这是我的FirebaseSetup.js档案

import React from 'react';
import firebase from '@react-native-firebase/app';
import auth from '@react-native-firebase/auth';

const firebaseConfig = {
    apiKey: "MyApi",
    authDomain: "MyAuthDomain",
    databaseURL: "DBurl",
    projectId: "PID",
    storageBucket: "...",
    messagingSenderId: "...",
    appId: "...."
}

if(!firebase.app.length){                   //The Problem
    firebase.initializeApp(firebaseConfig); //arises in
    console.log('FireBase Initialized');    //these lines
}

console.log(`FIREBASE INSTANCES : => ${firebase.app.length}`);

export default () => {
    return {firebase,auth}
}

当我评论上述行时，该应用程序运行正常，但未连接到我的firebaseDB

当我取消注释上面提到的行时，它会引发ERROR ....

FirebaseApp name [DEFAULT] already exists! 除了FIREBASE实例显示0为长度。

Atlast我了解我自己无法初始化App ..为什么？