jeecg select应用

 <j-dict-select-tag
                v-decorator="['isNeedTengtui', validatorRules.isNeedTengtui]"
                :triggerChange="true"
                placeholder="请选择是否违建"
                dictCode="yn_flag"
                style="width:75%"
                @change="handleNeedTengtui"
              />
              
               handleNeedTengtui(e) {
      this.isNeedTengtui = e
    },
    
    以这个isNeedTengtui 控制其他显示