前言
通知！通知！，去我的首页转发“抽奖活动” 可以参与抽奖（一块抖音网红手表）哦。
前面文章《CSS3线性渐变、阴影、缩放实现动画下雨效果》实现了下雨的动画效果，现在我们来绘制更多天气相关的动态图标。
上图6种天气，我们就分开一一展示给小伙伴们，希望能给大家带来帮助。
晴朗
<div class="icon sunny"> <div class="sun"> <div class="rays"></div> </div> </div>
sun标签绘制圆环，rays及其伪类绘制射线，然后添加动画，其实旋转。
body {
background-color: currentColor;
}
.sun {
width: 2.5em;
height: 2.5em;
margin: -1.25em;
background: currentColor;
border-radius: 50%;
box-shadow: 0 0 0 0.375em orange;
animation: spin 12s infinite linear;
}
.rays {
position: absolute;
top: -2em;
left: 50%;
display: block;
width: 0.375em;
height: 1.125em;
margin-left: -0.1875em;
background: yellow;
border-radius: 0.25em;
box-shadow: 0 5.375em yellow;
}
.rays:before, .rays:after {
content: '';
position: absolute;
top: 0em;
left: 0em;
display: block;
width: 0.375em;
height: 1.125em;
transform: rotate(60deg);
transform-origin: 50% 3.25em;
background: yellow;
border-radius: 0.25em;
box-shadow: 0 5.375em yellow;
}
.rays:before {
transform: rotate(120deg);
}
@keyframes spin {
100% {
transform: rotate(360deg);
}
}
下雨
<div class="icon rainy"> <div class="cloud"></div> <div class="rain"></div> </div>
添加样式
body {
background-color: currentColor;
}
.cloud {
position: absolute;
z-index: 1;
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 lightgray,
-2.1875em 0.6875em 0 -0.3125em lightgray,
2.0625em 0.9375em 0 -0.5625em lightgray;
}
这朵云是不是怪怪的，下边应该是平整的，所以添加样式。
.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 lightgray;
}
这里绘制云，和《CSS3线性渐变、阴影、缩放实现动画下雨效果》一样的，都是用box-shadow阴影来制作的。
然后我们加入雨滴
...
.rain{
position: absolute;
z-index: 2;
top: 50%;
left: 20%;
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;
}
@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;
}
}
还有人记得《CSS3绘制一个小雨滴，见证它的成长之路》，其实很多东西都是一点点积累的过程，慢慢的拼凑，会得到不一样的东西。
如果你对box-shadow动画还不是很熟悉的，可以看这里《CSS3 box-shadow实现背景动画》
多云
多云，这个云前面已经制作了，接下来就非常的简单。
<div class="icon cloudy"> <div class="cloud"></div> <div class="cloud"></div> </div>
这里两朵云，前面的是静止的，后面的是动态的。
body {
background-color: currentColor;
}
.cloudy {
position: absolute;
}
.cloud {
position: absolute;
z-index: 1;
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 lightgray,
-2.1875em 0.6875em 0 -0.3125em lightgray,
2.0625em 0.9375em 0 -0.5625em lightgray;
}
.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 lightgray;
}
.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;
}
@keyframes cloud {
0% {
opacity: 0;
}
50% {
opacity: 0.3;
}
100% {
opacity: 0;
transform:
scale(0.5) translate(-200%, -3em);
}
}
下雪
“北国风光，千里冰封，万里雪飘。...一代天骄，成吉思汗，只识弯弓射大雕。俱往矣，数风流人物，还看今朝。”，一提到雪，顿时想起毛爷爷的《沁园春·雪》，豪情万丈啊。继续正题。
<div class="icon flurries"> <div class="cloud"></div> <div class="snow"> <div class="flake"></div> <div class="flake"></div> </div> </div>
添加样式
body {
color: #161616;
font-family: 'Roboto', sans-serif;
background-color: currentColor;
}
.flurries {
position: absolute;
top: 50%;
left: 55%;
}
.snow {
position: absolute;
z-index: 2;
top: 50%;
left: 20%;
width: 3.75em;
height: 3.75em;
margin: 0.375em 0 0 -2em;
background: currentColor;
}
.cloud {
position: absolute;
z-index: 1;
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 lightgray,
-2.1875em 0.6875em 0 -0.3125em lightgray,
