react（92）--批量删除进行置空操作

  //批量删除
  handleDeleteAll = () => {
    this.props.dispatch({
      type: 'startpage/updateState',
      payload: { selectedRowKeys: [] },
    });
    const { selectedRowKeys } = this.props.startpage;

    if (selectedRowKeys.length === 0) {
      message.error('当前未选择');
      return false;
    }
    this.deletePointsDefinition(selectedRowKeys);
  };