有没有可能在不传入函数的情况下，通过外部函数或在子容器中更改容器的状态？

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

// 创建一个Context
const MyContext = React.createContext();

// 定义reducer函数
const reducer = (state, action) => {
  switch (action.type) {
    case 'UPDATE':
      return { ...state, ...action.payload }; // 更新状态
    default:
      return state;
  }
};

// 父组件
const ParentComponent = () => {
  const [state, dispatch] = useReducer(reducer, { count: 0 });

  // 外部函数，通过dispatch来更新状态
  const updateState = () => {
    dispatch({ type: 'UPDATE', payload: { count: state.count + 1 } });
  };

  return (
    <MyContext.Provider value={{ state, dispatch }}>
      <ChildComponent />
      <button onClick={updateState}>更新状态</button>
    </MyContext.Provider>
  );
};

// 子组件
const ChildComponent = () => {
  const { state, dispatch } = useContext(MyContext);

  // 在子容器中更改容器的状态
  const updateState = () => {
    dispatch({ type: 'UPDATE', payload: { count: state.count + 1 } });
  };

  return (
    <div>
      <p>当前状态：{state.count}</p>
      <button onClick={updateState}>在子容器中更改状态</button>
    </div>
  );
};

// 使用示例
const App = () => {
  return <ParentComponent />;
};

export default App;