当使用Antd Tree进行搜索时，可能会遇到搜索结果未展开子列表子项的问题。解决方法是在onSearch事件触发时，手动展开包含匹配值的子列表。

代码示例：

import React, { useState } from 'react';
import { Tree } from 'antd';

const { TreeNode } = Tree;

const treeData = [
  {
    title: 'parent 1',
    key: '0-0',
    children: [
      {
        title: 'child 1',
        key: '0-0-0',
        children:[
          {
            title: 'grand child 1',
            key: '0-0-0-0',
          }
        ]
      },
      {
        title: 'child 2',
        key: '0-0-1',
      },
    ],
  },
  {
    title: 'parent 2',
    key: '0-1',
    children: [
      {
        title: 'child 3',
        key: '0-1-0',
      },
      {
        title: 'child 4',
        key: '0-1-1',
        children:[
          {
            title: 'grand child 2',
            key: '0-1-1-0',
          }
        ]
      },
    ],
  },
];

const SearchableTree = ({treeData}) => {
  const [expandedKeys, setExpandedKeys] = useState([]);

  const onSearch = (value) => {
    if (value) {
      const expandedKeys = treeData
        .map((item) => {
          if (item.title.includes(value)) {
            return getParentKey(item.key, treeData);
          }
          return null;
        })
        .filter((item, i, self) => item && self.indexOf(item) === i);

      setExpandedKeys(expandedKeys);
    } else {
      setExpandedKeys([]);
    }
  };

  const getParentKey = (key, tree) => {
    let parentKey;
    for (const node of tree) {
      if (node.children) {
        if (node.children.some((item) => item.key === key)) {
          parentKey = node.key;
        } else if