按特定形式生成当前日期的函数

//按特定格式生成现在的时间
    vm.getNow = function(days){
        /**
         * days：获取当前天的之前之后的第days天日期
         * 示例：获取当天的，vm.getNow(0)
         * 特殊的天没有考虑，31日,2月等
         * 获取今天时间
         * 格式：2018-07-09 00:00:00
         */
        let nowDate = new Date().toLocaleDateString();
        let nowTime = new Date().toLocaleTimeString();

        let nowDateArr = nowDate.split('/');
        if(parseInt(nowDateArr[1]) < 10){
            nowDateArr[1] = '0'+ nowDateArr[1]
        }
        nowDateArr[2] = parseInt(nowDateArr[2]) + days;

        if(parseInt(nowDateArr[2]) < 10){
            nowDateArr[2] = '0'+ nowDateArr[2]
        }

        nowDate = nowDateArr.join('-');

        if(nowTime.indexOf('下午') > -1){
            nowTime = nowTime.slice(2);
            let nowTimeArr = nowTime.split(':');
            nowTimeArr[0] = parseInt(nowTimeArr[0]) + 12;
            nowTime = nowTimeArr.join(':');
        }else if(nowTime.indexOf('上午') > -1){
            nowTime = nowTime.slice(2);
        }
        return nowDate + ' ' + nowTime;
    }