google signin not calling delegate method after success

Question

i am using google sdk for google signin but after entering the email and password

in viewDidLoad i have added delegate

//set Google sign In delegates

Answer 1

Add following code in your AppDelegate.m file

-(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation{



    return [[GIDSignIn sharedInstance] handleURL:url
                               sourceApplication:sourceApplication
                                      annotation:annotation];
    }

Answer 2

The method that get's called is called on GIDSignInUiDelegate, while the method that is not called is called on the GIDSignInDelegate after login. Here's what the GIDSignIn header file says:

@protocol GIDSignInDelegate <NSObject>        
- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error;

@protocol GIDSignInUIDelegate <NSObject>
@optional
- (void)signInWillDispatch:(GIDSignIn *)signIn error:(NSError *)error;

Since you have set both the uiDelegate and the delegate to your UIViewController instance, both methods should get called.

When I encountered the same problem, my mistake was, that I also set the AppDelegate to be the GIDSignInDelegate causing confusion for hours! So my advice: double check if your ViewController still is the delegate of GIDSignIn.sharedInstance when returning from sign in. E.g. set a breakpoint in the callback that get's called:

- (void)signInWillDispatch:(GIDSignIn *)signIn error:(NSError *)error {
    if (GIDSignIn.delegate != self) {NSLog("gotcha!")}
}

Answer 3

I was having a very similar issue, until realizing that the GIDSignInDelegate was being garbage collected between starting the signin and getting the callback. Just storing a reference to it elsewhere resolved my issues. (presumably Google uses a weak reference)

Answer 4

AFAIK GIDSignIn class has two delegate properties:

• delegate
• uiDelegate

The method that is not being called for you is defined in uiDeleagte's protocol.

Answer 5

I had the same problem. I had tried sign in like below.

// GDrive.swift

import GoogleSignIn
import GoogleAPIClientForREST

class GDrive: NSObject,GIDSignInDelegate,GIDSignInUIDelegate

func signIn() {
        GIDSignIn.sharedInstance().uiDelegate = self
        GIDSignIn.sharedInstance().delegate = self
        GIDSignIn.sharedInstance().scopes = scopes
        GIDSignIn.sharedInstance().signIn()
    }

func sign(inWillDispatch signIn: GIDSignIn!, error: Error!) {
        print("Dispatch ")
    }

    func sign(_ signIn: GIDSignIn!, present viewController: UIViewController!)
    {
        print("Present View Controller")
    }

    func sign(_ signIn: GIDSignIn!, dismiss viewController: UIViewController!)
    {
        print("Dismiss View Controller")
    }

    public func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!)
    {
        print("Sign In")
    }
}


//ViewController.swift

class MainVC: UIViewController {

    func signInGDrive() {
          let gClient:GDrive = GDrive() // this line has weak reference
          gClient.signIn()

    }

}

After moving gClient variable on top of the file delegate functions has been called. Final working code :

//ViewController.swift

class MainVC: UIViewController {
    let gClient:GDrive = GDrive() 
    func signInGDrive() {

          gClient.signIn()

    }

}

Thanks @akroy.