How can i implement GTMOAuth in iOS - iphone

Question

i need to implement GTMOAuth to my iOS app..for this i have downloaded the OAuth Library and write some code
- (GTMOAuthAuthentication *)myCustomAuth {
NSString *myConsumerKey = #"f964039f2d7bc82054"; // pre-registered with service
NSString *myConsumerSecret = #"c9a749c0f1e30c9246a3be7b2586434f"; // pre-assigned by service
GTMOAuthAuthentication *auth;
auth = [[[GTMOAuthAuthentication alloc] initWithSignatureMethod:kGTMOAuthSignatureMethodHMAC_SHA1
consumerKey:myConsumerKey
privateKey:myConsumerSecret] autorelease];
// setting the service name lets us inspect the auth object later to know
// what service it is for
auth.serviceProvider = #"Custom Auth Service";
return auth;
}
- (void)signInToCustomService {
NSURL *requestURL = [NSURL URLWithString:#"http://alpha.easyreceipts.com/api/v1/oauth/request_token"];
NSURL *accessURL = [NSURL URLWithString:#"http://alpha.easyreceipts.com/api/v1/oauth/access_token"];
NSURL *authorizeURL = [NSURL URLWithString:#"http://alpha.easyreceipts.com/api/v1/oauth/authorize"];
NSString *scope = #"http://alpha.easyreceipts.com/api/v1/";
GTMOAuthAuthentication *auth = [self myCustomAuth];
// set the callback URL to which the site should redirect, and for which
// the OAuth controller should look to determine when sign-in has
// finished or been canceled
//
// This URL does not need to be for an actual web page
[auth setCallback:#"http://alpha.easyreceipts.com/api/v1/"];
// Display the autentication view
GTMOAuthViewControllerTouch *viewController;
viewController = [[[GTMOAuthViewControllerTouch alloc] initWithScope:scope
language:nil
requestTokenURL:requestURL
authorizeTokenURL:authorizeURL
accessTokenURL:accessURL
authentication:auth
appServiceName:#"My App: Custom Service"
delegate:self
finishedSelector:#selector(viewController:finishedWithAuth:error:)] autorelease];
viewController = [self.storyboard instantiateViewControllerWithIdentifier:#"myID"];
[[self navigationController] pushViewController:viewController
animated:YES];
}
but further i don't know how to implement it.Please help me Thanks in advance

Answer 1

First, if you want to implement an OAuth authentication system with the GTM library, you should get this one.
You can find the complete sources of GTMOAuth here.
Secondly, you can find an example of how to use it in the git repository too. You should find everything you need to at least authenticate.
If you have any more problem, please provide more informations.