Custom Google Sign In throw exception on GIDSignInDelegate protocol

Question

I'm writing an iOS app in obj-c and using Google SignIn SDK to do the Google SignIn flow. I wanna be able to customize the button and action a little it so I went ahead implementing the protocols of

GIDSignInDelegate

myself based on their documentation. But it throws and exception for no reason.

Here's the minimal code of my view controller.

viewcontroller.m

    #import "ViewController.h"

    #import <FBSDKLoginKit/FBSDKLoginKit.h>



    @interface ViewController ()





    @property (weak, nonatomic) IBOutlet UIButton *GoogleSignIn;



    @end



    @implementation ViewController



    - (void)viewDidLoad {

        [super viewDidLoad];

        // Do any additional setup after loading the view, typically from a nib.

    }



    - (void)didReceiveMemoryWarning {

        [super didReceiveMemoryWarning];

        // Dispose of any resources that can be recreated.

    }





    - (IBAction)googleButtonTouchUpInside:(id)sender {

        [[GIDSignIn sharedInstance] signIn];

    }



    // Implement these methods only if the GIDSignInUIDelegate is not a subclass of

    // UIViewController.



    // Stop the UIActivityIndicatorView animation that was started when the user

    // pressed the Sign In button

    - (void)signInWillDispatch:(GIDSignIn *)signIn error:(NSError *)error {

        //[UIActivityIndicatorView stopAnimating];

    }



    // Present a view that prompts the user to sign in with Google

    - (void)signIn:(GIDSignIn *)signIn

    presentViewController:(UIViewController *)viewController {

        [self presentViewController:viewController animated:YES completion:nil];

    }



    // Dismiss the "Sign in with Google" view

    - (void)signIn:(GIDSignIn *)signIn

    dismissViewController:(UIViewController *)viewController {

        [self dismissViewControllerAnimated:YES completion:nil];

}



@end

viewcontroller.h

#import <UIKit/UIKit.h>

#import <Google/SignIn.h>



@interface ViewController : UIViewController <GIDSignInUIDelegate>



@end

I do have whatever delegate method is required for a custom login flow google doc
Did I miss anything?

Answer 1

This is basic workaroung for google signIn ... so check what is missing for you

First of all in your button action use

GIDSignIn *signin = [GIDSignIn sharedInstance];
signin.shouldFetchBasicProfile = true;
signin.delegate = self;
signin.uiDelegate = self;
[signin signIn];

Then for Delegates

- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error {
    // Perform any operations on signed in user here.
    if (error == nil) {
        NSString *userId = user.userID;                  
    } else {
        NSLog(@"%@", error.localizedDescription);
    }
}

- (void)signIn:(GIDSignIn *)signIn didDisconnectWithUser:(GIDGoogleUser *)user withError:(NSError *)error {
    // Perform any operations when the user disconnects from app here.
}

- (void)signInWillDispatch:(GIDSignIn *)signIn error:(NSError *)error {
    NSLog(@"%@",error.description);
}

// Present a view that prompts the user to sign in with Google
- (void)signIn:(GIDSignIn *)signIn presentViewController:(UIViewController *)viewController {
    //present view controller
}

// Dismiss the "Sign in with Google" view
- (void)signIn:(GIDSignIn *)signIn dismissViewController:(UIViewController *)viewController {
      //dismiss view controller
 }

Custom Google Sign In throw exception on GIDSignInDelegate protocol

Sign up