Google + iPhone API sign in and share without leaving app

Question

I recently integrated the Google + API in my App, it was a breeze, my only problem with it, is that everything requires you to leave the app and then come back (it uses URL

Answer 1

I hope it will help somebody. It merges Google+ and Gmail samples and completely avoids using Google SignIn Button, i.e you do not leave the app.

Add both Google+ and Gmail API to you Google project, in your app login to google as you would to gmail using GTMOAuth2ViewControllerTouch.xib from OAuth2 and set scope to Google+:

-(IBAction)dologin{
    NSString *scope = kGTLAuthScopePlusLogin;//Google+ scope
    GTMOAuth2Authentication * auth = [GTMOAuth2ViewControllerTouch 
    authForGoogleFromKeychainForName:kKeychainItemName
    clientID:kClientID
    clientSecret:kClientSecret];
    if ([auth refreshToken] == nil) {
    GTMOAuth2ViewControllerTouch *authController;
    authController = [[GTMOAuth2ViewControllerTouch alloc] 
    initWithScope:scope 
    clientID:kClientID 
    clientSecret:kClientSecret  
    keychainItemName:kKeychainItemName
    delegate:self
    finishedSelector:@selector(viewController:finishedWithAuth:error:)];
    [[self navigationController] pushViewController:authController animated:YES];
    }else{
    [auth beginTokenFetchWithDelegate:self didFinishSelector:@selector(auth:finishedRefreshWithFetcher:error:)];
    }
}

and RETAIN the authentication object if signed in successfully, then use that auth object when using google plus services:

GTLServicePlus* plusService = [[[GTLServicePlus alloc] init] autorelease];
[plusService setAuthorizer:self.auth];//!!!here use our authentication object!!!

No need for GPPSignIn.

Full write up is here: Here is Another Solution