app.default.firebase 不是 function 错误

Question

I am trying to create a React Native Android app that connects to a Firebase database and getting an error when I get to "let cloud = firebase.database();"我正在尝试创建一个 React Native Android 应用程序，该应用程序连接到 Firebase 数据库，当我到达“let cloud = firebase.database(); to retrieve the data.检索数据。

import { Container, Header, Title, Content, Body, Text, Button, View, H3, Table, Row, Col } from 'native-base';
import React from "react";
import 'firebase/firestore';
import 'firebase/auth';

import firebase from "firebase/app";

const FirebaseConfig = {
    apiKey: "xxx",
    appId: "xxx",
    projectId: "xxx",
    authDomain: "xxx",
    databaseURL: "xxx",
    storageBucket: "xxx",
    messagingSenderId: "xxx",
  }
      
export default class Chat extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      people: [], 
      }        
  }

  async initializeFirebase(){
    if (firebase.apps.length) {
        await firebase.app().delete();
    }
    firebase.initializeApp(FirebaseConfig);
    
  }

  async componentDidMount(){
    this.initializeFirebase();
    let cloud = firebase.database();
    
  }

  render() {
    return <Container>
      <Content>
        <Body>
            <Text>Testing</Text>
            <Text>{this.state.people.length}</Text>
        </Body>
      </Content>
    </Container>;
  }
}

I'm getting the [Unhandled promise rejection: TypeError: _app.default.database is not a function.我收到 [Unhandled promise 拒绝：TypeError: _app.default.database is not a function。 (In '_app.default.database()', '_app.default.database' is undefined)] error. （在 '_app.default.database()' 中，'_app.default.database' 未定义）] 错误。 How do I solve this?我该如何解决这个问题？

Answer 1

You need to import firebase/database :您需要导入firebase/database ：

import 'firebase/database";

app.default.firebase 不是 function 错误

问题描述

1 个解决方案

解决方案1
1 已采纳 2021-02-06 22:54:25

app.default.firebase 不是 function 错误

问题描述

1 个解决方案

解决方案1 1 已采纳 2021-02-06 22:54:25

解决方案1
1 已采纳 2021-02-06 22:54:25