这周做了2个大转盘抽奖，一个使用了jQueryRotate.2.2.js插件，兼容到IE6，另外一个利用css3自己尝试写的
1、插件jQueryRotate.2.2.js（兼容基本浏览器，兼容到IE6）
效果查看：http://play.163.com/special/test-jiu/
此插件必须事先引入jquery插件，PC端推荐
JS插件代码：
// VERSION: 2.2 LAST UPDATE: 13.03.2012
/*
* Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
*
* Made by Wilq32, wilq32@gmail.com, Wroclaw, Poland, 01.2009
* Website: http://code.google.com/p/jqueryrotate/
*/
// Documentation removed from script file (was kinda useless and outdated)
(function($) {
var supportedCSS,styles=document.getElementsByTagName("head")[0].style,toCheck="transformProperty WebkitTransform OTransform msTransform MozTransform".split(" ");
for (var a=0;a<toCheck.length;a++) if (styles[toCheck[a]] !== undefined) supportedCSS = toCheck[a];
// Bad eval to preven google closure to remove it from code o_O
// After compresion replace it back to var IE = 'v' == 'v'
var IE = eval('"v"=="v"');
jQuery.fn.extend({
rotate:function(parameters)
{
if (this.length===0||typeof parameters=="undefined") return;
if (typeof parameters=="number") parameters={angle:parameters};
var returned=[];
for (var i=0,i0=this.length;i<i0;i++)
{
var element=this.get(i);
if (!element.Wilq32 || !element.Wilq32.PhotoEffect) {
var paramClone = $.extend(true, {}, parameters);
var newRotObject = new Wilq32.PhotoEffect(element,paramClone)._rootObj;
returned.push($(newRotObject));
}
else {
element.Wilq32.PhotoEffect._handleRotation(parameters);
}
}
return returned;
},
getRotateAngle: function(){
var ret = [];
for (var i=0,i0=this.length;i<i0;i++)
{
var element=this.get(i);
if (element.Wilq32 && element.Wilq32.PhotoEffect) {
ret[i] = element.Wilq32.PhotoEffect._angle;
}
}
return ret;
},
stopRotate: function(){
for (var i=0,i0=this.length;i<i0;i++)
{
var element=this.get(i);
if (element.Wilq32 && element.Wilq32.PhotoEffect) {
clearTimeout(element.Wilq32.PhotoEffect._timer);
}
}
}
});
// Library agnostic interface
Wilq32=window.Wilq32||{};
Wilq32.PhotoEffect=(function(){
if (supportedCSS) {
return function(img,parameters){
img.Wilq32 = {
PhotoEffect: this
};
this._img = this._rootObj = this._eventObj = img;
this._handleRotation(parameters);
}
} else {
return function(img,parameters) {
// Make sure that class and id are also copied - just in case you would like to refeer to an newly created object
this._img = img;
this._rootObj=document.createElement('span');
this._rootObj.style.display="inline-block";
this._rootObj.Wilq32 =
{
PhotoEffect: this
};
img.parentNode.insertBefore(this._rootObj,img);
if (img.complete) {
this._Loader(parameters);
} else {
var self=this;
// TODO: Remove jQuery dependency
jQuery(this._img).bind("load", function()
{
self._Loader(parameters);
});
}
}
}
})();
Wilq32.PhotoEffect.prototype={
_setupParameters : function (parameters){
this._parameters = this._parameters || {};
if (typeof this._angle !== "number") this._angle = 0 ;
if (typeof parameters.angle==="number") this._angle = parameters.angle;
this._parameters.animateTo = (typeof parameters.animateTo==="number") ? (parameters.animateTo) : (this._angle);
this._parameters.step = parameters.step || this._parameters.step || null;
this._parameters.easing = parameters.easing || this._parameters.easing || function (x, t, b, c, d) { return -c * ((t=t/d-1)*t*t*t - 1) + b; }
this._parameters.duration = parameters.duration || this._parameters.duration || 1000;
this._parameters.callback = parameters.callback || this._parameters.callback || function(){};
if (parameters.bind && parameters.bind != this._parameters.bind) this._BindEvents(parameters.bind);
},
_handleRotation : function(parameters){
this._setupParameters(parameters);
if (this._angle==this._parameters.animateTo) {
this._rotate(this._angle);
}
else {
this._animateStart();
}
},
_BindEvents:function(events){
if (events && this._eventObj)
{
// Unbinding previous Events
if (this._parameters.bind){
var oldEvents = this._parameters.bind;
for (var a in oldEvents) if (oldEvents.hasOwnProperty(a))
// TODO: Remove jQuery dependency
jQuery(this._eventObj).unbind(a,oldEvents[a]);
}
this._parameters.bind = events;
for (var a in events) if (events.hasOwnProperty(a))
// TODO: Remove jQuery dependency
jQuery(this._eventObj).bind(a,events[a]);
}
},
_Loader:(function()
{
if (IE)
return function(parameters)
{
var width=this._img.width;
var height=this._img.height;
this._img.parentNode.removeChild(this._img);
this._vimage = this.createVMLNode('image');
this._vimage.src=this._img.src;
this._vimage.style.height=height+"px";
this._vimage.style.width=width+"px";
this._vimage.style.position="absolute"; // FIXES IE PROBLEM - its only rendered if its on absolute position!
