Question

我一直在使用后端的React Native（带有Expo）和Firebase开发一个应用程序。当通过iPhone上的Expo客户端运行项目时，通常可以使用电子邮件和密码登录，然后从Firebase数据库中获取数据。但是，当我使用Facebook登录时，数据库无法读取，并且无法解决任何问题。代码的重要部分如下：

firebase.initializeApp(firebaseConfig);

// This works everywhere
export const login = async (email, password) => {
    await firebase.auth().signInWithEmailAndPassword(email, password);

    const userId = firebase.auth().currentUser.uid;

    return userId + '';
};

export const loginByFacebook = async () => {
  const { type, token } = await Expo.Facebook.logInWithReadPermissionsAsync(FB_APP_ID, {
    permissions: ['public_profile'],
  });

  if (type === 'success') {
    const credential = firebase.auth.FacebookAuthProvider.credential(token);

    try {
      await firebase.auth().signInAndRetrieveDataWithCredential(credential);
    } catch (error) {
      console.log('cannot login ', error);
    }
  }
};

export const readData = (key) => {
  console.log('getWins ');
  const userId = firebase.auth().currentUser.uid;

  return firebase
    .database()
    .ref(`/${key}/${userId}`)
    .once('value');
};

...

class PostList extends React.Component {
    async componentDidMount() {
        // it normally resolves when logged with email & password,
        // resolves with facebook auth on iPhone simulator
        // does not resolve with facebook auth on Expo client on iPhone
        const data = await readData('posts');
    }
}

但是，真正奇怪的是，它不能在iPhone + Expo客户端上运行，但可以在iPhone模拟器上运行。关键部分在async componentDidMount()中。

数据库配置仍处于开发模式（允许所有读取和写入）：

{
    "rules": {
        ".read": true,
        ".write": true
    }
}

我使用了以下指南：https://docs.expo.io/versions/latest/sdk/facebook https://docs.expo.io/versions/latest/guides/using-firebase#listening-for-authentication

我忘了设置其他前提条件吗？还是Expo客户在使用Facebook auth正确处理呼叫方面有局限性？

Firebase数据库不适用于Facebook Expo身份验证

0 个答案: