Accessing Event Information GData API

MZimmerman6 · 05-19-2011, 10:36 AM

I am trying access event information from an already filled out google calendar so that I can display this information in a custom layout. I want to be able to access the title as well as information such as time and date of the event, and whatever else I may need.

I currently have the GData stuff in the application, but I am not able to get the data from the calendar. Can anyone lend a hand? Thanks in advance!

Bertrand21 · 05-19-2011, 04:03 PM

This should help:

Code:

#pragma mark -
#pragma mark Google Calendar API

- (GDataServiceGoogleCalendar *)calendarService {
	
	static GDataServiceGoogleCalendar* service = nil;
	
	if (!service) {
		service = [[GDataServiceGoogleCalendar alloc] init];
		
		[service setShouldCacheDatedData:YES];
		[service setServiceShouldFollowNextLinks:YES];
	}
	
	[service setUserCredentialsWithUsername:GOOGLE_ACCOUNT_USERNAME
								   password:GOOGLE_ACCOUNT_PASSWORD];
	
	return service;
}

#pragma mark -
#pragma mark Calendars

-(void)loadGoogleCalendarEvents{
	[self fetchAllCalendars];
}

- (void)fetchAllCalendars {
	
	GDataServiceGoogleCalendar *service = [self calendarService];
	GDataServiceTicket *ticket;
	
	ticket = [service fetchFeedWithURL:[NSURL URLWithString:kGDataGoogleCalendarDefaultOwnCalendarsFeed]
							  delegate:self
					 didFinishSelector:@selector(calendarListTicket:finishedWithFeed:error:)];
}

// fetch calendar metafeed callback
- (void)calendarListTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendar *)feed error:(NSError *)error {
	NSArray *calendars = [feed entries];
	if(calendars.count !=0){
		self.googleCalendar = [calendars objectAtIndex:0];
		[self fetchCalendarEvents];
	}
	else{
		NSLog(@"User has no calendars...");
	}
}

#pragma mark -
#pragma mark Events 

- (void)fetchCalendarEvents {
	if (self.googleCalendar) {
		// fetch the events feed
		NSURL *feedURL = [[self.googleCalendar alternateLink] URL];
		if (feedURL) {
			NSTimeInterval daysInTheFuture = GOOGLE_CALENDAR_DAY_AMOUNT * 86400;
			GDataDateTime *queryStartDate = [GDataDateTime dateTimeWithDate:[NSDate date] timeZone:[NSTimeZone defaultTimeZone]];
			GDataDateTime *queryEndDate = [GDataDateTime dateTimeWithDate:[[NSDate date] dateByAddingTimeInterval:daysInTheFuture] timeZone:[NSTimeZone defaultTimeZone]];
			
			GDataQueryCalendar *query = [GDataQueryCalendar calendarQueryWithFeedURL:feedURL];
			[query setMaxResults:100];
			[query setOrderBy:@"starttime"];
			[query setIsAscendingOrder:YES];
			[query setMinimumStartTime:queryStartDate];
			[query setMaximumStartTime:queryEndDate];
			
			GDataServiceGoogleCalendar *service = [self calendarService];
			GDataServiceTicket *ticket;
			ticket = [service fetchFeedWithQuery:query
										delegate:self
							   didFinishSelector:@selector(calendarEventsTicket:finishedWithFeed:error:)];
		}
	}
}

// event list fetch callback
- (void)calendarEventsTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendarEvent *)feed error:(NSError *)error {
	self.calendarEvents = [feed entries];
	[calendarEventTable reloadData];
}

MZimmerman6 · 05-20-2011, 10:13 AM

Quote:

Originally Posted by Bertrand21

This should help:

Code:

#pragma mark -
#pragma mark Google Calendar API

- (GDataServiceGoogleCalendar *)calendarService {
	
	static GDataServiceGoogleCalendar* service = nil;
	
	if (!service) {
		service = [[GDataServiceGoogleCalendar alloc] init];
		
