以不可变的方式更新子组件中父组件的状态

import React, { useState } from 'react';

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

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

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

import React from 'react';

function ChildComponent(props) {
  const handleClick = () => {
    // 更新父组件的状态
    props.updateCount(10);
  };

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