来自子组件的React更改状态不起作用

// 父组件
import React, { useState } from 'react';
import ChildComponent from './ChildComponent';

const ParentComponent = () => {
  const [state, setState] = useState('');

  const handleStateChange = (newState) => {
    setState(newState);
  };

  return (
    <div>
      <ChildComponent onStateChange={handleStateChange} />
      <p>当前状态：{state}</p>
    </div>
  );
};

export default ParentComponent;

// 子组件
import React from 'react';

const ChildComponent = ({ onStateChange }) => {
  const handleClick = () => {
    onStateChange('新的状态');
  };

  return (
    <button onClick={handleClick}>更改状态</button>
  );
};

export default ChildComponent;