jQuery Easing 使用方法及其图解

本文深入解析了jQuery中的动画功能,特别是自定义动画函数.animate的使用方法。涵盖了参数详解、内置动画函数、easing效果扩展等内容,并附带了丰富的示例代码。

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jQuery API 文档中可以知道,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 Easing Plugin提供了像"easeOutExpo"、"easeOutBounce"等30多种效果,大家可以 点击这里去看每一种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。
 
 

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                         

jQuery 1.4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,如:

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

 

也可以用另外一种写法:

$(myElement).animate({  
    left: 500,  
    top: 200  
}, {  
    specialEasing: {  
        left: 'swing',  
        top: 'easeOutBounce'  
    }  
});  

 

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:

$(myElement).slideUp(1000, method, callback});  
$(myElement).slideUp({  
    duration: 1000,   
    easing: method,   
    complete: callback  
}); 

 

jQuery easing 图解

以下图解可以让你更容易理解每一种easing的效果
1. linear2. swing3. easeInQuad4. easeOutQuad5. easeInOutQuad6. easeInCubic
7. easeOutCubic8. easeInOutCubic9. easeInQuart10. easeOutQuart11. easeInOutQuart12. easeInQuint
13. easeOutQuint14. easeInOutQuint15. easeInExpo16. easeOutExpo17. easeInOutExpo18. easeInSine
19. easeOutSine20. easeInOutSine21. easeInCirc22. easeOutCirc23. easeInOutCirc24. easeInElastic
25. easeOutElastic26. easeInOutElastic27. easeInBack28. easeOutBack29. easeInOutBack30. easeInBounce
    
31. easeOutBounce32. easeInOutBounce     
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>弹跳</title>
    <link rel="stylesheet" href="css/demo.css">
    <script src="js/jquery-3.1.1.js"></script>
    <script type="text/javascript" src="js/jquery.easing.1.3.js"></script>
    <script src="js/demo.js"></script>
</head>
<body>
<div style="width: 80%;margin: 40px auto;padding: 10px;">
    <div class="item">
        <div id="item-container" class="item-container"></div>
        <div id="item-shadow" class="item-shadow"></div>
    </div>
    <div class="item">
        <div class="item-container"></div>
        <div class="item-shadow"></div>
    </div>
</div>
</body>
</html>
demo
*{
    margin: 0;
    padding: 0;
}
.item{
    position: relative;
    display: inline-block;
    width: 300px;
    height: 200px;
    margin: 20px;
}
.item-container{
    position: absolute;
    z-index: 99;
    width: 300px;
    height: 200px;
    border-radius: 20px;
    background-color: #434343;
    border: 3px solid #242424;
    cursor: pointer;
    /*
    使用多层阴影实现<span class="wp_keywordlink_affiliate"><a href="http://www.yyyweb.com/tag/%e6%8c%89%e9%92%ae" title="查看按钮中的全部文章" target="_blank">按钮</a></span>立体效果
    第一层:Y轴偏移1像素、不透明度为0.25的白色外阴影效果
    第二层:Y轴偏移1像素、不透明度为0.25的白色内阴影效果
    第三层:偏移位0、不透明度为0.25的黑色外阴影效果
    第四层:Y轴偏移20像素、不透明度为0.03的白色内阴影效果
    第五层:X轴偏移-20像素、Y轴偏移20像素、不透明度为0.15的黑色内阴影效果
    第六层:X轴偏移20像素、Y轴偏移20像素、不透明度为0.05的白色内阴影效果
    */
    box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(0,0,0,0.25) 0px 0px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
}
.item-shadow{
    position: absolute;
    top: 205px;
    z-index: 1;
    width: 290px;
    height: 10px;
    margin-left: 5px;
    border-radius: 30% 30% 50% 50%/50%;
    background-color: #000;
    opacity: 0.85;
    box-shadow: 0 0 10px 8px #000;
}
demo.css
jQuery.easing['jswing'] = jQuery.easing['swing'];

