How to convert Google iOS Sign-In single page sample AppDelegate.h protocol -> to a segue to LoginPage ViewController AppDelegate.swift protocol? - ios

Question

Google's Sign-In sample on GitHub SignInSampleForPod.xcworkspace creates a single page sign-in using the AppDelegate.h SignInViewController.m etc protocol.
However many apps, such as mine, prefer to segue to a Login Page only when a user makes a choice requiring verification. I just want the basic Google Profile info and authentication token.
I have the Google iOS ClientID configured enough so a segue to my LoginPage.swift shows the Google Sign-In button via AppDelegate.swift:
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(
_ app: UIApplication,
open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]
) -> Bool {
var handled: Bool
handled = GIDSignIn.sharedInstance.handle(url)
if handled {
return true
}
// Handle other custom URL types.
// If not handled by this app, return false.
return false
}
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
GIDSignIn.sharedInstance.restorePreviousSignIn { user, error in
if error != nil || user == nil {
// Show the app's signed-out state.
} else {
// Show the app's signed-in state.
}
}
return true
}
And LoginPage.swift:
class LoginViewController: UIViewController {
let signInConfig = GIDConfiguration.init(clientID: "foo-bar85.apps.googleusercontent.com")
override func viewDidLoad() {
super.viewDidLoad()
GIDSignIn.sharedInstance.signIn(with: signInConfig, presenting: self) { user, error in
guard error == nil else { return }
guard let user = user else { return }
let emailAddress = user.profile?.email
let fullName = user.profile?.name
let givenName = user.profile?.givenName
let familyName = user.profile?.familyName
let profilePicUrl = user.profile?.imageURL(withDimension: 320)
}
So my question is what is the AppDelegate.swift Google Sign-In code for the fields shown below to display the basic profile info:
// Show the app's signed-out state.
} else {
// Show the app's signed-in state.

Answer 1

I may not able to understand your problem clearly.
But I am trying to answer based on my understanding.
You can create a class (GoogleLoginManager) for all google login related stuff and create a button in UI then call this method (signIn) from button action.
#IBAction func googleButtonAction(_ sender: Any) {
GoogleLoginManager.shared.signIn(controller: self) { (profile) in
print("GoogleLogin profile : \(String(describing: profile.name)), \(String(describing: profile.email))")
} onFailure: { (error) in
print("GoogleLogin error : \(String(describing: error.localizedDescription))")
}
}
import Foundation
import GoogleSignIn
class GoogleLoginManager: SocialLogin {
fileprivate var onSuccess : success?
fileprivate var onFailure : failure?
static let shared = GoogleLoginManager()
private override init() { }
func signIn(controller: UIViewController, onSuccess : #escaping success, onFailure : #escaping failure) {
self.onSuccess = onSuccess
self.onFailure = onFailure
GIDSignIn.sharedInstance().clientID = GOOGLE_CLIENT_ID
GIDSignIn.sharedInstance().delegate = self
GIDSignIn.sharedInstance().presentingViewController = controller
GIDSignIn.sharedInstance().signIn()
// Automatically sign in the user.
// GIDSignIn.sharedInstance()?.restorePreviousSignIn()
}
func signOut() {
GIDSignIn.sharedInstance().signOut()
}
}
extension GoogleLoginManager : GIDSignInDelegate {
func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!,
withError error: Error!) {
if let error = error {
if (error as NSError).code == GIDSignInErrorCode.hasNoAuthInKeychain.rawValue {
print("The user has not signed in before or they have since signed out.")
}
else if (error as NSError).code == GIDSignInErrorCode.canceled.rawValue {
print("user canceled the sign in request")
}
else {
print("\(error.localizedDescription)")
}
self.onFailure?(error)
return
}
var profile = SocialProfileModel.init(user: user)
profile.loginSuccess = true
self.onSuccess?(profile)
}
func sign(_ signIn: GIDSignIn!, didDisconnectWith user: GIDGoogleUser!,
withError error: Error!) {
// Perform any operations when the user disconnects from app here.
print("GIDSignIn : didDisconnectWith")
}
}

Answer 2

I just had to modify my above AppDelegate.swift slightly - adding a standard UIbutton linked to the following action - gets the profile info:
#IBAction func LogInButtonTouched(_ sender: UIButton) {
GIDSignIn.sharedInstance.signIn(with: signInConfig, presenting: self) { user, error in
guard error == nil else { return }
guard let user = user else { return }
let emailAddress = user.profile?.email
let fullName = user.profile?.name
let givenName = user.profile?.givenName
let familyName = user.profile?.familyName
let profilePicUrl = user.profile?.imageURL(withDimension: 320)
print("GoogleLogin profile : \(String(describing: user.profile?.name)), \(String(describing: user.profile?.email))")
}
}