iOS swift You must specify clientID Exception in google integration - ios

Question

Code:
let signIn = GPPSignIn.sharedInstance()
signIn.shouldFetchGooglePlusUser = true
signIn.clientID = "912597493260-qg351fl8olmnmjl8qobos8n6u909jp0o.apps.googleusercontent.com"
signIn.scopes = [kGTLAuthScopePlusLogin];
signIn.trySilentAuthentication();
GIDSignIn.sharedInstance().signInSilently()
signIn.delegate = self
due to uncaught exception 'NSInvalidArgumentException', reason: 'You must specify |clientID| for |GIDSignIn|
I double checked my code.Even i set client-id getting this exception.Where i went wrong?any help will be appreciated.thanks in advance

Answer 1

I was following Google's own guide for adding Sign-In here. I followed it step by step - integrated the google configuration file too. As per the guide, if the configuration file was included, setting the client id manually was not required. Unfortunately, I encountered exactly the same error when I run the app and hit the Sign-In button:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'You must specify |clientID| for |GIDSignIn|'
Solution:
For some reason, clientID was not automatically picked from the configuration file. We should instead configure the GIDSignIn object directly, (using the client ID found in the GoogleService-Info.plist file) in the app delegate's application:didFinishLaunchingWithOptions: method:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Initialize sign-in
var configureError: NSError?
GGLContext.sharedInstance().configureWithError(&configureError)
assert(configureError == nil, "Error configuring Google services: \(configureError)")
GIDSignIn.sharedInstance().clientID = "Cliend id From GoogleService-Info.plist file"
GIDSignIn.sharedInstance().delegate = self
return true
}
Also, if you are using Firebase, you can do it this way too:
GIDSignIn.sharedInstance().clientID = FirebaseApp.app()?.options.clientID

Answer 2

It looks like the auto-generated config file, GoogleService-Info.plist, will include the wrong credentials by default; it includes the Web Client credentials instead of the iOS app credentials.
You need to correct the Client ID and the Reverse Client ID in the GoogleService-Info.plist.
Since these credentials are also used in your app's URLSchemes, you need to correct this there too.

Answer 3

I was also facing the same issue. I followed every step as per the documentation by https://firebase.google.com/docs/auth/ios/google-signin#swift_9 .
At last, I tried adding Client ID manually on my Controller's viewDidLoad and it worked after a long struggle.
Refer the code below. Replace your project specific Client-ID from GoogleService-info.plist in place of ClientID :
class IntroController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
GIDSignIn.sharedInstance().clientID = "*ClientID*"
GIDSignIn.sharedInstance()?.presentingViewController = self
GIDSignIn.sharedInstance().signIn()
}
}

Answer 4

The clientId definitely does get picked up from the .plist file. If it appears not to be, it is likely that your code is attempting to use the sign-in object before it has been properly configured. Set a breakpoint on your configureWithError line, and make sure that it gets hit before any attempt to set a delegate, perform silent sign-in, etc.

Answer 5

Looks like the sign in method has now been updated by google, I was implementing the Google Calendar for iOS app and I found the following code for Sign In:
func applicationDidFinishLaunching(_ application: UIApplication) {
// Initialize sign-in
var configureError: NSError?
GGLContext.sharedInstance().configureWithError(&configureError)
assert(configureError == nil, "Error configuring Google services: \(configureError!)")
}
in their document which gave the same error:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'You must specify |clientID| for |GIDSignIn|'
I took the lines which were inside:
func applicationDidFinishLaunching(_ application: UIApplication)
and put them in this method and sign in worked:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
Code for refernce:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
// Initialize sign-in
var configureError: NSError?
GGLContext.sharedInstance().configureWithError(&configureError)
assert(configureError == nil, "Error configuring Google services: \(configureError!)")
return true
}

Answer 6

You may need to obtain GoogleService-Info.plist from https://console.firebase.google.com rather than https://console.developers.google.com/.

Answer 7

Using Firebase remember also that you have to call Firebase.configure() function before you set the clientId. Otherwise, it won't work.