a-select既能输入也能下拉

                  <a-select
                    v-model:value="record[column.key]"
                    placeholder="请选择"
                    :disabled="record.isDefault"
                    :options="loadingOptions"
                    showSearch
                    mode="SECRET_COMBOBOX_MODE_DO_NOT_USE"
                  ></a-select>

　　mode值设置为 SECRET_COMBOBOX_MODE_DO_NOT_USE