Material-UI select设置树结构

要在Material-UI的Select组件中使用树结构，你可以使用Recursive Tree组件。以下是一个示例代码：

import React from 'react';
import PropTypes from 'prop-types';
import { makeStyles } from '@material-ui/core/styles';
import TreeView from '@material-ui/lab/TreeView';
import TreeItem from '@material-ui/lab/TreeItem';
import ExpandMoreIcon from '@material-ui/icons/ExpandMore';
import ChevronRightIcon from '@material-ui/icons/ChevronRight';
import FormControl from '@material-ui/core/FormControl';
import InputLabel from '@material-ui/core/InputLabel';
import Select from '@material-ui/core/Select';

const data = {
  id: 'root',
  name: 'Parent Node',
  children: [
    {
      id: '1',
      name: 'Child Node 1',
      children: [
        {
          id: '2',
          name: 'Subchild Node 1',
        },
        {
          id: '3',
          name: 'Subchild Node 2',
        },
      ],
    },
    {
      id: '4',
      name: 'Child Node 2',
      children: [
        {
          id: '5',
          name: 'Subchild Node 3',
        },
        {
          id: '6',
          name: 'Subchild Node 4',
        },
      ],
    },
  ],
};

const useStyles = makeStyles({
  root: {
    height: 240,
    flexGrow: 1,
    maxWidth: 400,
  },
});

function renderTreeItems(items) {
  return (
    <>
      {items.map((item) => (
        <TreeItem key={item.id} nodeId={item.id} label={item.name}>
          {Array.isArray(item.children) ? renderTreeItems(item.children) : null}
        </TreeItem>
      ))}
    </>
  );
}

function RecursiveTreeView(props) {
  const classes = useStyles();
  const { onChange, value } = props;

  const handleChange = (event) => {
    onChange(event.target.value);
  };

  return (
    <FormControl className={classes.formControl}>
      <InputLabel htmlFor="tree-select">Select</InputLabel>
      <Select
        native
        value={value}
        onChange={handleChange}
        inputProps={{
          name: 'tree-select',
          id: 'tree-select',
        }}
      >
        <option value="" />
        {renderTreeItems([data])}
      </Select>
    </FormControl>
  );
}

RecursiveTreeView.propTypes = {
  onChange: PropTypes.func.isRequired,
  value: PropTypes.string.isRequired,
};

export default function SelectWithTree() {
  const [value, setValue] = React.useState('');

  const handleChange = (newValue) => {
    setValue(newValue);
  };

  return (
    <RecursiveTreeView onChange={handleChange} value={value} />
  );
}

在这个示例中，我们首先定义了一个树形数据结构，然后使用`renderTreeItems()`函数递归渲染树形结构。最后，在`RecursiveTreeView`组件中，我们使用`FormControl`和`Select`组件来显示树形结构，并在选择时触发`onChange`事件。你可以根据自己的需要来修改这个示例。