Google SignIn not working for iOS 10

Question

I have integrated the GoogleSinIn API in my project with Swift 4.0. It is working on iOS 11.0 but when I'm testing the same on iOS 10.0 it is opening the Google login page on the Safari browser or the device and after signing successfully it is opening the Google search page.

1. When I click the GoogleSignIn button shown below it opens the browser shown in next image.

2. Then I fill up the credentials.

3. After the successful signed in, It redirects to the Google page instead of the application page.

Answer 1

You have to implement this delegate function in your AppDelegate.

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

Answer 2

check your GIDSignInUIDelegate, don't forget

func sign(_ signIn: GIDSignIn!, present viewController: UIViewController!) {
    self.present(viewController, animated: true, completion: nil)
}

func sign(_ signIn: GIDSignIn!, dismiss viewController: UIViewController!) {
    self.dismiss(animated: true, completion: nil)
}