使用UseState React挂钩从子组件更新父组件状态

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

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

  const updateCount = (newCount) => {
    setCount(newCount);
  };

  return (
    <div>
      <p>Count: {count}</p>
      <ChildComponent updateCount={updateCount} />
    </div>
  );
};

export default ParentComponent;

// 子组件
import React from 'react';

const ChildComponent = ({ updateCount }) => {
  const handleClick = () => {
    updateCount(10); // 调用父组件传递的更新状态的函数
  };

  return (
    <button onClick={handleClick}>Update Count</button>
  );
};

export default ChildComponent;