var dcname = 'HNHN.QJNYGSZM.DRFDL.SKCAL';
var starttime = '2022-02-01&23:59:59';
var endtime = '2022-03-01&23:59:59';
var interval =1440;
$.ajax({
type : 'get',
url : "/api/rtdb/his?tagnames="+dcname+"&starttime="+starttime+"&endtime="+endtime+"&interval="+interval,
async : false,//同步/异步
contentType : "application/x-www-form-urlencoded;",
dataType : 'text',
success:function(data) {
var _result = data;
for(var i =0;i<_result.length;i++){
console.log(_result[i].value)
}
}
});
{"time":"2022-02-02T00:00:00+08:00","status":1,"value":248.79296875}
现在这样写打印出来的是undefined,要怎么改才能获取上面数据里的value字段的值