this._vimage.style.top = "0px";
this._vimage.style.left = "0px";
/* Group minifying a small 1px precision problem when rotating object */
this._container = this.createVMLNode('group');
this._container.style.width=width;
this._container.style.height=height;
this._container.style.position="absolute";
this._container.setAttribute('coordsize',width-1+','+(height-1)); // This -1, -1 trying to fix ugly problem with small displacement on IE
this._container.appendChild(this._vimage);
this._rootObj.appendChild(this._container);
this._rootObj.style.position="relative"; // FIXES IE PROBLEM
this._rootObj.style.width=width+"px";
this._rootObj.style.height=height+"px";
this._rootObj.setAttribute('id',this._img.getAttribute('id'));
this._rootObj.className=this._img.className;
this._eventObj = this._rootObj;
this._handleRotation(parameters);
}
else
return function (parameters)
{
this._rootObj.setAttribute('id',this._img.getAttribute('id'));
this._rootObj.className=this._img.className;
this._width=this._img.width;
this._height=this._img.height;
this._widthHalf=this._width/2; // used for optimisation
this._heightHalf=this._height/2;// used for optimisation
var _widthMax=Math.sqrt((this._height)*(this._height) + (this._width) * (this._width));
this._widthAdd = _widthMax - this._width;
this._heightAdd = _widthMax - this._height; // widthMax because maxWidth=maxHeight
this._widthAddHalf=this._widthAdd/2; // used for optimisation
this._heightAddHalf=this._heightAdd/2;// used for optimisation
this._img.parentNode.removeChild(this._img);
this._aspectW = ((parseInt(this._img.style.width,10)) || this._width)/this._img.width;
this._aspectH = ((parseInt(this._img.style.height,10)) || this._height)/this._img.height;
this._canvas=document.createElement('canvas');
this._canvas.setAttribute('width',this._width);
this._canvas.style.position="relative";
this._canvas.style.left = -this._widthAddHalf + "px";
this._canvas.style.top = -this._heightAddHalf + "px";
this._canvas.Wilq32 = this._rootObj.Wilq32;
this._rootObj.appendChild(this._canvas);
this._rootObj.style.width=this._width+"px";
this._rootObj.style.height=this._height+"px";
this._eventObj = this._canvas;
this._cnv=this._canvas.getContext('2d');
this._handleRotation(parameters);
}
})(),
_animateStart:function()
{
if (this._timer) {
clearTimeout(this._timer);
}
this._animateStartTime = +new Date;
this._animateStartAngle = this._angle;
this._animate();
},
_animate:function()
{
var actualTime = +new Date;
var checkEnd = actualTime - this._animateStartTime > this._parameters.duration;
// TODO: Bug for animatedGif for static rotation ? (to test)
if (checkEnd && !this._parameters.animatedGif)
{
clearTimeout(this._timer);
}
else
{
if (this._canvas||this._vimage||this._img) {
var angle = this._parameters.easing(0, actualTime - this._animateStartTime, this._animateStartAngle, this._parameters.animateTo - this._animateStartAngle, this._parameters.duration);
this._rotate((~~(angle*10))/10);
}
if (this._parameters.step) {
this._parameters.step(this._angle);
}
var self = this;
this._timer = setTimeout(function()
{
self._animate.call(self);
}, 10);
}
// To fix Bug that prevents using recursive function in callback I moved this function to back
if (this._parameters.callback && checkEnd){
this._angle = this._parameters.animateTo;
this._rotate(this._angle);
this._parameters.callback.call(this._rootObj);
}
},
_rotate : (function()
{
var rad = Math.PI/180;
if (IE)
return function(angle)
{
this._angle = angle;
this._container.style.rotation=(angle%360)+"deg";
}
else if (supportedCSS)
return function(angle){
this._angle = angle;
this._img.style[supportedCSS]="rotate("+(angle%360)+"deg)";
}
else
return function(angle)
{
this._angle = angle;
angle=(angle%360)* rad;
// clear canvas
this._canvas.width = this._width+this._widthAdd;
this._canvas.height = this._height+this._heightAdd;
// REMEMBER: all drawings are read from backwards.. so first function is translate, then rotate, then translate, translate..
