jQuery Easing 使用方法及其图解

你的名字 2022-09-22 03:46 209阅读 0赞

从[jQuery API文档][jQuery API]中可以知道，jQuery自定义动画的函数.animate( properties \[, duration\] \[,easing\] \[, complete\] )有四个参数：

*  properties：一组包含作为动画属性和终值的样式属性和及其值的集合  
    
 *  duration(可选)：动画执行时间，其值可以是三种预定速度之一的字符串("slow","normal", or "fast")或表示动画时长的毫秒数值(如：1000)
 *  easing(可选)：要使用的过渡效果的名称，如："linear"或"swing"
 *  complete(可选)：在动画完成时执行的函数

其中参数easing默认有两个效果："linear"和"swing"，如果需要更多效果就要插件支持了，[jQuery EasingPlugin][]提供了像"easeOutExpo"、"easeOutBounce"等30多种效果，大家可以[点击这里][Link 1]去看每一种easing的演示效果，下面详细介绍下其使用方法及每种easing的曲线图。

### jQuery easing 使用方法 ###

首先，项目中如果需要使用特殊的动画效果，则需要在引入jQuery之后引入jquery.easing.1.3.js

1. <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.js"></script>  
2. <script type="text/javascript" src="http://gsgd.co.uk/sandbox/jquery/easing/jquery.easing.1.3.js"></script>

引入之后，easing参数可选的值就有以下32种：

1.  linear  
    
2.  swing  
    
3.  easeInQuad  
    
4.  easeOutQuad  
    
5.  easeInOutQuad  
    
6.  easeInCubic  
    
7.  easeOutCubic  
    
8.  easeInOutCubic  
    
9.  easeInQuart  
    
10. easeOutQuart  
    
11. easeInOutQuart  
    
12. easeInQuint  
    
13. easeOutQuint  
    
14. easeInOutQuint  
    
15. easeInExpo  
    
16. easeOutExpo  
    
17. easeInOutExpo  
    
18. easeInSine  
    
19. easeOutSine  
    
20. easeInOutSine  
    
21. easeInCirc  
    
22. easeOutCirc  
    
23. easeInOutCirc  
    
24. easeInElastic  
    
25. easeOutElastic  
    
26. easeInOutElastic  
    
27. easeInBack  
    
28. easeOutBack  
    
29. easeInOutBack  
    
30. easeInBounce  
    
31. easeOutBounce  
    
32. easeInOutBounce

当然一般一个项目中不可能会用到这么多效果，为了减少代码冗余，必要时可以不用引入整个jquery.easing.1.3.js，我们可以只把我们需要的几种easing放入Javascript文件中，如项目中只用到"easeOutExpo"和"easeOutBounce"两种效果，只需要下面的代码就可以了

1. jQuery.extend( jQuery.easing,  
2. \{  
3.     easeOutExpo: **function** (x, t, b, c, d) \{  
4.         **return** (t==d) ? b+c : c \* (-Math.pow(2, \-10 \* t/d) \+ 1) \+ b;  
5.     \},  
6.     easeOutBounce: **function** (x, t, b, c, d) \{  
7.         **if** ((t/=d) < (1/2.75)) \{  
8.             **return** c\*(7.5625\*t\*t) \+ b;  
9.         \} **else** **if** (t < (2/2.75)) \{  
10.             **return** c\*(7.5625\*(t-=(1.5/2.75))\*t \+ .75) \+ b;  
11.         \} **else** **if** (t < (2.5/2.75)) \{  
12.             **return** c\*(7.5625\*(t-=(2.25/2.75))\*t \+ .9375) \+ b;  
13.         \} **else** \{  
14.             **return** c\*(7.5625\*(t-=(2.625/2.75))\*t \+ .984375) \+ b;  
15.         \}  
16.     \},  
17. \});

使用jQuery自定义动画函数animate来指定easing效果，如自定义一种类弹簧效果的动画：

1.  $(myElement).animate(\{  
2.      top: 500,  
3.      opacity: 1  
4.  \}, 1000, 'easeOutBounce');

值得一提的是jQuery1.4版本中对animate()方法，easing的方法进行了扩展，支持为每个属性指定easing方法，详细请参考[这里][Link 2]，如：

1.  $(myElement).animate(\{  
2.      left: \[500, 'swing'\],  
3.      top: \[200, 'easeOutBounce'\]  
4.  \});

也可以用另外一种写法：

1.  $(myElement).animate(\{  
2.      left: 500,  
3.      top: 200  
4.  \}, \{  
5.      specialEasing: \{  
6.          left: 'swing',  
7.          top: 'easeOutBounce'  
8.      \}  
9.  \});

使用jQuery内置动画函数如slideUp()、slideDown()等来指定easing效果，以下两种方法都可以：

1.  $(myElement).slideUp(1000, method, callback\});  
2.  $(myElement).slideUp(\{  
3.      duration: 1000,   
4.      easing: method,   
5.      complete: callback  
6.  \});

### jQuery easing 图解 ###

以下图解可以让你更容易理解每一种easing的效果

<table style="margin:0px; padding:0px; border:1px solid silver; border-collapse:collapse; width:800px"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758494_4275.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758510_3299.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758520_8021.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758531_9179.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758544_2995.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758564_6106.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 1. linear</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 2. swing</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 3. easeInQuad</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 4. easeOutQuad</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 5.easeInOutQuad</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 6. easeInCubic</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758827_6563.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758860_4249.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758871_5957.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758886_7544.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758898_8983.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758909_5899.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 7.easeOutCubic</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 8.easeInOutCubic</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 9. easeInQuart</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 10.easeOutQuart</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 11.easeInOutQuart</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 12.easeInQuint</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758952_2613.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758964_3969.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758974_1084.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355758989_7332.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759005_4820.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759018_8629.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 13.easeOutQuint</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 14.easeInOutQuint</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 15. easeInExpo</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 16.easeOutExpo</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 17.easeInOutExpo</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 18. easeInSine</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759068_1548.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759079_4131.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759103_1901.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759115_8430.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759127_1975.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759139_3448.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 19.easeOutSine</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 20.easeInOutSine</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 21. easeInCirc</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 22.easeOutCirc</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 23.easeInOutCirc</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 24.easeInElastic</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759201_5239.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759217_4942.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759235_3825.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759248_4364.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759258_8479.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759272_5334.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 25.easeOutElastic</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 26.easeInOutElastic</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 27. easeInBack</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 28.easeOutBack</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 29.easeInOutBack</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 30.easeInBounce</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759313_7247.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> <img src="https://img-my.csdn.net/uploads/201212/17/1355759323_3111.jpg" alt="" title="jQuery&nbsp;Easing&nbsp;使用方法及其图解" style="margin:0px; padding:0px"></td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> &nbsp;</td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 31.easeOutBounce</td> 
 <td style="margin:0px; padding:3px; border:1px solid silver; border-collapse:collapse"> 32.easeInOutBounce</td> 
 </tr> 
 </tbody> 
</table>

[jQuery API]: http://api.jquery.com/animate/
[jQuery EasingPlugin]: http://gsgd.co.uk/sandbox/jquery/easing/
[Link 1]: http://matthewlein.com/experiments/easing.html
[Link 2]: http://james.padolsey.com/javascript/easing-in-jquery-1-4a2/