vue前端頁面資料載入新增loading效果的實現

2022-07-01 14:00:39

前端頁面資料載入新增loading效果

在前端上傳檔案或者載入資料的時候會有一段等待時間，如果加上一個loading效果會減輕使用者等待的枯燥，這裡就來記錄學習一下如何實現loading效果。

效果大致如下，樣式我們是可以自定義的。

具體實現

let thisContent = this;
let loading = thisContent.$loading({
        lock: true,
        text: '上傳中，請稍候...',
        spinner: 'el-icon-loading',
        background: 'rgba(0, 0, 0, 0.5)'
      })
// 中間進行一系列的操作
// 上傳成功後關閉loading， 並顯示上傳成功
loading.close();
thisC.$message('上傳檔案成功');

這樣一個簡單的loading效果就實現了。

全域性loading設定

請求的時候需要一個全域性loading來攔截若是頁面單獨參照的話就有點繁瑣了所以需要再全域性封裝一個此時就要明白再哪裡封裝了先考慮一下為什麼要用

一方面是為了防止重複操作

另一方面是為了一個載入的效果能夠更明顯

所以再請求的時候加就能聯想到axios攔截器的位置處理了話不多說開始擼程式碼全程copy就行了

1 再src/componennts/Spinner下面建立一個index.vue

<template>
  <div class="loading-page bg-opacity" :style="{display:hide?'none':'block'}">
    <div class="dark" @dblclick="close">
      <div class="la-ball-spin-clockwise la-2x">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        hide: true
      }
    },
    methods: {
      close() {
        document.querySelector('.loading-page').style.display = 'none';
      }
    }
  }
</script>

 
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss">
  .show {
    display: block;
  }
 
  .hide {
    display: none;
  }
 
  .loading-page {
    background: rgba(0, 0, 0, .65);
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: 100%;
    min-width: 100%;
    transition: all 1s;
    z-index: 20000;
    &.hide {
      display: none;
    }
    &.bg-opacity {
      background: rgba(0, 0, 0, 0);
    }
    .dark {
      width: 100px;
      height: 100px;
      border-radius: 10px;
      background: rgba(0, 0, 0, .65);
      position: absolute;
      top: 40%;
      left: 50%;
      margin-left: -50px;
      text-align: center;
      img {
        width: 70px;
        height: 70px;
        margin-top: 15px;
      }
    }
  }
  .la-ball-spin-clockwise{
    width: 64px;
    height: 64px;
    margin-top: 18px;
    margin-left: 18px;
    display: block;
    font-size: 0;
    color: #fff;
    position: relative;
    box-sizing: border-box;
    animation-play-state: running;
  }
  .la-ball-spin-clockwise>div{
    width: 16px;
    height: 16px;
    margin-top: -8px;
    margin-left: -8px;
    position: absolute;
    border-radius: 100%;
    animation: ball-spin-clockwise 1s infinite ease-in-out;
    display: inline-block;
    float: none;
    background-color: currentColor;
    border: 0 solid currentColor;
    animation-play-state: running;
  }
  .la-ball-spin-clockwise>div:nth-child(1){
    top: 5%;
    left: 50%;
    webkit-animation-delay: -.875s;
    -moz-animation-delay: -.875s;
    -o-animation-delay: -.875s;
    animation-delay: -.875s;
  }
  .la-ball-spin-clockwise>div:nth-child(2) {
    top: 18.1801948466%;
    left: 81.8198051534%;
    -webkit-animation-delay: -.75s;
    -moz-animation-delay: -.75s;
    -o-animation-delay: -.75s;
    animation-delay: -.75s;
  }
  .la-ball-spin-clockwise>div:nth-child(3) {
    top: 50%;
    left: 95%;
    -webkit-animation-delay: -.625s;
    -moz-animation-delay: -.625s;
    -o-animation-delay: -.625s;
    animation-delay: -.625s;
  }
  .la-ball-spin-clockwise>div:nth-child(4) {
    top: 81.8198051534%;
    left: 81.8198051534%;
    -webkit-animation-delay: -.5s;
    -moz-animation-delay: -.5s;
    -o-animation-delay: -.5s;
    animation-delay: -.5s;
  }
  .la-ball-spin-clockwise>div:nth-child(5) {
    top: 94.9999999966%;
    left: 50.0000000005%;
    -webkit-animation-delay: -.375s;
    -moz-animation-delay: -.375s;
    -o-animation-delay: -.375s;
    animation-delay: -.375s;
  }
  .la-ball-spin-clockwise>div:nth-child(6) {
    top: 81.8198046966%;
    left: 18.1801949248%;
    -webkit-animation-delay: -.25s;
    -moz-animation-delay: -.25s;
    -o-animation-delay: -.25s;
    animation-delay: -.25s;
  }
  .la-ball-spin-clockwise>div:nth-child(7) {
    top: 49.9999750815%;
    left: 5.0000051215%;
    -webkit-animation-delay: -.125s;
    -moz-animation-delay: -.125s;
    -o-animation-delay: -.125s;
    animation-delay: -.125s;
  }
  .la-ball-spin-clockwise>div:nth-child(8) {
    top: 18.179464974%;
    left: 18.1803700518%;
    -webkit-animation-delay: 0s;
    -moz-animation-delay: 0s;
    -o-animation-delay: 0s;
    animation-delay: 0s;
  }
  @-webkit-keyframes ball-spin-clockwise{
    0%,100%{
      opacity:1;
      -webkit-transform:scale(1);
      transform:scale(1)}
    20%{
      opacity:1
    }
    80%{
      opacity:0;
      -webkit-transform:scale(0);
      transform:scale(0)
    }
  }
  @-moz-keyframes ball-spin-clockwise{
    0%,100%{
      opacity:1;
      -moz-transform:scale(1);
      transform:scale(1)
    }
    20%{
      opacity:1
    }
    80%{
      opacity:0;
      -moz-transform:scale(0);
      transform:scale(0)
    }
  }
  @-o-keyframes ball-spin-clockwise{
    0%,100%{
      opacity:1;
      -o-transform:scale(1);
      transform:scale(1)
    }
    20%{
      opacity:1
    }
    80%{
      opacity:0;
      -o-transform:scale(0);
      transform:scale(0)
    }
  }
  @keyframes ball-spin-clockwise{
    0%,100%{
      opacity:1;
      -webkit-transform:scale(1);
      -moz-transform:scale(1);
      -o-transform:scale(1);
      transform:scale(1)
    }
    20%{
      opacity:1
    }
    80%{
      opacity:0;
      -webkit-transform:scale(0);
      -moz-transform:scale(0);
      -o-transform:scale(0);transform:scale(0)
    }
  }
</style>

