js源代码随机抽奖活动

作者 739

看到网上许多抽奖的代码脚本感觉都不适合，最后自己编写了自己脚本。我的这篇文章希望对你有帮助，有对sky8g网站感兴趣的请关注本网站，谢谢你的支持。

今天使用脚本写了个随机抽奖代码，可以自定义抽奖的类型和哪个类中奖的次数，自定义哪个国家的权重设置，比较完美的抽奖脚本。

废话不多说了直接贴出下面的代码，供参考希望对你有帮助

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var myObj =
{
        "KR":['韩国单号1','韩国单号2','韩国单号3','韩国单号4','韩国单号5','韩国单号6'],
        "JP":['日本单号1','日本单号2','日本单号3','日本单号4','日本单号5','日本单号6'],
        "DE":['德国单号1','韩国单号2','德国单号3','德国单号4','德国单号5','德国单号6'],
        "US":['美国单号1','美国单号2','美国单号3','美国单号4','美国单号5','美国单号6'],
};
 
var a = ['KR','JP','DE','US']; //国家
var b = [0.01,0.02,0.02,0.88]; //权重
 
//如果没设置国家默认只抽奖1次,则为{}空即可。
var countryCount =
{      
        "JP":[3,0],               //第一个是国家的抽奖次数,并且抽奖次数必须小于这个国家的订单数量。第二个是已执行的次数,
        "AU":[1,0],
        'DE':[2,0]
};
var clickMaxTimes =5; //表示最大点击次数且 必须小于国家的数量
var clickCount =0;    //点击的初始状态次数,不可更改
var countryTimes = 1; //可以抽奖的默认次数,不可更改
//submit
function clickme(a,b){
      if(clickCount >= clickMaxTimes ){
          alert('抽奖已经完成！');
          return;
      }
      clickCount++;
      var prize = '';
      var count = Object.keys(myObj).length;
      if(count < 1){
          alert('不能进行抽奖了!');
          return;
      }
      if(count == 1){
        for (q in myObj) {
            if(countryCount[q]){ countryTimes = countryCount[q][0]; }
            var myObjOrder = myObj[q];
            var orderid = myObjOrder[randomNum(0,myObjOrder.length-1)];
            if( countryCount[q] &&  countryCount[q][1] < countryTimes ){
                  if(  countryCount[q][1] == countryTimes -1 ){
                          prize = q+","+orderid;
                          delete myObj[q];
                    }else{
                       myObj[q].splice(myObj[q].indexOf(orderid),1);
                        prize = q+","+orderid;
                    }
                  countryCount[q][1]++;
              }else{
                  prize = q+","+orderid;
                  delete myObj[q];
              }
        }
        return prize;
      }
      var countrycode = countryRandom(a,b);
      var countryOrderArr,countryOrderArrLenth,objCountryCode;
      var i;
      for (i in myObj) {
         if(i == countrycode){
             if(countryCount[i]){ countryTimes = countryCount[i][0]; }
                  countryOrderArr =  myObj[i];
                  objCountryCode  = i;
                  countryOrderArrLenth = myObj[i].length;
                  var orderid = countryOrderArr[randomNum(0,countryOrderArrLenth-1)];
                  var spliceCode = a.indexOf(objCountryCode);
             if( countryCount[i] &&  countryCount[i][1] < countryTimes){
                  if( countryCount[i][1] == countryTimes -1 ){
                             var b_point = b[spliceCode];
                              delete myObj[objCountryCode];
                              a.splice(spliceCode,1);
                              b.splice(spliceCode,1);
                              prize = objCountryCode+","+orderid;
                  }else{
                        myObj[i].splice(myObj[i].indexOf(orderid),1);
                        prize = objCountryCode+","+orderid;
                  }
                  countryCount[i][1]++;
             }else{
                  var b_point = b[spliceCode];
                  delete myObj[objCountryCode];
                  a.splice(spliceCode,1);
                  b.splice(spliceCode,1);
                  prize = objCountryCode+","+orderid;
            }
            return prize;
        }
    }
}
function suiJiSameGaiLv(oneRand,b){
    var arr = [];
    if(arr.constructor  === Array){
        for(h in b){
            if(b[h] == oneRand){  arr.push(parseInt(h));}
        }
    }
    return arr;
}
function countryRandom(arr1, arr2) {
  var sum = 0,
    factor = 0,
    random = Math.random();
  for(var i = arr2.length - 1; i >= 0; i--) {
    sum += arr2[i];
  };
  random *= sum;
  for(var i = arr2.length - 1; i >= 0; i--) {
    factor += arr2[i];
    if(random <= factor)
     return arr1[i];
  };
  return null;
};
function randomNum(minNum,maxNum){
    switch(arguments.length){
        case 1:
            return parseInt(Math.random()*minNum+1,10);
        break;
        case 2:
            return parseInt(Math.random()*(maxNum-minNum+1)+minNum,10);
        break;
            default:
                return 0;
            break;
    }
}
 
//调用的方法
console.log(clickme(a,b));

以上是js源代码写出，有什么问题请留言交流。

 

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