Firebase + React Native: Offline Authentication

Question

I use Firebase in a React Native iOS application, mainly for storing user data and user authentication, which works great when the device actually has a working network connection .

When it comes to the standalone capabilities of Firebase, it looks like this:

Problem: users running the application without a network connection cannot do anything because they never logged in

Here are the steps to reproduce this behavior:

Step 1: A user with a disconnected user launches an application with a network connection

• user clicks the "Login to Facebook" button
• Firebase register using auth function
• onAuthStateChanged (user)called with a registered user as parameter Lecture
• received with the help user.getToken(), is sent to my server, which generates a user token ( generatedToken), which can be used to sign in Firebase auth with signInWithCustomToken (generatedToken)and therefore is stored in local storage
• the user happily reads and writes to the Firebase database, the changes are instantly synchronized with the Firebase server.

Step 2: The recorded user starts the application with a network connection

• the application implements there generatedTokenin local storage
• generatedToken is used for firebase.auth().signInWithCustomToken (..)
• (similar to step 1.3)
• (similar to step 1.4)
• (similar to step 1.5)
• : (onAuthStateChanged (user) null user, ) Firebase
• . Firebase.

3:

• generatedToken
• generatedToken firebase.auth().signInWithCustomToken (..)
• firebase.auth().signInWithCustomToken (..) ,
• onAuthStateChanged (user) null user
• Firebase , -

• persistenceEnabled true Objective-C/AppDelegate.m, FIRApp:

  (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  {
    // ...
    [FIRApp configure];
    [FIRDatabase database].persistenceEnabled = YES;
    // ...
  }
  

  ( , ) , Firebase.

• --- ---

!

Answer 1

-sdk RN . , Firebase JS SDK native, , , :

Firebase Web SDK JS, ( ).

SDK firebase 2-3 , -SDK.

, -SDK Android ios. :

• AdMob
• FCM/Messaging
• /
• Firebase
• Google Analytics
• /SMS

sdk android/ios firebase js- (.. ).

, , :

react-native-firebase, , sdk api js , , sdk android ios firebase. jb firebase, , , , -sdk.

:

import firebase from 'react-native-firebase';

const instance = firebase.initializeApp({
  persistence: true
});

// can also use `keepSynced` / `setPersistence` methods:
// instance.database().ref('/someref').keepSynced();
// instance.database().setPersistence(true);

export default instance;

Hide result

( : --firebase)