我在我的 React Native 應用程序中使用 Firebase AdMob，當用戶點擊特殊按鈕時，應該會顯示一個獎勵廣告單元。這個按鈕組件和調用廣告橫幅的功能是在單獨的文件中實現(xiàn)的。因此，我的函數(shù)需要返回一個值，以顯示用戶是否已觀看完整廣告并獲得獎勵。但是我不知道如何在rewarded.onAdEvent事件以 . 結束后返回值type === RewardedAdEventType.EARNED_REWARD。我的函數(shù)有一個調用廣告和我的按鈕組件的示例：Ads.js 片段const showRewarded = () => {    const rewarded = RewardedAd.createForAdRequest(UNIT_ID, {      requestNonPersonalizedAdsOnly: false,    });    const eventListener = rewarded.onAdEvent((type, error, reward) => {      if(type === RewardedAdEventType.LOADED) {        rewarded.show();      }      if(type === RewardedAdEventType.EARNED_REWARD) {        return reward;      }      // The reward should be null if user skiped the ad      return null;     });     rewarded.load();    // Wait for event completion  }按鈕.jsimport React from 'react';import {  View,  Text,  TouchableOpacity} from 'react-native';;import { Ads } from '../components';class MyButton extends React.Component {  constructor(props) {    super(props);  }  showAd() {    // Wait while user has not been get a reward (or skiped the ad)    const reward = Ads.showRewarded();    console.log(`The reward is ${reward}`);  }  render() {    return (      <View>      <TouchableOpacity onPress={() => this.showAd()}>        <Text>Show Ad to get a reward</Text>      </TouchableOpacity>      </View>    )  }}export default MyButton;