如何进行取决于另一个调用设置的值的 API 调用？

Question

我有一个登录功能，我正在设置一个令牌，该令牌保存在 redux 存储中，然后，在登录发生后，我需要再次调用 api，它将向主屏幕提供数据。但为了打这个电话，我需要令牌。

这是我需要调用的主屏幕组件：

// imports

import styles from '../../styles/HomeScreenStyles';
import { passengersDataAction } from './actions/homeScreen';

class HomeScreen extends Component {
  static navigationOptions = {
    header: null,
  };

  componentDidMount() {
    this.GetPassengersData();
  }

  GetPassengersData = async () => {
    // userToken is coming from the store
    const { passengersDataActionHandler, userToken } = this.props;
    if (userToken && userToken !== null) {
      try {
        const response = await fetch(
          'http://myAPI/public/api/getPassengers',
          {
            method: 'POST',
            headers: {
              Authorization: `Bearer ${userToken}`,
              Accept: 'application/json',
              'Content-Type': 'application/json',
            },
          },
        );
        const responseJson = await response.json();
          passengersDataActionHandler(responseJson.success.data);      
      } // catch ...
    }
  };

  render() {
    return <TabView style={styles.container} />;
  }
}

// export

到GetPassengersData 被调用时，userToken 还不存在，所以我的请求直接转到 catch 错误回调。

我该如何处理？

编辑： 我在上面放置的 API 调用是我需要令牌的地方。

调用获取登录数据：

import { Alert, AsyncStorage } from 'react-native';
import { has } from 'lodash';
import PropTypes from 'prop-types';

const FetchLoginData = async (
  username,
  password,
  navigation,
  userTokenActionHandler,
) => {
  try {
    const response = await fetch(
      'http://myAPI/public/api/driverlogin',
      {
        method: 'POST',
        headers: {
          Accept: 'application/json',
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({ email: username, password }),
      },
    );
    const responseJson = await response.json();
    if (has(responseJson, 'error')) {
      Alert.alert('Error', 'Please check your credentials.');
    } else {
      // HERE I SET THE TOKEN
      await AsyncStorage.setItem('userToken', responseJson.success.token);
      userTokenActionHandler(responseJson.success.token);
      navigation.navigate('App');
    }
  } catch (error) {
    Alert.alert(
      'Error',
      'There was an error with your request, please try again later.',
    );
  }
};

FetchLoginData.propTypes = {
  navigation: PropTypes.shape({}).isRequired,
  userTokenActionHandler: PropTypes.func.isRequired,
};

export default FetchLoginData;

Answer 1

您可以在这里拨打第二个电话：

try {
    const response = await fetch(
      'http://myAPI/public/api/getPassengers',
      {
        method: 'POST',
        headers: {
          Authorization: `Bearer ${userToken}`,
          Accept: 'application/json',
          'Content-Type': 'application/json',
        },
      },
    );
   const responseJson = await response.json();
      passengersDataActionHandler(responseJson.success.data);  

   // **put second call here you have token here send it to second api call**

  }