如何将状态数据传递给其他组件

// 确保使用setState来更新状态
this.setState({ key: newValue }, () => {
  // 回调函数确保状态更新完成
});

// 如果使用React Hooks
const [state, setState] = useState(initialState);
setState(prevState => ({ ...prevState, key: newValue }));

// 使用Context API
const MyContext = React.createContext();

class App extends React.Component {
  state = { data: 'some data' };

  render() {
    return (
      <MyContext.Provider value={this.state.data}>
        <ChildComponent />
      </MyContext.Provider>
    );
  }
}

function ChildComponent() {
  return (
    <MyContext.Consumer>
      {data => <div>{data}</div>}
    </MyContext.Consumer>
  );
}

// 使用Redux进行状态管理
import { createStore } from 'redux';

const initialState = { count: 0 };

function reducer(state = initialState, action) {
  switch (action.type) {
    case 'INCREMENT':
      return { count: state.count + 1 };
    default:
      return state;
  }
}

const store = createStore(reducer);

store.subscribe(() => {
  console.log(store.getState());
});

store.dispatch({ type: 'INCREMENT' });