之前的文章《手把手教你使用css制作逼真的水波纹效果（附代码）》中，给大家介绍了怎么使用css制作逼真的水波纹效果。下面本篇文章给大家介绍如何用css3制作爱心加载，我们一起看看怎么做。
网页中常常有这样的css3爱心加载，给大家分享一下看效果图看完效果，我们来研究一下是怎么实现呢，给大家用于讲解html+css图片文字排版的基本流程。
效果大概长这样
1、首先html创建新文件，定义9个div标签。
<div class="header-0"></div> <div class="header-1"></div> <div class="header-2"></div> <div class="header-3"></div> <div class="header-4"></div> <div class="header-5"></div> <div class="header-6"></div> <div class="header-7"></div> <div class="header-8"></div>
2、开始定义css样式来进行修饰添加background-color属性设置背景颜色，宽度设置为100%，高度设置为100%，margin属性设置所有外边距属性。
body { width: 100%; height: 100%; margin: 0; background-color: #ccc; }
3、container标题文本样式，利用align-items属性居中对齐。
.container { display: flex; width: 100%; height: 100%; justify-content: center; align-items: center;
4、header标题文本样式，利用position属性指定一个元素定位。
.header { position: relative; width: 138px; /* display: flex; */
5、class*='header-'标题文本样式，利用position属性定位元素，语法“position: absolute;top: -5px;border-radius: 5px”生成绝对定位的元素。
[class*='header-']{ position: absolute; width: 10px; height: 10px; top: -5px; border-radius: 5px; }
6、header0-8标题文本样式，利用animation（动画）属性绑定到每8个元素，让元素摆动起来。
.header-0, .header-8 { animation: header-0 3.2s infinite; } .header-1, .header-7 { animation: header-1 3.2s infinite; } .header-2, .header-6 { animation: header-2 3.2s infinite; } .header-3, .header-5 { animation: header-3 3.2s infinite; } .header-4 { animation: header-4 3.2s infinite; }
7、使用4个@keyframes规则，给4个创建动画逐步改变0％是开头动画，100％。
@keyframes header-0 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 30px; top: -10px; }}@keyframes header-1 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 60px; top: -31px; }}@keyframes header-2 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 80px; top: -37px; }}@keyframes header-3 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 90px; top: -31px; }}@keyframes header-4 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 94px; top: -23px; }
8、header0-8标题文本样式添加animation-delay属性等待1秒然后开始动画，background属性设置颜色绑定8个元素。
.header-0 { left: 0; animation-delay: 0s; background: #92fe9d;}.header-1 { left: 16px; animation-delay: 0.15s; background: #00c9ff;}.header-2 { left: 32px; animation-delay: 0.3s; background: #ff758c;}.header-3 { left: 48px; animation-delay: 0.45s; background: #ff7eb3;}.header-4 { left: 66px; animation-delay: 0.6s; background: #fa71cd;}.header-5 { left: 82px; animation-delay: 0.75s; background: #6f86d6;}.header-6 { left: 98px; animation-delay: 0.9s; background: #f9f586;}.header-7 { left: 114px; animation-delay: 1.05s; background: #b1f4cf;}.header-8 { left: 130px; animation-delay: 1.2s; background: #fef9d7;}
代码效果出来了
下面完整代码
<!doctype html><html><head> <meta charset="utf-8"> <title>爱心加载</title> <style> html,body { width: 100%; height: 100%; margin: 0; background-color: #ccc; } .container { display: flex; width: 100%; height: 100%; justify-content: center; align-items: center; } .header { position: relative; width: 138px; /* display: flex; */ } [class*='header-']{ position: absolute; width: 10px; height: 10px; top: -5px; border-radius: 5px; } .header-0, .header-8 { animation: header-0 3.2s infinite; } .header-1, .header-7 { animation: header-1 3.2s infinite; } .header-2, .header-6 { animation: header-2 3.2s infinite; } .header-3, .header-5 { animation: header-3 3.2s infinite; } .header-4 { animation: header-4 3.2s infinite; }@keyframes header-0 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 30px; top: -10px; }}@keyframes header-1 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 60px; top: -31px; }}@keyframes header-2 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 80px; top: -37px; }}@keyframes header-3 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 90px; top: -31px; }}@keyframes header-4 { 0%, 10%, 90%, 100% { height: 10px; top: -5px; } 45%, 55% { height: 94px; top: -23px; }}.header-0 { left: 0; animation-delay: 0s; background: #92fe9d;}.header-1 { left: 16px; animation-delay: 0.15s; background: #00c9ff;}.header-2 { left: 32px; animation-delay: 0.3s; background: #ff758c;}.header-3 { left: 48px; animation-delay: 0.45s; background: #ff7eb3;}.header-4 { left: 66px; animation-delay: 0.6s; background: #fa71cd;}.header-5 { left: 82px; animation-delay: 0.75s; background: #6f86d6;}.header-6 { left: 98px; animation-delay: 0.9s; background: #f9f586;}.header-7 { left: 114px; animation-delay: 1.05s; background: #b1f4cf;}.header-8 { left: 130px; animation-delay: 1.2s; background: #fef9d7;} </style></head><body> <div class="container"> <div class="header"> <div class="header-0"></div> <div class="header-1"></div> <div class="header-2"></div> <div class="header-3"></div> <div class="header-4"></div> <div class="header-5"></div> <div class="header-6"></div> <div class="header-7"></div> <div class="header-8"></div> </div> </div></body></html>
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