CSS3动画属性并不是很多，重点是你怎样把它运用起来并且运用好，从简单的hover状态或复杂的小动画，都可以巧妙的用CSS3动画属性来实现。
本文想和大家分享一个比较有创意、实用的CSS天气图标动画，静态的天气图标看上去是很呆板，若加上动画，看起来会更加真实生动，以下例子就是很好的参考案例。
下面我们来做一个会下雨的天气图标实例，过程其实很简单哦。
STEP1: 整体HTML架构 <div class="icon rainy"><div class="cloud"></div><div class="rain"></div></div> STEP2: 用CSS绘制云朵图标 CSS代码如下 body {max-width: 42em;padding: 2em;margin: 0 auto;color: #161616;font-family: 'Roboto', sans-serif;text-align: center;background-color: currentColor;}.icon {position: relative;display: inline-block;width: 12em;height: 10em;font-size: 1em; /* control icon size here */}.cloud {position: absolute;z-index: 1;top: 50%;left: 50%;width: 3.6875em;height: 3.6875em;margin: -1.84375em;background: currentColor;border-radius: 50%;box-shadow:-2.1875em 0.6875em 0 -0.6875em,2.0625em 0.9375em 0 -0.9375em,0 0 0 0.375em #fff,-2.1875em 0.6875em 0 -0.3125em #fff,2.0625em 0.9375em 0 -0.5625em #fff;}.cloud:after {content: '';position: absolute;bottom: 0;left: -0.5em;display: block;width: 4.5625em;height: 1em;background: currentColor;box-shadow: 0 0.4375em 0 -0.0625em #fff;}.cloud:nth-child(2) {z-index: 0;background: #fff;box-shadow:-2.1875em 0.6875em 0 -0.6875em #fff,2.0625em 0.9375em 0 -0.9375em #fff,0 0 0 0.375em #fff,-2.1875em 0.6875em 0 -0.3125em #fff,2.0625em 0.9375em 0 -0.5625em #fff;opacity: 0.3;transform: scale(0.5) translate(6em, -3em);animation: cloud 4s linear infinite;}.cloud:nth-child(2):after { background: #fff; }.rain{position: absolute;z-index: 2;top: 50%;left: 50%;width: 3.75em;height: 3.75em;margin: 0.375em 0 0 -2em;background: currentColor;}.rain:after {content: '';position: absolute;z-index: 2;top: 50%;left: 50%;width: 1.125em;height: 1.125em;margin: -1em 0 0 -0.25em;background: #0cf;border-radius: 100% 0 60% 50% / 60% 0 100% 50%;box-shadow:0.625em 0.875em 0 -0.125em rgba(255,255,255,0.2),-0.875em 1.125em 0 -0.125em rgba(255,255,255,0.2),-1.375em -0.125em 0 rgba(255,255,255,0.2);transform: rotate(-28deg);animation: rain 3s linear infinite; /*设置动画 rain */}STEP3: 下雨动画 /* 下雨动画 Animations */ @keyframes rain {0% {background: #0cf;box-shadow:0.625em 0.875em 0 -0.125em rgba(255,255,255,0.2),-0.875em 1.125em 0 -0.125em rgba(255,255,255,0.2),-1.375em -0.125em 0 #0cf;}25% {box-shadow:0.625em 0.875em 0 -0.125em rgba(255,255,255,0.2),-0.875em 1.125em 0 -0.125em #0cf,-1.375em -0.125em 0 rgba(255,255,255,0.2);}50% {background: rgba(255,255,255,0.3);box-shadow:0.625em 0.875em 0 -0.125em #0cf,-0.875em 1.125em 0 -0.125em rgba(255,255,255,0.2),-1.375em -0.125em 0 rgba(255,255,255,0.2);}100% {box-shadow:0.625em 0.875em 0 -0.125em rgba(255,255,255,0.2),-0.875em 1.125em 0 -0.125em rgba(255,255,255,0.2),-1.375em -0.125em 0 #0cf;}}最后效果：
如果想看其它天气动画图标的代码，请查看以下网址。 在线演示地址&源码：http://codepen.io/joshbader/pen/EjXgqr
来源：http://www.shejidaren.com/animated-weather-icon.html |
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