我需要幫助，因為我收到以下錯誤：警告：無法對未安裝的組件執行 React 狀態更新。這是一個空操作，但它表明您的應用程序中存在內存泄漏。要修復，請取消 componentWillUnmount 方法中的所有訂閱和異步任務。在 createCategory 中（在 themeProvider.js:39）/* Imports */    import React, { useContext, useState, useEffect } from 'react';    import AsyncStorage from '@react-native-community/async-storage';    import THEMES from '@app/theme/themes.json';    /* /Imports/ */    const STORAGE_KEY = 'THEME_ID';    const ThemeContext = React.createContext();    /* Exports */    export const ThemeContextProvider = ({ children }) => {      const [themeID, setThemeID] = useState();      useEffect(() => {        (async () => {          const storedThemeID = await AsyncStorage.getItem(STORAGE_KEY);          if (storedThemeID) setThemeID(storedThemeID);          else setThemeID(THEMES[1].key);        })();      }, []);      return (        <ThemeContext.Provider value={{ themeID, setThemeID }}>          {!!themeID ? children : null}        </ThemeContext.Provider>      );    };    export function withTheme(Component) {      function TargetComponent(props) {        const { themeID, setThemeID } = useContext(ThemeContext);        const getTheme = themeID => THEMES.find(theme => theme.key === themeID);        const setTheme = themeID => {          AsyncStorage.setItem(STORAGE_KEY, themeID);          setThemeID(themeID);        };        return (          <Component            {...props}            themes={THEMES}            theme={getTheme(themeID)}            setTheme={setTheme}          />        );      }      TargetComponent.navigationOptions = Component.navigationOptions;      return TargetComponent;      }    /* /Exports/ */