在页面没有响应时,展示加载动画是一种对用户友好的表现,不至于白屏,等响应内容渲染到页面时再移除动画
先放loading效果图
原理:伪类+动画,下面是步骤图,贴上助于理解,加载动画本质是设置一个定宽定高的正方形,border-radius: 50%;使其成为圆形,再给该div3px的边框并设为透明,然后在单独设置上边框为白色,用::before,::after伪类absolute定位并进行同样设置,不同之处是依次增大留出的间隙,以及动画执行时间变长和设置延迟,这样就能形成圆圈不同快慢的旋转
完整代码:
components文件夹下loading.vue
<template> <div id="loader_wrapper"> <div id="loader"></div> <div class="load_title">正在加载,请稍等......</div> </div> </template> <script> export default{ name:"loading", } </script> <style scoped> #loader_wrapper{ position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 99; background: rgba(0, 0, 0,.8); background-size: 100% 100%; } #loader{ display: block; position: relative; left: 50%; top: 50%; width: 300px; height: 300px; /* background: red; */ margin: -150px 0 0 -150px; border-radius: 50%; border: 3px solid transparent; border-top-color: #fff; -webkit-animation: spin 5s linear infinite; -ms-animation: spin 5s linear infinite; -moz-animation: spin 5s linear infinite; -o-animation : spin 5s linear infinite; animation:spin 5s linear infinite; z-index: 1001; } #loader:before{ content:""; position: absolute; top: 5px; left: 5px; right: 5px; bottom: 5px; border-radius: 50%; /* background: green; */ border: 3px solid transparent; border-top-color: #fff; -webkit-animation: spin 8s linear infinite; -ms-animation: spin 8s linear infinite; -moz-animation: spin 8s linear infinite; -o-animation : spin 8s linear infinite; animation:spin 8s linear infinite; } #loader:after{ content:""; position: absolute; top: 15px; left: 15px; right: 15px; bottom: 15px; border-radius: 50%; /* background: yellow; */ border: 3px solid transparent; border-top-color: #fff; -webkit-animation: spin 8s linear 1s infinite; -ms-animation: spin 8s linear 1s infinite; -moz-animation: spin 8s linear 1s infinite; -o-animation : spin 8s linear 1s infinite; animation:spin 8s linear 1s infinite; } @-webkit-keyframes spin { 0%{ -webkit-transform: rotate(0deg); -ms-transform: rotate(0deg); transform:rotate(0deg); } 100%{ -webkit-transform: rotate(360deg); -ms-transform: rotate(360deg); transform: rotate(360deg); } } @keyframes spin{ 0%{ -webkit-transform: rotate(0deg); -ms-transform: rotate(0deg); transform:rotate(0deg); } 100%{ -webkit-transform: rotate(360deg); -ms-transform: rotate(360deg); transform: rotate(360deg); } } #loader_wrapper .load_title{ font-family: "Open Sans"; color:#fff; font-size: .3rem; width: 100%; text-align: center; z-index: 9999; position: absolute; top: 70%; opacity: 1; line-height: .3rem; } </style>
在cs.vue页面中引入并注册loading
cs.vue
<template> <div class="main"> <loading v-if="!initFlag"></loading> 111 </div> </template> <script> import loading from "../components/loading" export default { name:"tranin", data () { return{ initFlag:false,//初始化全局数据的请求 false表示请求失败 } }, components:{ loading, } } </script>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持NICE源码。