var _rotate = new iRotate("#div",{ start : 0, //开始角度,可不写,默认0 end :45, //结束角度 time :5000, //持续时间,可不写,默认1000 easing : "easeOut", //动画形式,目前只有"linear"和"easeOut"两种,可不写,默认"easeOut" callback : function(){ //回调函数//this为当前对象 }});_rotate.stop(function(){ //停止回调函数 //this为当前对象});实现的效果图如下:
完整的示例代码如下:
<!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=utf-8" /><title>简单转盘效果</title><style>#RotateDiv{border-radius:50px 0 50px 50px }#RotateDiv,#RotateDiv2{ width: 50px;height: 50px; color: #fff;text-align: center; line-height: 50px; background: #444; position: relative; margin: 20px;border-radius:50px 0 50px 50px}</style></head><body><p>举例子:</p><p> <button id="RotateBtn">开始抽奖</button> </p><div id="RotateDiv"></div><p>默认转动:</p><p> <button id="RotateBtn2">开始抽奖2</button> </p><div id="RotateDiv2"></div><script type="text/javascript">window.iRotate = (function(w,d){ function R(obj,json){ this.obj = (typeof obj=="object") ? obj : d.querySelector(obj); this.startTime = Date.now(); this.timer = null; this.rotate(json); }; R.prototype = { rotate : function(json){ var t = this,times = json["time"] || 1000; clearInterval(t.timer) t.timer = setInterval(function(){ var changeTime = Date.now(), tm = times - Math.max(0,t.startTime - changeTime + times), value = Tween[json["easing"] || "easeOut"](tm,+json["start"] || 0,json["end"] - (+json["start"] || 0),times); t.obj.style["transform"] = t.obj.style["-webkit-transform"] = "rotate("+value%360+"deg)"; t.obj.setAttribute("data-rotate",value%360) if(tm==times){clearInterval(t.timer);json.callback && json.callback.call(t.obj) } },10) }, stop : function(fn){ clearInterval(this.timer); fn && fn.call(this.obj) } }; return R;})(window,document);var Tween = {linear: function (t, b, c, d){return c*t/d + b;},easeOut: function(t, b, c, d){return -c *(t/=d)*(t-2) + b;}}//默认转动;(function(){ var off = true,off2 = true; RotateBtn.onclick = function(){ if(!off) return //判断是否在旋转 off = false new iRotate("#RotateDiv",{ end :45+1800, time :5000, callback : function(){ //回调函数this.innerHTML = this.getAttribute("data-rotate")off = true} }); } var r = null; function rotate2(){ //递归持续旋转 r = new iRotate("#RotateDiv2",{ start : 0, end :360, time :1000, easing : "linear", callback : function(){ rotate2() } }); } rotate2() RotateBtn2.onclick = function(){ if(!off2) return //判断是否在旋转 off2 = false r.stop(); //停止之前的旋转 new iRotate("#RotateDiv2",{ start : RotateDiv2.getAttribute("data-rotate"), end :65+1800, time :5000, callback : function(){ //回调函数this.innerHTML = this.getAttribute("data-rotate")off2 = true} }); }})(); </script></body></html>总结