CSS3过渡 transition-timing-function属性

三、transition-timing-function:

语法:

 transition-timing-function : ease | linear | ease-in | ease-out | ease-in-out | cubic-bezier(<number>, <number>, <number>, <number>) [, ease | linear | ease-in | ease-out | ease-in-out | cubic-bezier(<number>, <number>, <number>, <number>)]*

 

取值:

transition-timing-function的值允许你根据时间的推进去改变属性值的变换速率,transition-timing-function有6个可能值:

1、ease:(逐渐变慢)默认值,ease函数等同于贝塞尔曲线(0.25, 0.1, 0.25, 1.0).

2、linear:(匀速),linear 函数等同于贝塞尔曲线(0.0, 0.0, 1.0, 1.0).

3、ease-in:(加速),ease-in 函数等同于贝塞尔曲线(0.42, 0, 1.0, 1.0).

4、ease-out:(减速),ease-out 函数等同于贝塞尔曲线(0, 0, 0.58, 1.0).

5、ease-in-out:(加速然后减速),ease-in-out 函数等同于贝塞尔曲线(0.42, 0, 0.58, 1.0)

6、cubic-bezier:(该值允许你去自定义一个时间曲线), 特定的cubic-bezier曲线。 (x1, y1, x2, y2)四个值特定于曲线上点P1和点P2。所有值需在[0, 1]区域内,否则无效。

其是cubic-bezier为通过贝赛尔曲线来计算“转换”过程中的属性值,如下曲线所示,通过改变P1(x1, y1)和P2(x2, y2)的坐标可以改变整个过程的Output Percentage。初始默认值为default.

cubic-bezier.png


其他几个属性的示意图:


transition-timing-function.png

代码实例:

<!DOCTYPE html> 
<html> 
<head> 
<meta charset=" utf-8"> 
<meta name="author" content="http://www.php.cn/" /> 
<title>php中文网</title> 
<style> 
#thediv{
  width:100px;
  height:100px;
  background:blue;
   
  transition-property:width,height;
  -moz-transition-property:width,height;
  -webkit-transition-property:width,height;
  -o-transition-property:width,height;
   
  transition-duration:2s,6s;
  -moz-transition-duration:2s,6s;
  -webkit-transition-duration:2s,6s;
  -o-transition-duration:2s,6s;
   
  transition-timing-function:ease-in,linear;
  -moz-transition-timing-function:ease-in,linear;
  -webkit-transition-timing-function:ease-in,linear;
  -o-transition-timing-function:ease-in,linear;
}
#thediv:hover{
  width:500px;
  height:200px;
}
</style>
</head>
<body>
<div id="thediv"></div>
</body>
</html>


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||
<!DOCTYPE html> <html> <head> <meta charset=" utf-8"> <meta name="author" content="http://www.php.cn/" /> <title>php中文网</title> <style> #thediv{ width:100px; height:100px; background:blue; transition-property:width,height; -moz-transition-property:width,height; -webkit-transition-property:width,height; -o-transition-property:width,height; transition-duration:2s,6s; -moz-transition-duration:2s,6s; -webkit-transition-duration:2s,6s; -o-transition-duration:2s,6s; transition-timing-function:ease-in,linear; -moz-transition-timing-function:ease-in,linear; -webkit-transition-timing-function:ease-in,linear; -o-transition-timing-function:ease-in,linear; } #thediv:hover{ width:500px; height:200px; } </style> </head> <body> <div id="thediv"></div> </body> </html>
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