CSS3 - 对过渡（transition）进行调速，以及延时
作者：互联网
1，使用调速函数控制过渡效果的速度曲线（加速，减速等）
使用调速函数可以设置过渡效果的速度曲线，从而实现过渡效果随着时间来改变其速度。比如：开始很慢然后加速或者开始很快然后减速。
（1）CSS3定义了如下的调速函数：
ease 规定慢速开始，然后变快，然后慢速结束的过渡效果（cubic-bezier(0.25,0.1,0.25,1)）。
ease-in 规定以慢速开始的过渡效果（等于 cubic-bezier(0.42,0,1,1)）。
ease-out 规定以慢速结束的过渡效果（等于 cubic-bezier(0,0,0.58,1)）。
ease-in-out 规定以慢速开始和结束的过渡效果（等于 cubic-bezier(0.42,0,0.58,1)）。
cubic-bezier(n,n,n,n) 在 cubic-bezier 函数中定义自己的值。可能的值是 0 至 1 之间的数值。
（2）调速函数的使用
使用时只需要把调速函数跟在过渡属性的时间参数后面。如果不填的话则使用默认调速函数（ease）
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transition: opacity 10s ease-in-out;
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（3）使用样例1：
下面通过样例演示各种调速函数的效果区别。鼠标移入方框，方框内的方块会向右移动，同时方块会旋转，边角变圆角，背景色和文字颜色也在改变。这些样式的改变都会有过渡效果，同时由于使用不同的调速函数，过渡的快慢也是有区别的。
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<!doctype html>
<html lang="en">
<head>
<title>hangge.com</title>
<style>
.trans_box {
padding: 20px;
*zoom:1;
}
.trans_list {
width: 10%;
height: 64px;
margin:10px 0;
color:#fff;
text-align:center;
}
.linear {
-webkit-transition: all 4s linear;
-moz-transition: all 4s linear;
-o-transition: all 4s linear;
transition: all 4s linear;
}
.ease {
-webkit-transition: all 4s ease;
-moz-transition: all 4s ease;
-o-transition: all 4s ease;
transition: all 4s ease;
}
.ease_in {
-webkit-transition: all 4s ease-in;
-moz-transition: all 4s ease-in;
-o-transition: all 4s ease-in;
transition: all 4s ease-in;
}
.ease_out {
-webkit-transition: all 4s ease-out;
-moz-transition: all 4s ease-out;
-o-transition: all 4s ease-out;
transition: all 4s ease-out;
}
.ease_in_out {
-webkit-transition: all 4s ease-in-out;
-moz-transition: all 4s ease-in-out;
-o-transition: all 4s ease-in-out;
transition: all 4s ease-in-out;
}
.trans_box:hover .trans_list, .trans_box_hover .trans_list {
margin-left:89%;
color:#333;
-webkit-border-radius:25px;
-moz-border-radius:25px;
-o-border-radius:25px;
border-radius:25px;
-webkit-transform: rotate(360deg);
-moz-transform: rotate(360deg);
-o-transform: rotate(360deg);
transform: rotate(360deg);
}
</style>
</head>
<div id="transBox" class="trans_box">
<div class="trans_list ease">ease<br>(default)</div>
<div class="trans_list ease_in">ease-in</div>
<div class="trans_list ease_out">ease-out</div>
<div class="trans_list ease_in_out">ease-in-out</div>
<div class="trans_list linear">linear</div>
</div>
</html>
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（4）使用样例2：
下面通过对柱状图的宽度改变过渡，演示不同调速函数的效果区别。
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<!DOCTYPE html>
<html>
<head>
<style>
div
{
margin:10px 0;
width:100px;
height:50px;
background:#2D9900;
color:white;
font-weight:bold;
transition:width 2s;
-moz-transition:width 2s; /* Firefox 4 */
-webkit-transition:width 2s; /* Safari and Chrome */
-o-transition:width 2s; /* Opera */
}
#div1 {transition-timing-function: linear;}
#div2 {transition-timing-function: ease;}
#div3 {transition-timing-function: ease-in;}
#div4 {transition-timing-function: ease-out;}
#div5 {transition-timing-function: ease-in-out;}
/* Firefox 4: */
#div1 {-moz-transition-timing-function: linear;}
#div2 {-moz-transition-timing-function: ease;}
#div3 {-moz-transition-timing-function: ease-in;}
#div4 {-moz-transition-timing-function: ease-out;}
#div5 {-moz-transition-timing-function: ease-in-out;}
/* Safari and Chrome: */
#div1 {-webkit-transition-timing-function: linear;}
#div2 {-webkit-transition-timing-function: ease;}
#div3 {-webkit-transition-timing-function: ease-in;}
#div4 {-webkit-transition-timing-function: ease-out;}
#div5 {-webkit-transition-timing-function: ease-in-out;}
/* Opera: */
#div1 {-o-transition-timing-function: linear;}
#div2 {-o-transition-timing-function: ease;}
#div3 {-o-transition-timing-function: ease-in;}
#div4 {-o-transition-timing-function: ease-out;}
#div5 {-o-transition-timing-function: ease-in-out;}
.trans_box:hover div
{
width:500px;
}
</style>
</head>
<body>
<div id="transBox" class="trans_box">
<div id="div2" style="top:150px">ease<br>(default)</div>
<div id="div3" style="top:200px">ease-in</div>
<div id="div4" style="top:250px">ease-out</div>
<div id="div5" style="top:300px">ease-in-out</div>
<div id="div1" style="top:100px">linear</div>
</div>
</body>
</html>
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2，为过渡增加延时
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<!doctype html>
<html lang="en">
<head>
<title>hangge.com</title>
<style>
.trans_box3 {
padding: 20px;
*zoom:1;
}
.trans_box3 div{
width:100px;
height:50px;
background:#2D9900;
color:white;
font-weight:bold;
-webkit-transition: all 2s ease-out 1s;
-moz-transition: all 2s ease-out 1s;
-o-transition: all 2s ease-out 1s;
transition: all 2s ease-out 1s;
}
.trans_box3:hover div
{
width:500px;
}
</style>
</head>
<div class="trans_box3">
<div>延时1秒</div>
</div>
</html>
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原文出自：www.hangge.com 转载请保留原文链接：https://www.hangge.com/blog/cache/detail_988.html
标签：CSS3,function,ease,transition,调速,timing,div,out 来源： https://www.cnblogs.com/rita-hu/p/11762804.html