How to sign out with Google+ on iPhone - ios

Question

I am writing an application where user can login using Google+. I followed GOOGLE Developer console and successfully logged in and obtained the user profile information through Access_Token. and i want to login through web view, but how to make sign out after login?
My Webview method
-(void)addWebView
{
NSString *url = [NSString stringWithFormat:#"https://accounts.google.com/o/oauth2/auth?response_type=code&client_id=%#&redirect_uri=%#&scope=%#&data-requestvisibleactions=%#",client_id,callbakc,scope,visibleactions];
self.webview = [[UIWebView alloc]init];
self.webview.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
self.webview.delegate = self;
[self.view addSubview:self.webview];
[self.webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];
}
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
// [indicator startAnimating];
if ([[[request URL] host] isEqualToString:#"localhost"]) {
// Extract oauth_verifier from URL query
NSString* verifier = nil;
NSArray* urlParams = [[[request URL] query] componentsSeparatedByString:#"&"];
for (NSString* param in urlParams) {
NSArray* keyValue = [param componentsSeparatedByString:#"="];
NSString* key = [keyValue objectAtIndex:0];
if ([key isEqualToString:#"code"]) {
verifier = [keyValue objectAtIndex:1];
NSLog(#"verifier %#",verifier);
break;
}
}
if (verifier) {
NSString *data = [NSString stringWithFormat:#"code=%#&client_id=%#&client_secret=%#&redirect_uri=%#&grant_type=authorization_code", verifier,client_id,secret,callbakc];
NSString *url = [NSString stringWithFormat:#"https://accounts.google.com/o/oauth2/token"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[data dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
receivedData = [[NSMutableData alloc] init];
} else {
// ERROR!
}
[webView removeFromSuperview];
return NO;
}
return YES;
}

Answer 1

You no longer need to do this yourself. As of 2.0.0, Google Sign-in with the Identity SDK will allow you to use a webview.
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSError* configureError;
[[GGLContext sharedInstance] configureWithError: &configureError];
NSAssert(!configureError, #"Error configuring Google services: %#", configureError);
[GIDSignIn sharedInstance].allowsSignInWithWebView = YES;
[GIDSignIn sharedInstance].allowsSignInWithBrowser = NO;
[GIDSignIn sharedInstance].delegate = self;
// ...
}
After signing the user in, you'll receive all of the relevant details in didSignInForUser:
- (void)signIn :(GIDSignIn *)signIn
didSignInForUser:(GIDGoogleUser *)user
withError:(NSError *)error {
// Perform any operations on signed in user here.
NSString *userId = user.userID; // For client-side use only!
NSString *idToken = user.authentication.idToken; // Safe to send to the server
NSString *name = user.profile.name;
NSString *email = user.profile.email;
}
Later, when you want to sign the user out, just call the SignOut method on the sharedInstance singleton:
[GIDSignIn sharedInstance].signOut();
You should try out the Google Sign-in example to see a full example of how to use the SDK:
pod try Google