2.0625em 0.9375em 0 -0.5625em lightgray;
}
.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 lightgray;
}
.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;
}
.flake:before,
.flake:after {
content: '\\2745';
position: absolute;
top: 50%;
left: 50%;
margin: -1.025em 0 0 -1.0125em;
color: #fff;
list-height: 1em;
opacity: 0.2;
animation: spin 8s linear infinite reverse;
}
.flake:after {
margin: 0.125em 0 0 -1em;
font-size: 1.5em;
opacity: 0.4;
animation: spin 14s linear infinite;
}
.flake:nth-child(2):before {
margin: -0.5em 0 0 0.25em;
font-size: 1.25em;
opacity: 0.2;
animation: spin 10s linear infinite;
}
.flake:nth-child(2):after {
margin: 0.375em 0 0 0.125em;
font-size: 2em;
opacity: 0.4;
animation: spin 16s linear infinite reverse;
}
@keyframes spin {
100% {
transform: rotate(360deg);
}
}
这里云依旧，雪花采用字体图片形式，用font-family:'Roboto', sans-serif;,content: '\2745';即可出现雪花。旋转动画和太阳旋转动画一样。
雷电
<div class="icon thunder-storm"> <div class="cloud"></div> <div class="lightning"> <div class="bolt"></div> <div class="bolt"></div> </div> </div>
把cloud的样式复制下来，制作闪电lightning就可以了。
body {
background-color: currentColor;
}
.thunder-storm {
position: absolute;
}
.cloud{
...
}
...
...
.lightning{
position: absolute;
z-index: 2;
top: 50%;
left: 20%;
width: 3.75em;
height: 3.75em;
margin: 0.375em 0 0 -2em;
background: currentColor;
}
.bolt {
position: absolute;
top: 50%;
left: 50%;
margin: -0.25em 0 0 -0.125em;
color: #fff;
opacity: 0.3;
-webkit-animation: lightning 2s linear infinite;
animation: lightning 2s linear infinite;
}
.bolt:nth-child(2) {
width: 0.5em;
height: 0.25em;
margin: -1.75em 0 0 -1.875em;
transform: translate(2.5em, 2.25em);
opacity: 0.2;
animation: lightning 1.5s linear infinite;
}
.bolt:before,
.bolt:after {
content: '';
position: absolute;
z-index: 2;
top: 50%;
left: 50%;
margin: -1.625em 0 0 -1.0125em;
border-top: 1.25em solid transparent;
border-right: 0.75em solid;
border-bottom: 0.75em solid;
border-left: 0.5em solid transparent;
transform: skewX(-10deg);
}
.bolt:after {
margin: -0.25em 0 0 -0.25em;
border-top: 0.75em solid;
border-right: 0.5em solid transparent;
border-bottom: 1.25em solid transparent;
border-left: 0.75em solid;
transform: skewX(-10deg);
}
.bolt:nth-child(2):before {
margin: -0.75em 0 0 -0.5em;
border-top: 0.625em solid transparent;
border-right: 0.375em solid;
border-bottom: 0.375em solid;
border-left: 0.25em solid transparent;
}
.bolt:nth-child(2):after {
margin: -0.125em 0 0 -0.125em;
border-top: 0.375em solid;
border-right: 0.25em solid transparent;
border-bottom: 0.625em solid transparent;
border-left: 0.375em solid;
}
@keyframes lightning {
45% {
color: #fff;
background: #fff;
opacity: 0.2;
}
50% {
color: #0cf;
background: #0cf;
opacity: 1;
}
55% {
color: #fff;
background: #fff;
opacity: 0.2;
}
}
雨转晴
最后的雨转晴也就超级简单了，把太阳和下雨天合并到一起就可以了。
<div class="icon sun-shower"> <div class="cloud"></div> <div class="sun"> <div class="rays"></div> </div> <div class="rain"></div> </div>
样式上面添加一点点错位就可以了。其余的云，雨样式直接复用上面的即可。
...
.cloud + .sun {
margin: -2em 1em;
}
...
并且通过这个例子，我们可以引申很多天气出来，多云转雨、雷雨、雨夹雪等等。
演示地址：css3简易的天气图标动画特效 - Javan的学习之旅
