/**
* 完成抽奖动作，返回抽奖结果
* @return array 抽奖结果
*/
public function loterry()
{
$tmpArr = array();
$db = new DbConn();
foreach ($this->prizeArr as $k => $v) {
$tmpArr[$v['id']] = $v['v'];
}
do {
$prizeId = $this->getPrizeId($tmpArr);
// 奖项id
$nums = $db->countByPid($prizeId);
// 查询已获取当前奖项的人数
} while ($nums >= $this->prizeArr[$prizeId - 1]['num']);
//$prizeId = $this->getPrizeId($tmpArr); // 奖项id
//$angle = $this->getRotation($this->prizeArr[$prizeId-1]); // 旋转角度
// 插入数据库，记录用户中奖情况
$db->add($this->uid, $prizeId, $this->prizeArr[$prizeId - 1]['prize'], time());
return array('prize' => $prizeId);
}