2 再utils下面tools.js

class Msg {
  static loading() {
    document.querySelector('.loading-page').style.display = 'block';
  }
 
  static hideLoading() {
    document.querySelector('.loading-page').style.display = 'none';
  }
}
 
export {
  Tools,
  Msg
}

3 再utils下面建議一個request.js 封裝的axios請求

import axios from 'axios'
import qs from 'qs'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import router from '@/router'
import {Msg} from '@/utils/tools';
import { removeToken } from '@/utils/auth'
 
var allResquest = 0;
// create an axios instance
const service = axios.create({
    baseURL: process.env.VUE_APP_BASE_API, // api 的 base_url
    withCredentials: true, // 跨域請求時傳送 cookies
    paramsSerializer: params => { // 查詢字串中的陣列不使用方括號
			return qs.stringify(params, { indices: false })
		},
    timeout: 15000 // request timeout
})
 
// request interceptor
service.interceptors.request.use(
    config => {
      if (store.getters.token) {
            config.headers['Authorization'] = 'Bearer ' + getToken()
            config.headers['filterMode'] = localStorage.getItem('dataType')
        }
      config.headers['project'] = "csr"
      allResquest = allResquest + 1;
      if (config.mask !== true)  {
        Msg.loading()
      }
      return config
    },
    error => {
        return Promise.reject(error)
    }
)
 
// response interceptor
service.interceptors.response.use(
    /**
     * If you want to get information such as headers or status
     * Please return  response => response
     */
    /**
     * 下面的註釋為通過在response裡，自定義code來標示請求狀態
     * 當code返回如下情況則說明許可權有問題，登出並返回到登入頁
     * 如想通過 XMLHttpRequest 來狀態碼標識 邏輯可寫在下面error中
     * 以下程式碼均為樣例，請結合自生需求加以修改，若不需要，則可刪除
     */
    response => {
        allResquest = allResquest - 1;
        const res = response.data;
        if (response.status === 200) {
          if (allResquest === 0) {
            Msg.hideLoading();
          }
            // 50008 系統無此賬號
            // 50010 賬號禁用
            // 50012 賬號或密碼錯誤
            // 50013 主賬號被禁用，禁止登入
            // 50014 token失效
            // 50015 登入失敗，無操作許可權，請聯絡系統管理員!
            // 50016 驗證碼錯誤
            // 429   限流 伺服器擁擠，請稍後再試
            // -999  未知錯誤
            // 403  無許可權
            if (res.code === 50008 || res.code === 50010 || res.code === 50012 || res.code === 50013 ||
              res.code === 50016 || res.code === 50015 || res.code === 429 || res.code === -999 || res.code === 403 || res.code === 500) {
                Message({
                    message: res.msg || 'error',
                    type: 'error',
                    duration: 5 * 1000,
                    offset: 0
                })
              return Promise.reject(res.msg || 'error')
            } else if (res.code === 50014) {
              if (store.getters.token) {
                removeToken()
              }
              MessageBox.alert( res.msg,'錯誤提示', {
                confirmButtonText: '確定',
                callback: action => {
                  store.dispatch('logout')
                  router.push(`/login`)
                }
              })
              return false
            }
            return res
        }
    },
    error => {
        allResquest = allResquest - 1;
        Msg.hideLoading();
        Message({
            message: '服務擁擠，請稍後重試！',
            type: 'error',
            duration: 5 * 1000
        })
        return Promise.reject(error)
    }
)
export default service

4 修改app.vue

<template>
  <div id="app">
    <router-view />
    <Spinner></Spinner>
  </div>
</template>

<script>
import Spinner from '@/components/Spinner'
export default {
  name: 'App',
  components: {
    Spinner
  }
}
</script>

<style>
</style>

以上為個人經驗，希望能給大家一個參考，也希望大家多多支援it145.com。