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jQuery-H5-css3转盘抽奖-遁地龙卷风

(-1)写在前面

这个idea不是我的,首先向这位前辈致敬。

我用的是chrome49, jquery3.0。

完整的程序案例在我的百度云盘http://pan.baidu.com/s/1jI2QSnW

最近大四实习,该走的都走了,过两天也要去北京找一个web前段的实习机会,世界这么大,我不得不去看看…。

(0)知识储备

a. webkitTransitionEnd

webkit是浏览器前缀,webkitTransitionEnd在过渡完成后触发。类似DOM对象.click的方式注册事件,对于webkitTransitionEnd事件是无效的。

b. transform:scale(0.8)

已元素中心为准缩放元素,被元素包裹的内容也跟着缩放,元素实际大小没有发生化,(已计算后的属性值为准),注意jquery3.0的width()、height()方法会取得缩放后的尺寸!。对元素margin、top、left不跟着元素的缩放而缩放。该属性不会继承。

c. #arrow:active

活动是一种持续的行为,已一个div元素为例,当你一直按着鼠标左键或有键不放,就会匹配改选择器。

d. transform:rotate(45deg)

默认以元素中心为轴心转动元素,如图所示:

技术分享

transform:rotate(45deg)执行完毕后,在0度位置的信息在45度位置,转动是整体的,注意0度和45度这个组合,可以围绕圆心瞬时针转动到任意位置,在这个案例中,我们关心的是元素转动的度数和指针指向区域的关系。

(1)效果图

 技术分享

(2)具体代码

a. html文件

<!DOCTYPE html>

<html lang="en">

<head>

<meta charset=utf-8>

<script   type="text/javascript" src="http://www.mamicode.com/debug-jquery-3.0.0.js"></script>

<script  type="text/javascript" src="http://www.mamicode.com/base.js"></script>

<link rel="shortcut icon" href="http://www.mamicode.com/favicon.ico" type="image/x-icon">

 

<title>为了生活</title>

<style type="text/css">

*

{

     margin:0;

     padding:0;

}

body

{

     position:absolute;

}

#active

{

     width:640px;

     height:640px;

     position:absolute;

     transform:scale(0.8);

}

#dial

{

 

     width:640px;

     height:640px;

     position:absolute;

}

#arrow

{

     width:240px;

     height:252px;

     overflow:hidden;

     position:absolute;

}

#arrow:active

{

     /*鼠标右键按在#arrow上时,元素缩小*/

     transform:scale(0.95);

}

</style>    

</head

<body>

     <div id="active">

           <div id="dial"><img src="http://www.mamicode.com/images/lanren.png" width="640" height="640"/></div>

           <div id="arrow"><img src="http://www.mamicode.com/images/arrow.png" width="750" height="252"/></div>

     </div>

</body>             

</html>                 

base.js

$(function()

{

     var $arrow = $("#arrow"),

           $active = $("#active"),

           $dial = $("#dial"),

           rounds = 5*360;      //基础圈数

     $arrow.centerPos();//使元素水平垂直居中、centerPos是自定义函数

     $active.centerPos();

     window.onresize = function()

     {

           $arrow.centerPos();

           $active.centerPos();

     }

     $arrow.click(function()

     {

           if($arrow.data("ding")) return;//如果#arrow正在转动,不向下执行

           $arrow.data("ding", true);//true表示转动,false表示已停止

           var deg = $.random(0,360);//产生一个>=0&&<=360的数

           $arrow.data("deg",deg);

           $dial.css({

                 transform:"rotate("+(rounds+deg)+"deg)",

                 transition:"3s",

           });

          

     })

     $dial.on("webkitTransitionEnd",function()

     {

           //旋转结束执行

           $arrow.data("ding",false);

           $dial.css({

                 transition:"none",//不指定none的话等同于transition:"3s"

                 transform:"rotate("+$arrow.data("deg")+"deg)",

                 /*

                      这么做会从deg(上次)转到5*360+deg(本次)

                      如果不这么左第一次转动之后,再次转动会5*360+deg(上次)转到5*360+deg(本次)

                     

                 */

           });

           var award = getAward();

           alert(award);

     })

     function getAward()

     {

          

           var deg = $arrow.data("deg")

           /*

                 有指针的哪个图片初始方向相对于圆盘往右偏了2度...

           */

           if ((deg >= 332 && deg <= 360) || (deg > 0 && deg < 32))

           {

                 return "三网通流量 10M";

           }

           else if ((deg >= 32 && deg < 92))

           {

                 return "话费20元";

           }

           else if (deg >= 92 && deg < 152)

           {              

                 return "ipad mini4";

           }

           else if (deg >= 152 && deg < 212)

           {

                 return "话费5元";

           }

           else if (deg >= 210 && deg < 272)

           {

                 return "三网通流量 30M";

           }

           else if (deg >= 272 && deg < 332)

           {

                 return "iPhone7";

           }

     }

});

$.random = function(min,max,filter)

{

    

     var i,

           n = Math.floor(Math.random()*(max-min+1)+min);

     if(filter != undefined && filter.constructor == Array)

     {

           for(i=filter.length-1;i>-1;i--)

           {

                 if(n == filter[i])

                 {

                      n = Math.floor(Math.random()*(max-min+1)+min)

                      i = filter.length;

                 }

           }

     }

     return n;

