在反应本机上调用 firebase.initializeApp() 问题

Question

我已经使用这个 npx react-native init --template @react-native-firebase/template MyAwesomeApp 创建了反应应用程序，然后设置了 firebase 一切正常，直到我遇到错误：

没有 Firebase 应用程序“[DEFAULT]”已创建 - 调用 firebase.initializeApp()。

下面是我的 App.js 代码

import React from 'react';
import firestore from '@react-native-firebase/firestore';

const usersCollection = firestore().collection('Food');


function Addfood()  { 
  usersCollection
.add({
  color: "White",
  name: "None"
})
};
const App = () => {
  return (
    <View>
      <Addfood/>
      <Text>Test2</Text>
    </View>

  );
};

const styles = StyleSheet.create({
  scrollView: {
    backgroundColor: Colors.lighter,
  },
  engine: {
    position: 'absolute',
    right: 0,
  },
  body: {
    backgroundColor: Colors.white,
  },
  sectionContainer: {
    marginTop: 32,
    paddingHorizontal: 24,
  },
  sectionTitle: {
    fontSize: 24,
    fontWeight: '600',
    color: Colors.black,
  },
  sectionDescription: {
    marginTop: 8,
    fontSize: 18,
    fontWeight: '400',
    color: Colors.dark,
  },
  highlight: {
    fontWeight: '700',
  },
  footer: {
    color: Colors.dark,
    fontSize: 12,
    fontWeight: '600',
    padding: 4,
    paddingRight: 12,
    textAlign: 'right',
  },
});

export default App;

Answer 1

您可以将您的 firebase 逻辑放在一个单独的文件中，而不是将其放在 app.js 中，如果您只是想测试它，我编辑了您的代码并添加了初始化。

import React from 'react';
import firestore,{firebase} from '@react-native-firebase/firestore';

 //here add your credentials 
firebase.initializeApp({
  appId: '',
  apiKey: '',
  projectId: '',
  databaseURL: '',
  storageBucket: '',
  messagingSenderId: '',
  clientId: '',
});
const usersCollection = firestore().collection('Food');


function Addfood()  { 
  usersCollection
.add({
  color: "White",
  name: "None"
})
};
const App = () => {
  return (
    <View>
      <Addfood/>
      <Text>Test2</Text>
    </View>

  );
};

const styles = StyleSheet.create({
  scrollView: {
    backgroundColor: Colors.lighter,
  },
  engine: {
    position: 'absolute',
    right: 0,
  },
  body: {
    backgroundColor: Colors.white,
  },
  sectionContainer: {
    marginTop: 32,
    paddingHorizontal: 24,
  },
  sectionTitle: {
    fontSize: 24,
    fontWeight: '600',
    color: Colors.black,
  },
  sectionDescription: {
    marginTop: 8,
    fontSize: 18,
    fontWeight: '400',
    color: Colors.dark,
  },
  highlight: {
    fontWeight: '700',
  },
  footer: {
    color: Colors.dark,
    fontSize: 12,
    fontWeight: '600',
    padding: 4,
    paddingRight: 12,
    textAlign: 'right',
  },
});

export default App;