
123       input{
124         float: left;
125         border: 0;
126         font-size: 0.7rem;
127       }
128       .code-img{
129         position: absolute;
130         width: 6rem;
131         height: 100%;
132         right: 1rem;
133         top: 0;
134         bottom: 0;
135         overflow: hidden;
136         .img{
137           width: 4rem;
138           height: 1.5rem;
139           display: block;
140           float: left;
141           margin-top: 0.25rem;
142         }
143         .change-code-img{
144           float: right;
145           width: 2rem;
146           height: 100%;
147           font-size: 0.6rem;
148           line-height: 1rem;
149           .change-btn{
150             color: $BackgroundColor;
151           }
152         }
153       }
154       .password-see{
155         position: absolute;
156         right: 1rem;
157         top: 0rem;
158         line-height: 2rem;
159         .iconfont{
160           font-size: 1.2rem;
161           color: #3190e8;
162         }
163       }
164     }
165   }
166   .login_tips{
167     color: red;
168     text-align: left;
169     font-size: 0.6rem;
170     line-height: 1.2rem;
171     box-sizing: border-box;
172     padding-left: 0.5rem;
173   }
174   .login-btn{
175     margin: 0 .5rem 1rem;
176     font-size: 0.7rem;
177     color: #fff;
178     background-color: #4cd964;
179     padding: .5rem 0;
180     border: 1px;
181     border-radius: 0.15rem;
182     text-align: center;
183     width: 15rem;
184   }
185 style>
View Code

结语

此时登录部分的开发已经完成了,接下来将会进行地址列表页面的开发,登录页面效果图如下:

vue2饿了吗之路第二篇:登录_第2张图片    vue2饿了吗之路第二篇:登录_第3张图片

 

转载于:https://www.cnblogs.com/wanghao123/p/9184041.html

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