		[service setShouldCacheDatedData:YES];
		[service setServiceShouldFollowNextLinks:YES];
	}
	
	[service setUserCredentialsWithUsername:GOOGLE_ACCOUNT_USERNAME
								   password:GOOGLE_ACCOUNT_PASSWORD];
	
	return service;
}

#pragma mark -
#pragma mark Calendars

-(void)loadGoogleCalendarEvents{
	[self fetchAllCalendars];
}

- (void)fetchAllCalendars {
	
	GDataServiceGoogleCalendar *service = [self calendarService];
	GDataServiceTicket *ticket;
	
	ticket = [service fetchFeedWithURL:[NSURL URLWithString:kGDataGoogleCalendarDefaultOwnCalendarsFeed]
							  delegate:self
					 didFinishSelector:@selector(calendarListTicket:finishedWithFeed:error:)];
}

// fetch calendar metafeed callback
- (void)calendarListTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendar *)feed error:(NSError *)error {
	NSArray *calendars = [feed entries];
	if(calendars.count !=0){
		self.googleCalendar = [calendars objectAtIndex:0];
		[self fetchCalendarEvents];
	}
	else{
		NSLog(@"User has no calendars...");
	}
}

#pragma mark -
#pragma mark Events 

- (void)fetchCalendarEvents {
	if (self.googleCalendar) {
		// fetch the events feed
		NSURL *feedURL = [[self.googleCalendar alternateLink] URL];
		if (feedURL) {
			NSTimeInterval daysInTheFuture = GOOGLE_CALENDAR_DAY_AMOUNT * 86400;
			GDataDateTime *queryStartDate = [GDataDateTime dateTimeWithDate:[NSDate date] timeZone:[NSTimeZone defaultTimeZone]];
			GDataDateTime *queryEndDate = [GDataDateTime dateTimeWithDate:[[NSDate date] dateByAddingTimeInterval:daysInTheFuture] timeZone:[NSTimeZone defaultTimeZone]];
			
			GDataQueryCalendar *query = [GDataQueryCalendar calendarQueryWithFeedURL:feedURL];
			[query setMaxResults:100];
			[query setOrderBy:@"starttime"];
			[query setIsAscendingOrder:YES];
			[query setMinimumStartTime:queryStartDate];
			[query setMaximumStartTime:queryEndDate];
			
			GDataServiceGoogleCalendar *service = [self calendarService];
			GDataServiceTicket *ticket;
			ticket = [service fetchFeedWithQuery:query
										delegate:self
							   didFinishSelector:@selector(calendarEventsTicket:finishedWithFeed:error:)];
		}
	}
}

// event list fetch callback
- (void)calendarEventsTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendarEvent *)feed error:(NSError *)error {
	self.calendarEvents = [feed entries];
	[calendarEventTable reloadData];
}

I will give this a try, hopefully I can get it to work, thanks so much for your help in advance if it does work

Bertrand21 · 05-20-2011, 10:41 AM

Quote:

Originally Posted by MZimmerman6

I will give this a try, hopefully I can get it to work, thanks so much for your help in advance if it does work

It does work. I've used it in my project.

MZimmerman6 · 05-20-2011, 11:04 AM

Quote:

Originally Posted by Bertrand21

It does work. I've used it in my project.

I completely trusted you, but I meant work for my purposes. Thanks a lot for your help I got it working.

However, will this method work as well for linked calendars from other people. An example being if a person added a calendar from another user to their own calendar. How would I go about accessing that?

MZimmerman6 · 05-20-2011, 11:09 AM

Quote:

Originally Posted by MZimmerman6

I completely trusted you, but I meant work for my purposes. Thanks a lot for your help I got it working.

However, will this method work as well for linked calendars from other people. An example being if a person added a calendar from another user to their own calendar. How would I go about accessing that?

