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I'm following https://firebase.google.com/docs/auth/ and want to use FirebaseUI (https://github.com/firebase/FirebaseUI-iOS/tree/master/FirebaseUI) for authentication.

The UI shows successfully and I'm able to click "sign in with google" and then complete the web sign in flow. The app re-opens with the auth url, but the authUI function never fires. What's wrong?

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { // Override point for customization after application launch. FIRApp.configure() let authUI = FIRAuthUI.authUI()!; NSLog("setting up delegate"); authUI.delegate = self; let googleAuthUI = FIRGoogleAuthUI.init(clientID:FIRApp.defaultApp()!.options.clientID); authUI.signInProviders = [googleAuthUI!]; mSplitViewController = self.window!.rootViewController as! UISplitViewController self.window!.rootViewController = authUI.authViewController(); return true } func authUI(authUI: FIRAuthUI, didSignInWithUser user: FIRUser?, error:NSError?) { // Implement this method to handle signed in user or error if any. NSLog("logged in"); self.window!.rootViewController = mSplitViewController let navigationController = mSplitViewController!.viewControllers[mSplitViewController!.viewControllers.count-1] as! UINavigationController navigationController.topViewController!.navigationItem.leftBarButtonItem = mSplitViewController!.displayModeButtonItem() mSplitViewController!.delegate = self let masterNavigationController = mSplitViewController! .viewControllers[0] as! UINavigationController let controller = masterNavigationController.topViewController as! MasterViewController controller.managedObjectContext = self.managedObjectContext } func application(application: UIApplication, openURL url: NSURL, options: [String: AnyObject]) -> Bool { NSLog("opened with url \(url)"); FIRAuthUI.authUI()!.delegate = self; return FIRAuthUI.authUI()!.handleOpenURL(url, sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey] as! String); }
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    I feel you. I am trying to set this up too. Documentation is horrible for this, but then, it is still beta. Commented May 26, 2016 at 5:39
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    Feel your pain as well. Don't think this is very useable yet. The old way is just as good and actually easier to comprehend Commented May 26, 2016 at 23:04

3 Answers 3

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Is your AppDelegate a FIRAuthUIDelegate?

Anyway, instead of using delegates, you can make use of FIRAuth listener: func addAuthStateDidChangeListener(listener: FIRAuthStateDidChangeListenerBlock) -> FIRAuthStateDidChangeListenerHandle

You can use it this way:

FIRAuth.auth()?.addAuthStateDidChangeListener { (auth, user) in if user != nil { print("user signed in") } }

You can see a working sample on https://github.com/cooliopas/FirebaseAuth-Demo

Its in spanish, but I'm sure you will understand the code.

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I haven't tried this solution but this StackOverflow problem was linked to the FirebaseUI repo's issues section and someone there responded;

Obj-C: "There's a bug that prevents [[FIRAuthUI authUI] authViewController] from being used as the root view controller of your app. The workaround is to use a placeholder view controller as your app's root view controller, then present [[FIRAuthUI authUI] authViewController] on top of it."

for Swift users: There's a bug that prevents FIRAuthUI.authUI().authViewController() from being used as the root view controller of your app. The workaround is to use a placeholder view controller as your app's root view controller, then present FIRAuthUI.authUI().authViewController() on top of it.

Link: https://github.com/firebase/FirebaseUI-iOS/issues/65

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Essentially you need to add the below to the root of the plist.

<key>CFBundleURLTypes</key> <array> <dict> <key>CFBundleURLSchemes</key> <array> <string>com.googleusercontent.apps.your-app-id</string> </array> </dict> </array>

You can get your app id from the RESERVED_CLIENT_ID entry in your GoogleService-Info.plist file.

Next, you will need to implement the openURL app delegate method like this:

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool { return GIDSignIn.sharedInstance().handle(url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String, annotation: options[UIApplicationOpenURLOptionsKey.annotation]) }

Check out my answer here for some more details.

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