在同一组件中结合使用useReducer和useState

import React, { useReducer, useState } from 'react';

// 定义reducer函数
const reducer = (state, action) => {
  switch (action.type) {
    case 'increment':
      return { count: state.count + 1 };
    case 'decrement':
      return { count: state.count - 1 };
    default:
      throw new Error();
  }
};

const Counter = () => {
  // 使用useReducer管理复杂的状态逻辑
  const [state, dispatch] = useReducer(reducer, { count: 0 });

  // 使用useState管理简单的状态
  const [name, setName] = useState('');

  const handleIncrement = () => {
    dispatch({ type: 'increment' });
  };

  const handleDecrement = () => {
    dispatch({ type: 'decrement' });
  };

  const handleNameChange = (event) => {
    setName(event.target.value);
  };

  return (
    <div>
      <p>Count: {state.count}</p>
      <button onClick={handleIncrement}>Increment</button>
      <button onClick={handleDecrement}>Decrement</button>
      <input type="text" value={name} onChange={handleNameChange} />
      <p>Hello, {name}!</p>
    </div>
  );
};

export default Counter;