Nevermind, in order to do this you would edit the URLWithString argument in fetch all calendars to kGDataGoogleCalendarDefaultAllCalendarsFeed, and then later you can change the array index, in calendarListTicket, to access a specific calendar, as long as the calendar remains in the same place.

mhk_mubashir · 08-12-2011, 02:46 AM

Quote:

Originally Posted by Bertrand21

This should help:

Code:

#pragma mark -
#pragma mark Google Calendar API

- (GDataServiceGoogleCalendar *)calendarService {
	
	static GDataServiceGoogleCalendar* service = nil;
	
	if (!service) {
		service = [[GDataServiceGoogleCalendar alloc] init];
		
		[service setShouldCacheDatedData:YES];
		[service setServiceShouldFollowNextLinks:YES];
	}
	
	[service setUserCredentialsWithUsername:GOOGLE_ACCOUNT_USERNAME
								   password:GOOGLE_ACCOUNT_PASSWORD];
	
	return service;
}

#pragma mark -
#pragma mark Calendars

-(void)loadGoogleCalendarEvents{
	[self fetchAllCalendars];
}

- (void)fetchAllCalendars {
	
	GDataServiceGoogleCalendar *service = [self calendarService];
	GDataServiceTicket *ticket;
	
	ticket = [service fetchFeedWithURL:[NSURL URLWithString:kGDataGoogleCalendarDefaultOwnCalendarsFeed]
							  delegate:self
					 didFinishSelector:@selector(calendarListTicket:finishedWithFeed:error:)];
}

// fetch calendar metafeed callback
- (void)calendarListTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendar *)feed error:(NSError *)error {
	NSArray *calendars = [feed entries];
	if(calendars.count !=0){
		self.googleCalendar = [calendars objectAtIndex:0];
		[self fetchCalendarEvents];
	}
	else{
		NSLog(@"User has no calendars...");
	}
}

#pragma mark -
#pragma mark Events 

- (void)fetchCalendarEvents {
	if (self.googleCalendar) {
		// fetch the events feed
		NSURL *feedURL = [[self.googleCalendar alternateLink] URL];
		if (feedURL) {
			NSTimeInterval daysInTheFuture = GOOGLE_CALENDAR_DAY_AMOUNT * 86400;
			GDataDateTime *queryStartDate = [GDataDateTime dateTimeWithDate:[NSDate date] timeZone:[NSTimeZone defaultTimeZone]];
			GDataDateTime *queryEndDate = [GDataDateTime dateTimeWithDate:[[NSDate date] dateByAddingTimeInterval:daysInTheFuture] timeZone:[NSTimeZone defaultTimeZone]];
			
			GDataQueryCalendar *query = [GDataQueryCalendar calendarQueryWithFeedURL:feedURL];
			[query setMaxResults:100];
			[query setOrderBy:@"starttime"];
			[query setIsAscendingOrder:YES];
			[query setMinimumStartTime:queryStartDate];
			[query setMaximumStartTime:queryEndDate];
			
			GDataServiceGoogleCalendar *service = [self calendarService];
			GDataServiceTicket *ticket;
			ticket = [service fetchFeedWithQuery:query
										delegate:self
							   didFinishSelector:@selector(calendarEventsTicket:finishedWithFeed:error:)];
		}
	}
}

// event list fetch callback
- (void)calendarEventsTicket:(GDataServiceTicket *)ticket finishedWithFeed:(GDataFeedCalendarEvent *)feed error:(NSError *)error {
	self.calendarEvents = [feed entries];
	[calendarEventTable reloadData];
}

Hi Bertrand21 i needed a little help to im using GData api 1.7.0 with GettingStarted - iphone-gcal - Setting up the XCode project for your development environment - An Objective-C project that uses Google Data APIs to access Google Calendar contents on your iPhone - Google Project Hosting this Google Calendar project in xcode 4.2 i have resolved all the errors and warnings but the issue is that when the application launches the Google calendar is stuck at the "Please wait" screen i did a lot of postings on the others forums but still no response i hope that any one can help there