Using the Google APIs with OAuth 2.0 for gmail login in iPhone
I have found a services from Google which provides to access to Google APIs for various Google Services. I could set up a project in iPhone and create API access for iOS applications (via OAuth2.0 ) and native applications. I wanted to use the native API for my iPhone app. It API gives me email,fullname,firstname,lastname,google_id,gender,dob,profile_image. How do I use these in my iPhone Application, Any sample apps, snippets available?
Please help me.
Here is my code :
-(void) loadGmail_Login
{
NSString *keychainItemName = nil;
if ([self shouldSaveInKeychain]) {
keychainItemName = kKeychainItemName;
}
// For GTM applications, the scope is available as
NSString *scope = @"http://www.google.com/m8/feeds/";
// ### Important ###
// GTMOAuthViewControllerTouch is not designed to be reused. Make a new
// one each time you are going to show it.
// Display the autentication view.
GTMOAuthAuthentication *auth;
auth = [GTMOAuthViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName];
GTMOAuthViewControllerTouch *viewController = [[[GTMOAuthViewControllerTouch alloc]
initWithScope:scope
language:nil
appServiceName:keychainItemName
delegate:self
finishedSelector:@selector(viewController:finishedWithAuth:error:)] autorelease];
// You can set the title of the navigationItem of the controller here, if you want.
// Optional: display some html briefly before the sign-in page loads
NSString *html = @"<html><body bgcolor=silver><div align=center>Loading sign-in page...</div></body></html>";
[viewController setInitialHTMLString:html];
[[self navigationController] pushViewController:viewController animated:YES];
}
- (void)viewController:(GTMOAuthViewControllerTouch *)viewController
finishedWithAuth:(GTMOAuthAuthentication *)auth
error:(NSError *)error
{
if (error != nil)
{
// Authentication failed (perhaps the user denied access, or closed the
// window before granting access)
NSLog(@"Authentication error: %@", error);
NSData *responseData = [[error userInfo] objectForKey:@"data"]; // kGTMHTTPFetcherStatusDataKey
if ([responseData length] > 0) {
// show the body of the server's authentication failure response
NSString *str = [[[NSString alloc] initWithData:responseData
encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"%@", str);
}
[self setAuthentication:nil];
}
else
{
// save the authentication object
[self setAuthentication:auth];
// Just to prove we're signed in, we'll attempt an authenticated fetch for the
// signed-in user
[self doAnAuthenticatedAPIFetch];
}
}
- (void)doAnAuthenticatedAPIFetch
{
NSString *urlStr;
// Google Contacts feed
//
// https://www.googleapis.com/oauth2/v2/userinfo
urlStr = @"http://www.google.com/m8/feeds/contacts/default/thin";
NSURL *url = [NSURL URLWithString:urlStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[mAuth authorizeRequest:request];
NSError *error = nil;
NSURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request
returningResponse:&response
error:&error];
if (data) {
// API fetch succeeded
NSString *str = [[[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"API response: %@", str);
GGCXml_Adaptor *localAlphabetXMLParser = [[GGCXml_Adaptor alloc] init];
[localAlphabetXMLParser processBooksXML:data];
[localAlphabetXMLParser release];
// [self updateUI];
} else {
// fetch failed
NSLog(@"API fetch error: %@", error);
}
}
- (void)setAuthentication:(GTMOAuthAuthentication *)auth {
[mAuth autorelease];
mAuth = [auth retain];
}
First you will need to get token from Google API, For this 1st step you will have to follow this tutorial and in the end of this link there is whole source code for iOS for getting token from google API
http://technogerms.com/login-with-google-using-oauth-2-0-for-ios-xcode-objective-c/
Then in the next step you have to send that token to Google API to request user Data, I just needed the first step So I am sharing my searchings
Try this Tutorial and Source code Link
.. It's works fine for me.1. Tutorial Reference: http://technogerms.com/login-with-google-using-oauth-2-0-for-ios-xcode-objective-c/
2. Api Reference : https://code.google.com/apis/console/
3. Source code: https://github.com/emysa341/Login-with-gmail-google-g--using-oath-2.0-protocol/archive/master.zip
i think this will help anybody else Follow the below steps to integrate gmail with your application .
1.Add following classes to you project .
GTMHTTPFetcher.h , GTMHTTPFetcher.m ,GTMOAuth2Authentication.h, GTMOAuth2Authentication.m,GTMOAuth2SignIn.h,GTMOAuth2SignIn.m,GTMOAuth2ViewControllerTouch.h,GTMOAuth2ViewControllerTouch.m,GTMOAuth2ViewTouch.xib,SBJSON.h , SBJSON.m
you will get these classes here : https://github.com/jonmountjoy/Force.com-iOS-oAuth-2.0-Example
Note : if you are working under ARC Environment then you have to disable the ARC for following files :
GTMHTTPFetcher.m , GTMOAuth2Authentication.m , GTMOAuth2SignIn.m, GTMOAuth2ViewControllerTouch.m
To disable ARC for source files in Xcode 4, select the project and the target in Xcode. Under the target "Build Phases" tab, expand the Compile Sources build phase, select the library source files, then press Enter to open an edit field, and type -fno-objc-arc as the compiler flag for those files.
2. add the following frameworks
security.framework , systemConfiguration.framework
3. Register your app to google api console …. here : https://code.google.com/apis/console
Then go to ApiAccess section , create client id for iOS app . then you will get clientID, ClientSecret and RedirectUrl
**4. Now it's time for coding . . . .**
create a signIn button in your controller and set the action for that . Here when the user click the button SignInGoogleButtonClicked method gets called .
//import GTMOAuth2Authentication , GTMOAuth2ViewControllerTouch
#define GoogleClientID @"paster your client id"
#define GoogleClientSecret @"paste your client secret"
#define GoogleAuthURL @"https://accounts.google.com/o/oauth2/auth"
#define GoogleTokenURL @"https://accounts.google.com/o/oauth2/token"
-(void) SignInGoogleButtonClicked
{
NSURL * tokenURL = [NSURL URLWithString:GoogleTokenURL];
NSString * redirectURI = @"urn:ietf:wg:oauth:2.0:oob";
GTMOAuth2Authentication * auth;
auth = [GTMOAuth2Authentication authenticationWithServiceProvider:@"google"
tokenURL:tokenURL
redirectURI:redirectURI
clientID:GoogleClientID
clientSecret:GoogleClientSecret];
auth.scope = @"https://www.googleapis.com/auth/plus.me";
GTMOAuth2ViewControllerTouch * viewcontroller = [[GTMOAuth2ViewControllerTouch alloc] initWithAuthentication:auth
authorizationURL:[NSURL URLWithString:GoogleAuthURL]
keychainItemName:@"GoogleKeychainName" delegate:self
finishedSelector:@selector(viewController:finishedWithAuth:error:)];
[self.navigationController pushViewController:viewcontroller animated:YES];
}
//this method is called when authentication finished
- (void)viewController:(GTMOAuth2ViewControllerTouch * )viewController finishedWithAuth:(GTMOAuth2Authentication * )auth error:(NSError * )error
{
if (error != nil) {
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Error Authorizing with Google"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
else
{
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert !"
message:@"success"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}
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