前言
有需求,就要动手丰衣足食...公司考虑兼容IE9,那么css3 animation写的loading就无缘了。
因为keyframes IE10+ , 那么要实现会动且可控的(颜色,大小),好像就剩下svg大佬了;
效果图
先说说实现的思路
- 一个遮罩层,一个显示loading...通用法则
- svg动效的loading直接git上找,一搜一大堆;(会写动效svg的小伙伴赞一个,我没时间研究这个)
- 遮罩层有两种情况下,一个是全局
fixed,一个是相对relative的absolute,所以这块抽离 - svg要可控颜色大小,那么必须是
svg代码渲染,图片引入是没法更改的
你能学到什么?
props的字段限制,默认值computed的运用- 部分webpack配置的改动
svg一丢丢知识
大体就这样了,再来说说爬的坑
svg可以继承颜色和大小(css),前提哈,svg内置代码没有fill(填充的颜色),width,height,所以要删除掉那三个属性, 上码
// 记得删除,一般用软件生成的svg导出都有带这些属性,删除后默认为黑色 <svg class="icon-loading" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" width="32" height="32" fill="red"> <path transform="translate(-8 0)" d="M4 12 A4 4 0 0 0 4 20 A4 4 0 0 0 4 12"> <animateTransform attributeName="transform" type="translate" values="-8 0; 2 0; 2 0;" dur="0.8s" repeatCount="indefinite" begin="0" keytimes="0;.25;1" keySplines="0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8" calcMode="spline" /> </path> <path transform="translate(2 0)" d="M4 12 A4 4 0 0 0 4 20 A4 4 0 0 0 4 12"> <animateTransform attributeName="transform" type="translate" values="2 0; 12 0; 12 0;" dur="0.8s" repeatCount="indefinite" begin="0" keytimes="0;.35;1" keySplines="0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8" calcMode="spline" /> </path> <path transform="translate(12 0)" d="M4 12 A4 4 0 0 0 4 20 A4 4 0 0 0 4 12"> <animateTransform attributeName="transform" type="translate" values="12 0; 22 0; 22 0;" dur="0.8s" repeatCount="indefinite" begin="0" keytimes="0;.45;1" keySplines="0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8" calcMode="spline" /> </path> <path transform="translate(24 0)" d="M4 12 A4 4 0 0 0 4 20 A4 4 0 0 0 4 12"> <animateTransform attributeName="transform" type="translate" values="22 0; 32 0; 32 0;" dur="0.8s" repeatCount="indefinite" begin="0" keytimes="0;.55;1" keySplines="0.2 0.2 0.4 0.8;0.2 0.6 0.4 0.8" calcMode="spline" /> </path> </svg>
- webpack你若是配置url-loader , 比如
vue-cli默认的配置写了会把svg转为base64, 解决方案是拆开,引入一个raw-loader,可以保证svg代码不会转化为url或者base64,上码
{ test: /\.(png|jpe?g|gif)(\?.*)?$/, loader: "url-loader", options: { limit: 10000, name: utils.assetsPath("img/[name].[hash:7].[ext]") } }, { test: /\.(svg)(\?.*)?$/, loader: "raw-loader", }
有什么特性!
svg大小,颜色,类型可控- 遮罩层的样式可控
代码
index.js -- 先把svg默认全部导出
// 引入所有svg loading export { default as balls } from "./loading-balls.svg"; export { default as bars } from "./loading-bars.svg"; export { default as bubbles } from "./loading-bubbles.svg"; export { default as cubes } from "./loading-cubes.svg"; export { default as cylong } from "./loading-cylon.svg"; export { default as cylongred } from "./loading-cylon-red.svg"; export { default as spin } from "./loading-spin.svg"; export { default as spinning } from "./loading-spinning-bubbles.svg"; export { default as spokes } from "./loading-spokes.svg";
loading.vue
<template> <div class="loading-layout" :style="layoutLoadingStyle"> <div class="loading"> <p v-html="svgShow" :style="svgStyle"></p> <p class="loadingText" :style="{color:svgColor}" v-if="showText">{{loadingText}}</p> </div> </div> </template> <script> // 引入所有svg loading import * as allsvg from './svg'; export default { name: 'loading', data: function () { return {} }, props: { svgType: { type: String, // 字符串类型 default: 'bars' // 默认的loading图形 }, svgColor: { type: String, default: '#20a0ff' }, svgSize: { type: Object, // 对象类型 default: function () { return { width: '50px', height: '50px' } } }, showText:{ // 是否显示loading文本 type: Boolean, default:false, }, loadingText: { type: String, default: '拼命加载中....' }, lbgColor: { // loading包裹层的样式 type: Object, default: function () { return { color: 'rgba(255,255,255,.5)' } } }, lsize: { type: Object, // 对象类型 default: function () { return { width: '100%', height: '100%' } } }, lpos: { type: Object, default: function () { return { // 遮罩层初始化位置 position: 'absolute', top: '0', left: '0' } } } }, computed: { svgShow () { return allsvg[this.svgType]; }, svgStyle () { return { fill: this.svgColor, width: this.svgSize.width, height: this.svgSize.height } }, layoutLoadingStyle () { return { position: this.lpos.position, top: this.lpos.top, left: this.lpos.left, width: this.lsize.width, height: this.lsize.height, 'background-color': this.lbgColor.color } } } } </script> <style scoped lang="scss"> .loading-layout { position: relative; height: 100%; width: 100%; z-index: 2001; .loading { position: absolute; top: 50%; left: 45%; transform: translate(-50%, -50%); text-align: center; p { margin: 0 auto; } svg { fill: inherit; height: inherit; width: inherit; } } .loadingText { white-space: nowrap; } } </style>
