code: function () {
              var _this = this;
  
              if(!_this.listEnd && !this.isLoadingData) {
                  this.isLoadingData = true;
                  var url = editor.getActionUrl(editor.getOpt('imageManagerActionName')),
                      isJsonp = utils.isCrossDomainUrl(url);
                  ajax.request(url, {
                      'timeout': 100000,
                      'dataType': isJsonp ? 'jsonp':'',
                      'data': utils.extend({
                              start: this.listIndex,
                              size: this.listSize
                          }, editor.queryCommandValue('serverparam')),
                      'method': 'get',
                      'onsuccess': function (r) {
                          try {
                              var json = isJsonp ? r:eval('(' + r.responseText + ')');
                              if (json.state == 'SUCCESS') {
                                  _this.pushData(json.list);
                                  _this.listIndex = parseInt(json.start) + parseInt(json.list.length);
                                  if(_this.listIndex >= json.total) {
                                      _this.listEnd = true;
                                  }
                                  _this.isLoadingData = false;
                              }
                          } catch (e) {
                              if(r.responseText.indexOf('ue_separate_ue') != -1) {
                                  var list = r.responseText.split(r.responseText);
                                  _this.pushData(list);
                                  _this.listIndex = parseInt(list.length);
                                  _this.listEnd = true;
                                  _this.isLoadingData = false;
                              }
                          }
                      },
                      'onerror': function () {
                          _this.isLoadingData = false;
                      }
                  });
              }
          }
docs: /* 向后台拉取图片列表数据