Login using facebook account

loginFacebook

- (IBAction)loginButtonPressed:(id)sender {

	NSString *client_id = @"142759389130183";
	
	//alloc and initalize our FbGraph instance
	self.fbGraph = [[FbGraph alloc] initWithFbClientID:client_id];
	
	//begin the authentication process.....
	[fbGraph authenticateUserWithCallbackObject:self andSelector:@selector(fbGraphCallback:) 
						 andExtendedPermissions:@"read_stream,user_photos,user_videos,publish_stream,offline_access,user_checkins,friends_checkins"];