我使用useReducer钩子来制作自定义的react钩子，但在下面的代码中，我无法更新im从调度程序函数接收到的状态

import React, { useReducer } from 'react';

// 定义调度程序函数
const reducer = (state, action) => {
  switch (action.type) {
    case 'INCREMENT':
      return { count: state.count + 1 };
    case 'DECREMENT':
      return { count: state.count - 1 };
    default:
      return state;
  }
};

// 自定义钩子
const useCustomHook = () => {
  const [state, dispatch] = useReducer(reducer, { count: 0 });

  // 定义处理动作的函数
  const increment = () => {
    dispatch({ type: 'INCREMENT' });
  };

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

  return {
    count: state.count,
    increment,
    decrement,
  };
};

// 在组件中使用自定义钩子
const MyComponent = () => {
  const { count, increment, decrement } = useCustomHook();

  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={increment}>Increment</button>
      <button onClick={decrement}>Decrement</button>
    </div>
  );
};