}

//top、left根据父元素的宽和高计算

$.fn.centerPos = function()

{

     var parent;

     this.each(function(index)

     {

           parent = this.parentNode;

           if(parent == document.body)

           {

                 parent = window;

           }

           var position = $(this).css("position");

           if(position == "fixed" || position=="absolute")

           {

                 $(this).css("left",parent != window ?(parent.offsetWidth-this.offsetWidth)/2:(parent.innerWidth-this.offsetWidth)/2);

                 $(this).css("top",parent != window ?(parent.offsetHeight-this.offsetHeight)/2:(parent.innerHeight-this.offsetHeight)/2);

           }

           else

           {

                 window.console.error("没有设置有效的position值");

           }

     })

     return this;

}   

function next(current)

{

     var parent = current.parentNode,

           children = parent.children,

           //childNodes、nextSibling maybe contain ObjectText

           length = children.length;

     for(var i=0;i<length;i++)

     {

           if(current == children[i])

                 break;

     }

     //if not lastChild

     if(i<length-1)

     {

           return children[i+1];

     }

     else

     {

           //recursion search until parent == document.body

           if(parent != document.body)

           {

                 return next(parent);

           }

           else

           {

                 window.console.warn("Can not get next sibling");

           }

     }

    

}

function getRandomInteger(min,max)

{

     return Math.floor(Math.random()*(max-min+1))+min

}

function imitateMouseEvent(element,type)

{

     var event = document.createEvent("Events");

     event.initEvent(type,true,true);

     element.dispatchEvent(event);

}

showMessage.i = 0;

function showMessage(object)

{

     var body = $("body")[0];

     var $p =$("#debugp");

    

     if($p.length==0)

     {

           $p = $("<p/>").attr("id","debugp");

           $(body).prepend($p);

     }

     $p[0].innerHTML += "<br/>"+(showAttribute.i++)+"   |   "+object;

}

showAttribute.i=0;

function showAttribute(object,filter)

{

     var body = $("body")[0];

     var $p =$("#debugp");

    

     if($p.length==0)

     {

           $p = $("<p/>").attr("id","debugp");

           $(body).prepend($p);

     }

     if(getType(filter).indexOf(DataType.string)!=-1)

     {

           for(var a in object)

           {

                 if(a.indexOf(filter)!=-1)

                 {

                      $p[0].innerHTML += a+"   "+object[a]+"<br/>";

                 }

           }

     }

     else if(getType(filter) == DataType.RegExp)

     {

           for(var a in object)

           {

                 if(filter.test(a))

                 {

                      $p[0].innerHTML += a+"   "+object[a]+"<br/>";

                 }

           }

     }

     else if(getType(filter) == DataType.UNDEFINED)

     {

           for(var a in object)

           {

                 $p[0].innerHTML += a+"   "+object[a]+"<br/>";

           }   

     }

     else

     {

           window.console.error(arguments.callee.toString().match(/^function +(.+)\(/)[1]+"第二个参数应传递字符串或正则表达式");

     }

     $p[0].innerHTML +=showAttribute.i+++"--------------------------------------<br/>"

}

function showCollection(collection)

{

     var body = $("body")[0];

     var $p =$("#debugp");

    

     if($p.length==0)

     {

           $p = $("<p/>").attr("id","debugp");

           $(body).prepend($p);

     }

     for(var i=0;i<collection.length;i++)

     $p[0].innerHTML = collection[i]+"    |"+"<br/>" + $p[0].innerHTML;

}

function showLength(collection)

{

     var body = $("body")[0];

     var $p =$("#debugp");

    

     if($p.length==0)

     {

           $p = $("<p/>").attr("id","debugp");

           $(body).prepend($p);

     }

     $p[0].innerHTML = collection.length+"     |"+"<br/>" +      $p[0].innerHTML;

}

function DataType()

{

    

}

DataType.RegExp = "RegExp";

DataType.ObjectString = "Objectstring";

DataType.string = "string";

DataType.NULL = "null";

DataType.UNDEFINED = "undefined";

DataType.ObjectNumber = "Objectnumber";

DataType.number = "number";

DataType.ObjectBoolean = "Objectboolean";

DataType.boolean = "boolean";

DataType.function = "function";

DataType.array = "array";

function getType(type)

{

     if(typeof type == DataType.UNDEFINED)

  {

    return DataType.UNDEFINED;

  }

  else if(typeof type == "object")

  {

    if(type == null)

    {

      return DataType.NULL ;

    }

    else

    {

                

      if(typeof type.valueOf() == DataType.string)

      {

        return DataType.ObjectString

      }

      else if(typeof type.valueOf() == DataType.number)

      {

        return DataType.ObjectNumber;

      }

      else if(typeof type.valueOf() == DataType.boolean)

      {

        return DataType.ObjectBoolean;

      }

      else if(type instanceof Array)

      {

        return DataType.array;

      }

                 else if(type instanceof RegExp)

                 {

                      return DataType.RegExp;

                 }

                 else if(typeof type.constructor == DataType.function)

                 {

                      return type.constructor.toString().match(/^function +(.+)\(/)[1];

                 }

                

    }

  }

  else if(typeof type == DataType.function)

  {

    return DataType.function

 

  }

  else

  {

    return typeof type;

  }

}                         

jQuery-H5-css3转盘抽奖-遁地龙卷风