[react native] firebase database를 이용한 메모장 앱 만들기
import { StatusBar } from 'expo-status-bar'; import React, { useState, useRef, useEffect } from 'react'; import {TextInput, SafeAreaView, FlatList, Button, StyleSheet, Text, View } from 'react-native'; import * as firebase from 'firebase'; var firebaseConfig = { apiKey: "--", authDomain: "--", projectId: "--", storageBucket: "--", messagingSenderId: "--", appId: "--" }; if(firebase.apps.length==..