Add event to calendar with EventKit Mountain Lion - eventkit

Question

I added the framework EventKit and I have this code. I can't add an event at default calendar.
#import "Calendar.h"
#import <EventKit/EventKit.h>
#implementation Calendar
-(IBAction)addCal:(id)sender
{
EKEventStore *store = [[EKEventStore alloc] initWithAccessToEntityTypes:EKEntityMaskEvent];
EKEvent *evento = [EKEvent eventWithEventStore:store];
[evento setStartDate:[NSDate date]];
[evento setTitle:#"Title"];
[evento setCalendar:[store defaultCalendarForNewEvents]];
NSError *error;
[store saveEvent:evento span:EKSpanThisEvent commit:YES error:&error];
}
In Console I have this:
"We are including and fetching events, because this application did something event-related. If this application doesn't care about events, then this is a potentially expensive call."
I'm a beginner.
Thanks for your help.

Answer 1

I successfully used this code:
//Calendar Test:
[self setEventStore:[[EKEventStore alloc] initWithAccessToEntityTypes:EKEntityMaskEvent]];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *dc = [[NSDateComponents alloc] init];
[dc setHour:1];
NSDate *startDate = [NSDate date];
NSDate *endDate = [calendar dateByAddingComponents:dc toDate:[NSDate date] options:0];
EKEvent *anEvent = [EKEvent eventWithEventStore:eventStore];
[anEvent setTitle:#"event1"];;
[anEvent setCalendar:[[eventStore calendarsForEntityType:EKCalendarTypeLocal]objectAtIndex:0]];
[anEvent setLocation:#"Somewhere"];
[anEvent setStartDate:startDate];
[anEvent setEndDate:endDate];
[eventStore saveEvent:anEvent span:EKSpanThisEvent commit:YES error:nil];
It gives me a one-hour event in my first calendar, but I still do get the message. I suspect the message is a one-off debugging message, but I did not test with a release version of the program. Couldn't find anything about this in the docs, either.
Hope that helps.