如何在React中访问子useState？

// 子组件
import React, { useState } from 'react';

const ChildComponent = () => {
  const [count, setCount] = useState(0);

  return (
    <div>
      <button onClick={() => setCount(count + 1)}>增加</button>
      <p>计数：{count}</p>
    </div>
  );
};

export default ChildComponent;

// 父组件
import React from 'react';
import ChildComponent from './ChildComponent';

const ParentComponent = () => {
  const handleChildState = (childState) => {
    console.log('子组件的状态：', childState);
    // 在这里可以访问子组件的useState
  };

  return (
    <div>
      <h1>父组件</h1>
      <ChildComponent onStateChange={handleChildState} />
    </div>
  );
};

export default ParentComponent;