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做了个简单的插件,以后慢慢重构:
/** * * 描述:javascript缓动 * jQuery Tween算法:算法来源:http://www.robertpenner.com/easing/ * @author:xuzengqiang * @since :2015-1-23 11:17:51 * 两种比较复杂的没有收录进来 * Elastic:指数衰减的正弦曲线缓动; * Back:超过范围的三次方缓动((s+1)*t^3 - s*t^2); **/ ;(function($){ jQuery.extend({ Tweens:{ Linear:function(t,b,c,d){ //无缓动 return c*t/d+b; }, Quad: { //二次方缓动(t^2) easeIn: function(t,b,c,d){ return c*(t/=d)*t + b; }, easeOut: function(t,b,c,d){ return -c *(t/=d)*(t-2) + b; }, easeInOut: function(t,b,c,d){ if ((t/=d/2) < 1) return c/2*t*t + b; return -c/2 * ((--t)*(t-2) - 1) + b; } }, Cubic: { //三次方缓动(t^3) easeIn: function(t,b,c,d){ return c*(t/=d)*t*t + b; }, easeOut: function(t,b,c,d){ return c*((t=t/d-1)*t*t + 1) + b; }, easeInOut: function(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; } }, Quart: { //四次方缓动(t^4) easeIn: function(t,b,c,d){ return c*(t/=d)*t*t*t + b; }, easeOut: function(t,b,c,d){ return -c * ((t=t/d-1)*t*t*t - 1) + b; }, easeInOut: function(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; } }, Quint: { //五次方缓动(t^5) easeIn: function(t,b,c,d){ return c*(t/=d)*t*t*t*t + b; }, easeOut: function(t,b,c,d){ return c*((t=t/d-1)*t*t*t*t + 1) + b; }, easeInOut: function(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; } }, Sine: { //正弦曲线的缓动(sin(t)) easeIn: function(t,b,c,d){ return -c * Math.cos(t/d * (Math.PI/2)) + c + b; }, easeOut: function(t,b,c,d){ return c * Math.sin(t/d * (Math.PI/2)) + b; }, easeInOut: function(t,b,c,d){ return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b; } }, Expo: { //指数曲线的缓动(2^t) easeIn: function(t,b,c,d){ return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b; }, easeOut: function(t,b,c,d){ return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b; }, easeInOut: function(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; } }, Circ: { //圆形曲线的缓动(sqrt(1-t^2)) easeIn: function(t,b,c,d){ return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b; }, easeOut: function(t,b,c,d){ return c * Math.sqrt(1 - (t=t/d-1)*t) + b; }, easeInOut: function(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; } }, Bounce: { //指数衰减的反弹缓动 easeIn: function(t,b,c,d){ return c - jQuery.Tweens.Bounce.easeOut(d-t, 0, c, d) + b; }, easeOut: function(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; } }, easeInOut: function(t,b,c,d){ if (t < d/2) return jQuery.Tweens.Bounce.easeIn(t*2, 0, c, d) * .5 + b; else return jQuery.Tweens.Bounce.easeOut(t*2-d, 0, c, d) * .5 + c*.5 + b; } } }, /** * 描述:获取样式表中的样式名称以及对应的样式值,以数组的形式返回 **/ Properties:function(properties){ var //属性对象集合 props = [], //属性名称集合 names = [], len = 0; for(var prop in properties) { names[len]=prop; props[names[len]]=properties[prop]; len++; } return { names: names, props: props } }, }); /** * 描述:jQuery缓动 * options:参数 * properties:最终的样式.类似{"width":"200px","opacity":"1"}, * callback:回调函数 **/ jQuery.fn.slowMove = function(options,properties,callback){ var defaultOptions={ duration:1000, //持续时间 speed:2, //速度,默认为1,speed越大,速度越快 tween:'Linear', //请选择Tween算法 //缓动方式:Linear无缓动方式 //easeIn(从0开始加速) //easeOut:(减速到0的缓动) //easeInOut(前半段从0开始加速,后半段减速到0的缓动). ease:'easeIn' }; var slow = jQuery.extend({},defaultOptions,options || {}), current = $(this); /** * 缓动核心函数 * prop:对象 **/ function move(prop,t,b,c,d){ var result; if(slow.tween === "Linear") { result = jQuery.Tweens[slow.tween](t,b,c,d); } else { result = jQuery.Tweens[slow.tween][slow.ease](t,b,c,d); } if(t<=d) { t += slow.speed; current.css(prop,result).addClass("slowMove"); setTimeout(function(){move(prop,t,b,c,d);},10); } else { current.removeClass("slowMove"); if(typeof callback === "undefined") return false; callback(); } }; /** * 描述:获取改变值 **/ function getChange(end,begin){ if(typeof end === "string") { var oper = end[0]; if(isNaN(oper)){ end = end.substr(end.indexOf("=")+1); if(oper === "+") { //每次自增 return parseInt(end); } else { //自减 return -parseInt(end); } } else { return parseInt(end) - begin; } } return parseInt(end) - begin; } return this.each(function(){ var styles = jQuery.Properties(properties), names = styles.names, props = styles.props; for(var i=0,maxLen=names.length;i<maxLen;i++) { var //进行操作的对象 prop = names[i], //改变值 change, //起始值 begin = parseInt(current.css(prop)), //起始时间 timer = 0; if(!isNaN(begin)) { change = getChange(props[prop],begin); move(prop,timer,begin,change,slow.duration); } } }); }; jQuery.fn.extend({ /** * 描述:是否在移动 **/ isMove:function(){ return $(this).hasClass("slowMove"); } }); })(jQuery);测试代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> <style type="text/css"> *{margin:0;padding:0;font-family:微软雅黑;font-size:11pt} .range{border:5px solid #FFFFFF;width:200px;height:100px;margin-top:200px;margin-left:200px;overflow:hidden; box-shadow:0px 0px 10px #AFAFAF;} .target{width:200px;height:100px;list-style:none;position:relative} .target li{width:200px;height:100px;} .pop{border:2px solid #AFAFAF;width:20px;height:20px;border-radius:20px;position:relative;opacity:0 } </style> <script type="text/javascript" src="jquery-1.9.1.js?version=20150123"></script> <script type="text/javascript" src="jQuery.tween.js?version=20150123"></script> </head> <body> <div class="range"> <ul class="target"> <li style="background:#FF0000">1</li> <li style="background:#FF7700">2</li> <li style="background:#FFFF00">3</li> <li style="background:#FFFFAA">4</li> <li style="background:#EFEFEF">5</li> </ul> </div> <button class="move">移动</button> <button class="test">测试</button> <div class="pop"></div> </body> <script type="text/javascript"> var index=0; $(".move").click(function(){ if(!$(".target").isMove()) { $(".target").slowMove({"tween":"Circ","ease":"easeOut","speed":20},{"top":"-=100px"}); index++; } }); $(".test").click(function(){ $(".pop").slowMove({"tween":"Circ","ease":"easeOut","speed":20},{"left":"+=100px","margin-top":"+=10px", "opacity":1 }); }); </script> </html>
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原文地址:http://blog.csdn.net/xuzengqiang2/article/details/43058597