Google+ SDK for iOS Add Signin button programmatically

Question

Regarding G + docs here: https://developers.google.com/+/mobile/ios/sign-in

The login button can be added using XIB or programmatically in the UIViewController.

I have a TableViewController, and I'm going to add a G + Signin button as an auxiliary representation of a table row:

subtitleCell.accessoryView = self.googlePlusSignInButton; 

where the enter button will be initialized as follows:

 -(void) setGooglePlusButtons { self.googlePlusSignInButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; UIImage *backgroundButtonImage = [UIImage imageNamed:@"bt_search_cancel.png"]; googlePlusSignInButton_.frame = CGRectMake(0.0f, 0.0f, backgroundButtonImage.size.width, backgroundButtonImage.size.height); googlePlusSignInButton_.titleLabel.textColor = [UIColor whiteColor]; googlePlusSignInButton_.titleLabel.font = [UIFont boldSystemFontOfSize:11.0f]; googlePlusSignInButton_.titleLabel.numberOfLines = 2; googlePlusSignInButton_.titleLabel.shadowColor = [UIColor darkGrayColor]; googlePlusSignInButton_.titleLabel.shadowOffset = CGSizeMake(0.0f, -1.0f); [googlePlusSignInButton_ setTitle:NSLocalizedString(@"UI_BUTTONS_LOGIN", @"") forState:UIControlStateNormal]; [googlePlusSignInButton_ setBackgroundImage:backgroundButtonImage forState:UIControlStateNormal]; // Make sure the GPPSignInButton class is linked in because references from // xib file doesn't count. [GPPSignInButton class]; GPPSignIn *signIn = [GPPSignIn sharedInstance]; signIn.delegate = self; signIn.shouldFetchGoogleUserEmail = signIn.shouldFetchGoogleUserEmail; signIn.actions = [NSArray arrayWithObjects: @"http://schemas.google.com/ListenActivity", nil]; } 

The button is set to viewDidLoad:

 - (void)viewDidLoad { [super viewDidLoad]; [self setGooglePlusButtons]; //... 

UIViewControlled has an interface for the signin delegate:

 @interface MXMSettingsTableViewController () <GPPSignInDelegate> @end 

It seems that the delegate is not being called or the button with the common sign is not associated with the controller instance:

 // GPPSignInDelegate - (void)finishedWithAuth:(GTMOAuth2Authentication *)auth error:(NSError *)error { ///.... } 

I suppose that

 // Make sure the GPPSignInButton class is linked in because references from // xib file doesn't count. [GPPSignInButton class]; 

binds an instance button to a ViewController:

 // The button that handles Google+ sign-in. @property (retain, nonatomic) GPPSignInButton *googlePlusSignInButton; 

but something is wrong with this implementation, I can’t understand.

Answer 1

First of all, you must call the sign method in the action of your googlePlusSignInButton

Thus, the code should be:

 -(void) setGooglePlusButtons { self.googlePlusSignInButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; UIImage *backgroundButtonImage = [UIImage imageNamed:@"bt_search_cancel.png"]; googlePlusSignInButton_.frame = CGRectMake(0.0f, 0.0f, backgroundButtonImage.size.width, backgroundButtonImage.size.height); googlePlusSignInButton_.titleLabel.textColor = [UIColor whiteColor]; googlePlusSignInButton_.titleLabel.font = [UIFont boldSystemFontOfSize:11.0f]; googlePlusSignInButton_.titleLabel.numberOfLines = 2; googlePlusSignInButton_.titleLabel.shadowColor = [UIColor darkGrayColor]; googlePlusSignInButton_.titleLabel.shadowOffset = CGSizeMake(0.0f, -1.0f); [googlePlusSignInButton_ setTitle:NSLocalizedString(@"UI_BUTTONS_LOGIN", @"") forState:UIControlStateNormal]; [googlePlusSignInButton_ setBackgroundImage:backgroundButtonImage forState:UIControlStateNormal]; [googlePlusSignInButton addTarget:self action:@selector(signInGoogle:) forControlEvents:UIControlEventTouchUpInside]; } 

and the sign should be this way:

 - (void)signInGoogle { GPPSignIn *signIn = [GPPSignIn sharedInstance]; signIn.delegate = self; signIn.shouldFetchGoogleUserEmail = YES; signIn.clientID = kClientID; signIn.scopes = [NSArray arrayWithObjects:kGTLAuthScopePlusLogin,nil]; signIn.actions = [NSArray arrayWithObjects:@"http://schemas.google.com/ListenActivity",nil]; [signIn authenticate]; } 

Your code was missing a call to [signIn authenticate]; , plust, which you also need to pass in the clientID, which in the above snippet is a constant value (you need to declare this)

Answer 2

Despite several solutions, there was no way to make silentAuthentication work [/ p>

 - (void)initialize { // Read Google+ deep-link data. [GPPDeepLink setDelegate:self]; [GPPDeepLink readDeepLinkAfterInstall]; // Setup Google+ share dialog. [GPPShare sharedInstance].delegate = self; // Setup Google+ signin [GPPSignIn sharedInstance].clientID = APP_GOOGLEPLUS_APPID; [GPPSignIn sharedInstance].delegate = self; [GPPSignIn sharedInstance].shouldFetchGoogleUserEmail = YES; [GPPSignIn sharedInstance].shouldFetchGoogleUserID = YES; [GPPSignIn sharedInstance].actions = [NSArray arrayWithObjects:[self momentSchemaByType:MXMGooglePlusMomentListen], nil]; [GPPSignIn sharedInstance].scopes = [NSArray arrayWithObjects:kGTLAuthScopePlusLogin, nil]; // defined in GTLPlusConstants.h [[GPPSignIn sharedInstance] trySilentAuthentication]; shareAfterLogin= NO; trackIdToShare = nil; if([[MXMLogger sharedLogger] isDebug]) { NSLog(@"MXMGooglePlusManager initialize login %d keychain %d", [self isGooglePlusLoggedin], [GPPSignIn sharedInstance].hasAuthInKeychain); } } 

The strange thing is, keychain has authentication in

 2013-09-13 13:01:35.849 musiXmatch[1090:790b] MXMGooglePlusManager initialize login 0 keychain 1 

but the account is not registered.

Regarding the docs here

https://developers.google.com/+/mobile/ios/api/interface_g_p_p_sign_in

implementation must be correct.