我想将子组件的项从子组件SetState到父组件。

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

const ParentComponent = () => {
  const [items, setItems] = useState([]);

  const addItem = (item) => {
    setItems([...items, item]);
  };

  return (
    <div>
      <ChildComponent addItem={addItem} />
      <ul>
        {items.map((item, index) => (
          <li key={index}>{item}</li>
        ))}
      </ul>
    </div>
  );
};

export default ParentComponent;

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

const ChildComponent = ({ addItem }) => {
  const [item, setItem] = useState('');

  const handleAddItem = () => {
    addItem(item);
    setItem('');
  };

  return (
    <div>
      <input
        type="text"
        value={item}
        onChange={(e) => setItem(e.target.value)}
      />
      <button onClick={handleAddItem}>Add Item</button>
    </div>
  );
};

export default ChildComponent;