本文實例講述了jQuery自定義動畫函數完整實現技巧。分享給大家供大家參考，具體如下：
運行效果截圖如下：
在線演示地址如下：
http://demo.VeVB.COm/js/2015/jquery-zdy-dh-move-style-demo/
具體代碼如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>自定義動畫DEMO</title><script src="jquery-1.4.4.js"></script><script src="jquery.easing.1.3.js"></script><script>var Tween = { Linear:function (start,alter,curTime,dur) {return start+curTime/dur*alter;},//最簡單的線性變化,即勻速運動 Quad:{//二次方緩動 easeIn:function (start,alter,curTime,dur) { return start+Math.pow(curTime/dur,2)*alter; }, easeOut:function (start,alter,curTime,dur) { var progress =curTime/dur; return start-(Math.pow(progress,2)-2*progress)*alter; }, easeInOut:function (start,alter,curTime,dur) { var progress =curTime/dur*2; return (progress<1?Math.pow(progress,2):-((--progress)*(progress-2) - 1))*alter/2+start; } }, Cubic:{//三次方緩動 easeIn:function (start,alter,curTime,dur) { return start+Math.pow(curTime/dur,3)*alter; }, easeOut:function (start,alter,curTime,dur) { var progress =curTime/dur; return start-(Math.pow(progress,3)-Math.pow(progress,2)+1)*alter; }, easeInOut:function (start,alter,curTime,dur) { var progress =curTime/dur*2; return (progress<1?Math.pow(progress,3):((progress-=2)*Math.pow(progress,2) + 2))*alter/2+start; } }, Quart:{//四次方緩動 easeIn:function (start,alter,curTime,dur) { return start+Math.pow(curTime/dur,4)*alter; }, easeOut:function (start,alter,curTime,dur) { var progress =curTime/dur; return start-(Math.pow(progress,4)-Math.pow(progress,3)-1)*alter; }, easeInOut:function (start,alter,curTime,dur) { var progress =curTime/dur*2; return (progress<1?Math.pow(progress,4):-((progress-=2)*Math.pow(progress,3) - 2))*alter/2+start; } }, Quint:{//五次方緩動 easeIn:function (start,alter,curTime,dur) { return start+Math.pow(curTime/dur,5)*alter; }, easeOut:function (start,alter,curTime,dur) { var progress =curTime/dur; return start-(Math.pow(progress,5)-Math.pow(progress,4)+1)*alter; }, easeInOut:function (start,alter,curTime,dur) { var progress =curTime/dur*2; return (progress<1?Math.pow(progress,5):((progress-=2)*Math.pow(progress,4) +2))*alter/2+start; } }, Sine :{//正弦曲線緩動 easeIn:function (start,alter,curTime,dur) { return start-(Math.cos(curTime/dur*Math.PI/2)-1)*alter; }, easeOut:function (start,alter,curTime,dur) { return start+Math.sin(curTime/dur*Math.PI/2)*alter; }, easeInOut:function (start,alter,curTime,dur) { return start-(Math.cos(curTime/dur*Math.PI/2)-1)*alter/2; } }, Expo: {//指數曲線緩動 easeIn:function (start,alter,curTime,dur) { return curTime?(start+alter*Math.pow(2,10*(curTime/dur-1))):start; }, easeOut:function (start,alter,curTime,dur) { return (curTime==dur)?(start+alter):(start-(Math.pow(2,-10*curTime/dur)+1)*alter); }, easeInOut:function (start,alter,curTime,dur) { if (!curTime) {return start;} if (curTime==dur) {return start+alter;} var progress =curTime/dur*2; if (progress < 1) { return alter/2*Math.pow(2,10* (progress-1))+start; } else { return alter/2* (-Math.pow(2, -10*--progress) + 2) +start; } } }, Circ :{//圓形曲線緩動 easeIn:function (start,alter,curTime,dur) { return start-alter*Math.sqrt(-Math.pow(curTime/dur,2)); }, easeOut:function (start,alter,curTime,dur) { return start+alter*Math.sqrt(1-Math.pow(curTime/dur-1)); }, easeInOut:function (start,alter,curTime,dur) { var progress =curTime/dur*2; return (progress<1?1-Math.sqrt(1-Math.pow(progress,2)):(Math.sqrt(1 - Math.pow(progress-2,2)) + 1))*alter/2+start; } }, Elastic: {//指數衰減的正弦曲線緩動 easeIn:function (start,alter,curTime,dur,extent,cycle) { if (!curTime) {return start;} if ((curTime==dur)==1) {return start+alter;} if (!cycle) {cycle=dur*0.3;} var s; if (!extent || extent< Math.abs(alter)) { extent=alter; s = cycle/4; } else {s=cycle/(Math.PI*2)*Math.asin(alter/extent);} return start-extent*Math.pow(2,10*(curTime/dur-1)) * Math.sin((curTime-dur-s)*(2*Math.PI)/cycle); }, easeOut:function (start,alter,curTime,dur,extent,cycle) { if (!curTime) {return start;} if (curTime==dur) {return start+alter;} if (!cycle) {cycle=dur*0.3;} var s; if (!extent || extent< Math.abs(alter)) { extent=alter; s =cycle/4; } else {s=cycle/(Math.PI*2)*Math.asin(alter/extent);} return start+alter+extent*Math.pow(2,-curTime/dur*10)*Math.sin((curTime-s)*(2*Math.PI)/cycle); }, easeInOut:function (start,alter,curTime,dur,extent,cycle) { if (!curTime) {return start;} if (curTime==dur) {return start+alter;} if (!cycle) {cycle=dur*0.45;} var s; if (!extent || extent< Math.abs(alter)) { extent=alter; s =cycle/4; } else {s=cycle/(Math.PI*2)*Math.asin(alter/extent);} var