jQuery.extend( jQuery.easing,
    {
        def: 'easeOutQuad',
        swing: function (x, t, b, c, d) {
            //alert(jQuery.easing.default);
            return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
        },
        easeInQuad: function (x, t, b, c, d) {
            return c*(t/=d)*t + b;
        },
        easeOutQuad: function (x, t, b, c, d) {
            return -c *(t/=d)*(t-2) + b;
        },
        easeInOutQuad: function (x, t, b, c, d) {
            if ((t/=d/2) < 1) return c/2*t*t + b;
            return -c/2 * ((--t)*(t-2) - 1) + b;
        },
        easeInCubic: function (x, t, b, c, d) {
            return c*(t/=d)*t*t + b;
        },
        easeOutCubic: function (x, t, b, c, d) {
            return c*((t=t/d-1)*t*t + 1) + b;
        },
        easeInOutCubic: function (x, t, b, c, d) {
            if ((t/=d/2) < 1) return c/2*t*t*t + b;
            return c/2*((t-=2)*t*t + 2) + b;
        },
        easeInQuart: function (x, t, b, c, d) {
            return c*(t/=d)*t*t*t + b;
        },
        easeOutQuart: function (x, t, b, c, d) {
            return -c * ((t=t/d-1)*t*t*t - 1) + b;
        },
        easeInOutQuart: function (x, t, b, c, d) {
            if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
            return -c/2 * ((t-=2)*t*t*t - 2) + b;
        },
        easeInQuint: function (x, t, b, c, d) {
            return c*(t/=d)*t*t*t*t + b;
        },
        easeOutQuint: function (x, t, b, c, d) {
            return c*((t=t/d-1)*t*t*t*t + 1) + b;
        },
        easeInOutQuint: function (x, t, b, c, d) {
            if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
            return c/2*((t-=2)*t*t*t*t + 2) + b;
        },
        easeInSine: function (x, t, b, c, d) {
            return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
        },
        easeOutSine: function (x, t, b, c, d) {
            return c * Math.sin(t/d * (Math.PI/2)) + b;
        },
        easeInOutSine: function (x, t, b, c, d) {
            return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
        },
        easeInExpo: function (x, t, b, c, d) {
            return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
        },
        easeOutExpo: function (x, t, b, c, d) {
            return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
        },
        easeInOutExpo: function (x, t, b, c, d) {
            if (t==0) return b;
            if (t==d) return b+c;
            if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
            return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
        },
        easeInCirc: function (x, t, b, c, d) {
            return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
        },
        easeOutCirc: function (x, t, b, c, d) {
            return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
        },
        easeInOutCirc: function (x, t, b, c, d) {
            if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
            return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
        },
        easeInElastic: function (x, t, b, c, d) {
            var s=1.70158;var p=0;var a=c;
            if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
            if (a < Math.abs(c)) { a=c; var s=p/4; }
            else var s = p/(2*Math.PI) * Math.asin (c/a);
            return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
        },
        easeOutElastic: function (x, t, b, c, d) {
            var s=1.70158;var p=0;var a=c;
            if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
            if (a < Math.abs(c)) { a=c; var s=p/4; }
            else var s = p/(2*Math.PI) * Math.asin (c/a);
            return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
        },
        easeInOutElastic: function (x, t, b, c, d) {
            var s=1.70158;var p=0;var a=c;
            if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
            if (a < Math.abs(c)) { a=c; var s=p/4; }
            else var s = p/(2*Math.PI) * Math.asin (c/a);
            if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
            return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
        },
        easeInBack: function (x, t, b, c, d, s) {
            if (s == undefined) s = 1.70158;
            return c*(t/=d)*t*((s+1)*t - s) + b;
        },
        easeOutBack: function (x, t, b, c, d, s) {
            if (s == undefined) s = 1.70158;
            return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
        },
        easeInOutBack: function (x, t, b, c, d, s) {
            if (s == undefined) s = 1.70158;
            if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
            return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
        },
        easeInBounce: function (x, t, b, c, d) {
            return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b;
        },
        easeOutBounce: function (x, t, b, c, d) {
            if ((t/=d) < (1/2.75)) {
                return c*(7.5625*t*t) + b;
            } else if (t < (2/2.75)) {
                return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
            } else if (t < (2.5/2.75)) {
                return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
            } else {
                return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
            }
        },
        easeInOutBounce: function (x, t, b, c, d) {
            if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
            return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
        }
    });
jquery.easing.1.3.js
/**
 * Created by Administrator on 2017/3/16.
 */
$(function(){
    $(".item-container").hover(function(){
        upHover(this);
    },function(){
        downHover(this);
    });
});
function upHover(obj){
    $(obj).animate({
        top:'-20px'
    },{
        easing:'easeInOutQuint'
    });
    $(obj).next().animate({
        width:'310px',
        'margin-left':'-5px',
        opacity:'0.7',
        'box-shadow':'0 0 16px 16px #000'
    },{
        easing:'easeInOutQuint'
    });
}
function downHover(obj){
    $(obj).animate({
        top:'0'
    },{
        duration: 1000,
        easing:'easeOutBounce'
    });
    $(obj).next().animate({
        width:'290px',
        'margin-left':'5px',
        opacity:'0.9',
        'box-shadow':'0 0 10px 8px #000'
    },{
        duration: 1000,
        easing:'easeOutBounce'
    });
}
demo.js

转载于:https://www.cnblogs.com/interstellar/p/6562446.html

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