【Vue-Element-Template】添加自己的登錄頁面（一）

背景交代：

框架使用了Vue-Element-Template：框架下載地址

使用框架前建議先了解vue.js基本語法、了解Vue-Element-Template文檔的基本框架描述

1、在View下新建文件夾mylogin，並創建自己的登陸頁index，如下圖：

 

 具體內容可參考login文件夾下的index文件，附我拷貝並添加部分注解的index頁面代碼

<template>
  <div class="login-container">
    <el-form ref="myLoginForm" :model="myLoginForm" :role="myLoginRole" label-position="left" class="login-form" auto-complete="on">
      <div class="title-container">
        <h3 class="title">后台登錄系統</h3>
      </div>
      <el-form-item prop="用戶名">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="myLoginForm.username"
          tabindex="1"
          placeholder="請輸入用戶名"
          name="username"
          auto-complete="on"
          type="text"
        />
      </el-form-item>
      <el-form-item prop="密 碼">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="myLoginForm.password"
          tabindex="2"
          placeholder="請輸入密碼"
          name="password"
          auto-complete="on"
          :type="passwordType"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登 錄</el-button>
      <div class="tips">
        <span style="margin-right:20px;">username: admin</span>
        <span> password: any</span>
      </div>
    </el-form>
  </div>
</template>

<script>
export default {
  name: 'MyLogin2',
  data() {
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('輸入密碼不能太短'))
      } else {
        callback()
      }
    }
    const validateUsername = (rule, value, callback) => {
      if (value.length <= 0) {
        callback(new Error('請輸入用戶名'))
      } else {
        callback()
      }
    }
    return {
      // 表單元素綁定的初始mode值
      myLoginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表單元素的驗證規則
      myLoginRole: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        console.log(route.query)
        console.log(route.query.redirect)
        this.redirect = route.query && route.query.redirect
      },
      // 立即執行
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      // 如果你在數據改變之后的操作跟改變之后的DOM有關
      this.$nextTick(() => {
        this.$refs.password.focus() // 設置password控件被聚焦
      })
    },
    handleLogin() {
      this.$refs.myLoginForm.validate(valid => {
        // 如果驗證通過返回true，直接將提交按鈕置為加載中，同時提交數據
        if (valid) {
          this.loading = true
          this.$store
            .dispatch('user/Mylogin', this.myLoginForm)
            .then(() => {
              this.$router.push({ path: this.redirect || '/' }) // 路由傳值，用於導航到下一個頁面 登錄成功之后重定向this.redirect或者'/'首頁
              this.loading = false
            })
            .catch(err => {
              this.$message.error(err) // 登錄失敗提示錯誤
              this.loading = false
            })
        } else { // 如果驗證失敗打印日志，同時返回false
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修復input 背景不協調 和光標變色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>

 

2、由於在index頁面，提交表單驗證時，使用了自己的方法。

this.$store.dispatch('user/Mylogin', this.myLoginForm)

所以還需要在modules的user.js文件中添加自己的Mylogin方法

 

 

// user login
  login({ commit }, userInfo) {
    const { username, password } = userInfo
    return new Promise((resolve, reject) => {
      login({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        commit('SET_TOKEN', data.token)
        setToken(data.token)
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // 自己頁面的 login方法
  Mylogin({ commit }, userInfo) {
    const { username, password } = userInfo
    return new Promise((resolve, reject) => {
      login({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        commit('SET_TOKEN', data.token)
        setToken(data.token)
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

 

 

3、在router文件夾下添加自己頁面的路由信息，原來的login信息可以不動

 

 

  {
    path: '/mylogin',
    component: () => import('@/views/mylogin/index'),
    hidden: true
  },

  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

 

上述步驟完成后運行 npm run dev跑起來項目

運行起來頁面白板，看到報錯信息為：

RangeError: Maximum call stack size exceeded

解決方法：

在permission.js文件中修改白名單地址，默認的白名單地址時login，新增加頁面是mylogin，所以需要改動

 

 

自己改的代碼和部分注釋

import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

// const whiteList = ['/login'] // no redirect whitelist
const whiteList = ['/mylogin'] // no redirect whitelist
router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // 在此時獲取token值
  const hasToken = getToken()
  // 如果token有值，說明用戶已登錄過
  if (hasToken) {
    if (to.path === '/mylogin') { // 判斷當前是否在登陸頁，如果是跳轉到首頁
      next({ path: '/' })
      NProgress.done()
    } else {
      // 獲取用戶信息
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // 如果拿不到，異步獲取用戶信息
          await store.dispatch('user/getInfo')
          next()
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          // next(`/login?redirect=${to.path}`)
          next(`/mylogin?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else { // 沒有token
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) { // 如果是白名單的頁面，直接進
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      // next(`/login?redirect=${to.path}`)
      next(`/mylogin?redirect=${to.path}`) // 不是白名單的頁面直接登錄頁
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})