this._cnv.translate(this._widthAddHalf,this._heightAddHalf); // at least center image on screen
this._cnv.translate(this._widthHalf,this._heightHalf); // we move image back to its orginal
this._cnv.rotate(angle); // rotate image
this._cnv.translate(-this._widthHalf,-this._heightHalf); // move image to its center, so we can rotate around its center
this._cnv.scale(this._aspectW,this._aspectH); // SCALE - if needed ;)
this._cnv.drawImage(this._img, 0, 0); // First - we draw image
}
})()
}
if (IE)
{
Wilq32.PhotoEffect.prototype.createVMLNode=(function(){
document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");
try {
!document.namespaces.rvml && document.namespaces.add("rvml", "urn:schemas-microsoft-com:vml");
return function (tagName) {
return document.createElement('<rvml:' + tagName + ' class="rvml">');
};
} catch (e) {
return function (tagName) {
return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');
};
}
})();
}
})(jQuery);
页面调用代码
//awards:奖项，angle:奖项对应的角度，text:提示文字
var rotateFunc = function(awards,angle,text){
$lotterywheel.stopRotate();
$lotterywheel.rotate({
angle:0,
duration: 5000, //转盘转动时间
animateTo: angle+1440, //angle是图片上各奖项对应的角度，1440是我要让指针旋转4圈。所以最后的结束的角度就是这样子^^
callback:function(){ //回掉函数
alert(text)；
flag = true;
}
});
};
在需要转盘旋转的地方调用函数
rotateFunc(awards,angle,text)，比如
if(data==1){
rotateFunc(1,90,'恭喜您抽中的一等奖')
}
if(data==2){
rotateFunc(2,180,'恭喜您抽中的二等奖')
}
if(data==3){
rotateFunc(3,270,'恭喜您抽中的三等奖')
}
判断获奖奖品时按照顺时间的角度计算
2、插件BigRotate.js(兼容高级浏览器，IE9以上)
此插件可基于Jquery，Zepto等插件，推荐在手机上使用
Demo查看：http://play.163.com/special/test-pao/
在需要转动的元素上要写上transition，比如
.lotteryBg{
transition: transform 2s;
-webkit-transition: -webkit-transform 2s;
-moz-transition: -moz-transform 2s;
-o-transition: -o-transform 2s;
}
在需要的地方// 调用抽奖插件，参数(转动的盘,几等奖，改奖品旋转角度，中奖之后执行的函数)
rotateFunc($lotterywheel,3,90,function(){alertFun("获得三等奖")});
/* 抽奖 */
var islogin = true;
// 转盘转动完之后的事件
function alertFun(text){
alert(text);
flag = true;
}
/* 抽奖按钮事件绑定 */
var data = [1,2,3,0]; //返回的数组
$lotteryArrow.on('click',function(){
if(flag){
console.log("开始抽奖");
// 本地模拟随机生成奖品
var n = data[Math.floor(Math.random()*data.length)];
flag = false;
// 调用抽奖插件，参数(转动的盘,几等奖，改奖品旋转角度，中奖之后执行的函数)
if(n == 1){
rotateFunc($lotterywheel,1,45,function(){alertFun("恭喜或得到一等奖")});
} else if(n== 2){
rotateFunc($lotterywheel,1,90,function(){alertFun("恭喜或得到二等奖")});
} else if(n == 3){
rotateFunc($lotterywheel,3,135,function(){alertFun("恭喜或得到三等奖")});
}
}
})
默认转2圈后再到达中奖的位置，判断获奖奖品时按照逆时间的角度计算
附上JS插件代码：
/* ==========================================================
* BigRotate.js v20140630
* ==========================================================
* Copyright hxw
*
* 大转盘抽奖js
* ========================================================== */
// 调用方法：(转动的盘,几等奖，改奖品旋转角度，中奖之后执行的函数)
// rotateFunc(wheel,awards,angle,Fun)
// 如：rotateFunc($lotterywheel,3,90,function(){alertFun("获得三等奖")});
// (function(){
var RotateTimeOut;//定时器
var a = 0;//转的角度
var c = 1;//旋转圈数
//wheel:转动的区域(比如底盘), awards:奖项，angle:奖项对应的角度，text:提示文字
var rotate = function(wheel,awards,angle,callback){
if(navigator.userAgent.indexOf("MSIE 6.0") > 0 || navigator.userAgent.indexOf("MSIE 7.0")>0 || navigator.userAgent.indexOf("MSIE 8.0")>0){
alert("请升级IE浏览器或使用其他浏览器参与抽奖")
} else if(navigator.userAgent.indexOf("MSIE 9.0")>0){
RotateTimeOut = setTimeout(function(){
a += 1;
if(a < angle){
wheel.css('-ms-transform','rotate('+ a +'deg)');
rotate(wheel,awards,angle,callback);
} else {
clearTimeout(RotateTimeOut);
callback();
}
},1);
} else {
// wheel.style.transform = 'rotate('+ angle +'deg)';
// wheel.style.oTransform = 'rotate('+ angle +'deg)';
// wheel[0].style.mozTransform = 'rotate('+ angle +'deg)';
// wheel[0].style.webkitTransform = 'rotate('+ angle +'deg)';
wheel.css('transform','rotate('+ angle +'deg)');
wheel.css('-webkit-transform','rotate('+ angle +'deg)');
wheel.css('-o-transform','rotate('+ angle +'deg)');
wheel.css('-moz-transform','rotate('+ angle +'deg)');
setTimeout(function(){callback()},2000);
}
};
//参数(转动的盘,几等奖，改奖品旋转角度，中奖之后执行的函数)
var rotateFunc = function(wheel,awards,angle,Fun){
//2表示转2圈之后再到达获奖的位置
var a = 2*360*c + angle;
c++;
rotate(wheel,awards,a,Fun);
}
// })();