LegendQuery

var legend_query = KQ.Query.LegendQuery.getInstance();
console.log(legend_query);
try {
   var options = {
     url: 'http://172.16.1.157:8699/KQGis/rest/services/zy',
     layerId: 137,
   };

   legend_query.queryAsync(options,
     function query_good () {
       console.log('query_good');

       var data = legend_query.data();
       console.log('legend query data.length:' + data.length);

       data.forEach(function (d) {
         console.log(d.properties);
       })
     },
     function query_error () {
       console.log('query_error');
     });
 }
catch (e) {
   console.log('catch error:' + e);
 }