Downloading calendar data in Objective-C - ios

Question

I am trying to download google calendar data.
I am following a tutorial this link according to which implementing some of the GoogleOAuth delegate methods will let me get my desired data.
First I converted the response JSON data into an NSDictionary object and after that, I, NSLog this dictionary, to see the way the returned data is formed which is as shown below.
calendarInfoDict is {
etag = "\"1436255371893000\"";
items = (
{
accessRole = owner;
backgroundColor = "#9a9cff";
colorId = 17;
defaultReminders = (
{
method = popup;
minutes = 30;
}
);
etag = "\"1436255371893000\"";
foregroundColor = "#000000";
id = "sabiranthapa#gmail.com";
kind = "calendar#calendarListEntry";
notificationSettings = {
notifications = (
{
method = email;
type = eventCreation;
},
{
method = email;
type = eventChange;
},
{
method = email;
type = eventCancellation;
},
{
method = email;
type = eventResponse;
}
);
};
primary = 1;
selected = 1;
summary = "sabiranthapa#gmail.com";
timeZone = "Asia/Calcutta";
},
{
accessRole = reader;
backgroundColor = "#92e1c0";
colorId = 13;
defaultReminders = (
);
description = "Displays birthdays of people in Google Contacts and optionally \"Your Circles\" from Google+. Also displays anniversary and other event dates from Google Contacts, if applicable.";
etag = "\"1436255358367000\"";
foregroundColor = "#000000";
id = "#contacts#group.v.calendar.google.com";
kind = "calendar#calendarListEntry";
summary = Birthdays;
timeZone = "Asia/Calcutta";
}
);
kind = "calendar#calendarList";
nextSyncToken = 00001436255371893000;
}
According to tutorial there is a block containing a bunch of information regarding every calendar I have created in Google Calendars inside curly bracket. But I am not getting any events that I have saved which can be seen in Google Calendar after signing in gmail but not in my apps where I need to work with it.
My code is
-(void)responseFromServiceWasReceived:(NSString *)responseJSONAsString andResponseJSONAsData:(NSData *)responseJSONAsData{
NSError *error;
if ([responseJSONAsString rangeOfString:#"calendarList"].location != NSNotFound) {
NSDictionary *calendarInfoDict = [NSJSONSerialization JSONObjectWithData:responseJSONAsData options:NSJSONReadingMutableContainers error:&error];
NSLog(#"calendarInfoDict is %#", calendarInfoDict);
if (error) {
NSLog(#"%#", [error localizedDescription]);
}
else{
NSArray *calendarsInfo = [calendarInfoDict objectForKey:#"items"];
if (_arrGoogleCalendars == nil) {
_arrGoogleCalendars = [[NSMutableArray alloc] init];
}
for (int i=0; i<[calendarsInfo count]; i++) {
NSDictionary *currentCalDict = [calendarsInfo objectAtIndex:i];
NSArray *values = [NSArray arrayWithObjects:[currentCalDict objectForKey:#"id"],
[currentCalDict objectForKey:#"summary"],
nil]; NSArray *keys = [NSArray arrayWithObjects:#"id", #"summary", nil];
[_arrGoogleCalendars addObject:
[[NSMutableDictionary alloc] initWithObjects:values forKeys:keys]];
}
_dictCurrentCalendar = [[NSDictionary alloc] initWithDictionary:[_arrGoogleCalendars objectAtIndex:0]];
[_barItemPost setEnabled:YES];
[_barItemRevokeAccess setEnabled:YES];
[self showOrHideActivityIndicatorView];
But I always end up with condition
if (_arrGoogleCalendars == nil) {
_arrGoogleCalendars = [[NSMutableArray alloc] init];
}
without able to access my events.
How can I download (or access) my Events from google calendar?