antd table 树形数据动态加载

antd 的 table 组件支持树形结构的数据,不过前提是需要将整棵树的数据一次性全部返回,对于数据量比较大的情况下,可能会需要动态加载数据。

export default function DynamicTable() {
  const [loading, setLoading] = useState(false);
  const [list, setList] = useState([]);
  
  const getList = useCallback(
    async () => {
      setLoading(true);
      const res: any = await getTableData();
      setLoading(false);
        const tableData = res.data;
        // 默认都有children,方便table生成展开功能
        tableData?.map((item: any) => {
          item.children = [];
          return item;
        });
        setList(tableData);
    },
    []
  );

  useEffect(() => {
    getList();
  }, [getList]);

  const onExpand = async (expanded: boolean, record: any) => {
    //expanded是否展开  record每一项的值
    const id = record.id;
    const pList = list;
    if (!expanded) return;
    if (record.children?.length > 0) return;
    const data = { pid: [id] };
    const res: any = await getTableData(data);
    setLoading(false);
    let tableData = res.data || [];
    // 递归遍历查找当前项,并将children插入
    const dataMap = (items: any) => {
      items.find((item: any) => {
        if (item.id === id) {
          item.children = tableData;
          return item;
        }
        if (item.children?.length > 0) {
          dataMap(item.children);
        }
      });
    };
    dataMap(pList);
    setList([...pList]);
  };
    
  return (
    <Table
      columns={columns}
      dataSource={list}
      size="middle"
      loading={loading}
      rowKey={(record: any) => record.id}
      pagination={false}
      expandIcon={({ expanded, onExpand, record }) => {
        //expanded-是否可展开, onExpand-展开事件默认, record-每一项的值 设置自定义图标
        if (record.level < 3) {
          //第一和第二层级才有图标(根据自己的额业务需求变动)
          if (expanded) {
            //根据是否可以展开判断
            return <MinusSquareOutlined onClick={(e) => onExpand(record, e)} />;
          } else {
            return <PlusSquareOutlined onClick={(e) => onExpand(record, e)} />;
          }
        } else {
          return null;
        }
      }}
      indentSize={30}
      onExpand={onExpand}
    />
  );
}

 

posted @ 2022-11-10 19:57  shellon  阅读(2091)  评论(4编辑  收藏  举报