progress = curTime/dur*2; if (progress<1) { return start-0.5*extent*Math.pow(2,10*(progress-=1))*Math.sin( (progress*dur-s)*(2*Math.PI)/cycle); } else { return start+alter+0.5*extent*Math.pow(2,-10*(progress-=1)) * Math.sin( (progress*dur-s)*(2*Math.PI)/cycle); } } }, Back:{ easeIn: function (start,alter,curTime,dur,s){ if (typeof s == "undefined") {s = 1.70158;} return start+alter*(curTime/=dur)*curTime*((s+1)*curTime - s); }, easeOut: function (start,alter,curTime,dur,s) { if (typeof s == "undefined") {s = 1.70158;} return start+alter*((curTime=curTime/dur-1)*curTime*((s+1)*curTime + s) + 1); }, easeInOut: function (start,alter,curTime,dur,s){ if (typeof s == "undefined") {s = 1.70158;} if ((curTime/=dur/2) < 1) { return start+alter/2*(Math.pow(curTime,2)*(((s*=(1.525))+1)*curTime- s)); } return start+alter/2*((curTime-=2)*curTime*(((s*=(1.525))+1)*curTime+ s)+2); } }, Bounce:{ easeIn: function(start,alter,curTime,dur){ return start+alter-Tween.Bounce.easeOut(0,alter,dur-curTime,dur); }, easeOut: function(start,alter,curTime,dur){ if ((curTime/=dur) < (1/2.75)) { return alter*(7.5625*Math.pow(curTime,2))+start; } else if (curTime < (2/2.75)) { return alter*(7.5625*(curTime-=(1.5/2.75))*curTime + .75)+start; } else if (curTime< (2.5/2.75)) { return alter*(7.5625*(curTime-=(2.25/2.75))*curTime + .9375)+start; } else { return alter*(7.5625*(curTime-=(2.625/2.75))*curTime + .984375)+start; } }, easeInOut: function (start,alter,curTime,dur){ if (curTime< dur/2) { return Tween.Bounce.easeIn(0,alter,curTime*2,dur) *0.5+start; } else { return Tween.Bounce.easeOut(0,alter,curTime*2-dur,dur) *0.5 + alter*0.5 +start; } }, easeOutBounce: function (b, c, t, 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; } } }, //start,alter,curTime,dur easeOutBounce: function (b, c, t, 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; } }};jQuery(function($){ //兩種動畫方式對比，在w3c瀏覽器中是一致的，在IE中有差異（即使用同算法） $("#start").click(function(){ //自定義動畫函數 animate(Fid("song"), {opacity:0.3, left:400}, 2000, Tween.easeOutBounce); //jq動畫效果 $("#jian").animate( {opacity:0.3, left:400}, 2000, 'easeOutBounce') }) /* 參數說明 o:要動畫的對象 end:元素最終的樣式 dur:動畫持續多長時 fx:效果插件 */ function animate(o ,end, dur, fx) { var curTime=0; var start = {};//元素的初始樣式 var alter = {};//元素的增量樣式 var t=setInterval(function () { if (curTime>=dur) clearTimeout(t); for (var i in end) { if(! (i in start))//注意加括號 { //不能用 parseInt.有透明度時會出問題 start[i] = parseFloat(getStyle(o, i)); } if(! (i in alter)) { alter[i] = end[i] - start[i]; } var val = fx(start[i],alter[i],curTime,dur); if(i == 'opacity') { /** o.style.filter, o.style.opacity 火狐下都為空字符串 只能用 o.style.opacity 檢測 注意：ietester下無法測試透明度 */ if(typeof o.style.opacity == "undefined") { o.style.filter = "alpha(opacity="+val*100+")"; }else{ o.style[i] = val; } }else{ o.style[i] = val+'px'; } } curTime+=13; //jquery 中也為 13 },13); } /** 獲取元素樣式 處理透明度、元素浮動樣式的獲取 ，結果帶有單位 */ function getStyle(elem, name) { var nameValue = null; if (document.defaultView) { var style = document.defaultView.getComputedStyle(elem, null); nameValue = name in style ? style[name] : style.getPropertyValue(name); } else { var style = elem.style, curStyle = elem.currentStyle; //透明度 from youa if (name == "opacity") { if (/alpha/(opacity=(.*)/)/i.test(curStyle.filter)) { var opacity = parseFloat(RegExp.$1); return opacity ? opacity / 100 : 0; } return 1; } if (name == "float") { name = "styleFloat"; } var ret = curStyle[name] || curStyle[camelize(name)]; //單位轉換 from jqury if (!/^-?/d+(?:px)?$/i.test(ret) && /^/-?/d/.test(ret)) { var left = style.left, rtStyle = elem.runtimeStyle, rsLeft = rtStyle.left; rtStyle.left = curStyle.left; style.left = ret || 0; ret = style.pixelLeft + "px"; style.left = left; rtStyle.left = rsLeft; } nameValue = ret; } return nameValue === 'auto' ? '0px' : nameValue; } function camelize(s) {//將CSS屬性名轉換成駝峰式 return s.replace(/-[a-z]/gi,function (c) { return c.charAt(1).toUpperCase(); }); } function Fid(id) { return document.getElementById(id); }})</script></head><style>.main{ border:1px solid blue; height:350px;}.pos {position:absolute; left:0px;top:50px; border:5px solid red; background:green;width:100px; height:100px;}</style><body><div class="main"> <div id="song" class="pos" style="display:block;">song</div> <div id="jian" class="pos" style="top:200px;">jian</div></div><button id="start">start</button></body></html>完整實例代碼點擊此處本站下載。
希望本文所述對大家JavaScript程序設計有所幫助。
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