MultiAccountOAuth

MultiAccountOAuth allows you to login to multiple Google OAuth accounts simultaneouly.

<img src="img/screenshot.png" width="375" height="667"/>

While developing PickedMail - The personal AI Inbox, we need to support user login to multiple Google accounts simultaneously. However, Google iOS SDK only allows user to sign in to one account at a time. As a result, we developed a framework to allow us to sign in and maintain connection status to multiple Google accounts. This framework is open sourced to help others who struggling through the same problem.

Install

pod 'MultiAccountOAuth'

Requirements

• Swift 3.0+
• Xcode 8.0+
• iOS 9.0+, OSX 10.10+

Usage

Login to an Google Account

public func signin(controller: UIViewController, completion: ((_ success: Bool, _ user: GoogleUserInstance?, _ error: String?) -> ())?)

Login to multiple Google accounts

public func signin(controller: UIViewController, completion: ((_ success: Bool, _ user: GoogleUserInstance?, _ error: String?) -> ())?)

Get access to all of them

public var authenticatedUsers = [GoogleUserInstance]()

Next time when the user launches the app, sign in to all the Google accounts from background.

public func signinAllUsersSilently(completion: @escaping ()->() = {})

Step by Step Setup Guide

1. Google Credential

• Create an iOS Applicaiton in Google API Console. Make sure you have the correct client id and URL scheme.

<img src="img/instruction1.png" width="888" height="194"/>

• Go to Info.plist in your iOS application, add the URL scheme to URL types.

<img src="img/instruction2.png" width="1080" height="99"/>

2. AppDelegate.swift

Configure the google client id and URL scheme. You can optionally provide a server client id if you'd like to enable backend sever access.

import UIKit
import MultiAccountOAuth

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        OauthManager.sharedInstance.configure(cliendId: "269767058620-boug6i0q16vsh7a90cf7341skc1j91sj.apps.googleusercontent.com", scope: ["email"], urlScheme: "com.googleusercontent.apps.269767058620-boug6i0q16vsh7a90cf7341skc1j91sj", serverCliendId: nil)

        return true
    }

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        if let oauthSession = OauthManager.sharedInstance.oauthSession {
            if oauthSession.resumeAuthorizationFlow(with: url) {
                OauthManager.sharedInstance.oauthSession = nil
                return true
            }
        }
        return false
    }
}

The list of Google Scopes to choose from

• https://developers.google.com/identity/protocols/googlescopes