See the Calendar and Reminders Programming Guide. But the basic process is:
Add the
EventKit.Framework
andEventKitUI.Framework
to your project. (See Linking to a Library or Framework.)Import the header:
#import <EventKitUI/EventKitUI.h>
If creating an event, you use :
- (IBAction)didPressCreateEventButton:(id)sender { EKEventStore *store = [[EKEventStore alloc] init]; if([store respondsToSelector:@selector(requestAccessToEntityType:completion:)]) { // iOS 6 [store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) { if (granted) { dispatch_async(dispatch_get_main_queue(), ^{ [self createEventAndPresentViewController:store]; }); } }]; } else { // iOS 5 [self createEventAndPresentViewController:store]; } } - (void)createEventAndPresentViewController:(EKEventStore *)store { EKEvent *event = [self findOrCreateEvent:store]; EKEventEditViewController *controller = [[EKEventEditViewController alloc] init]; controller.event = event; controller.eventStore = store; controller.editViewDelegate = self; [self presentViewController:controller animated:YES completion:nil]; }
Your view controller should conform to the
EKEventEditViewDelegate
protocol:@interface ViewController () <EKEventEditViewDelegate>
and implement the
didCompleteWithAction
method:- (void)eventEditViewController:(EKEventEditViewController *)controller didCompleteWithAction:(EKEventEditViewAction)action { [self dismissViewControllerAnimated:YES completion:nil]; }
You can obviously create your event any way you want. For example, this is looks for an event in the next week with the appropriate title, and if it doesn't find it, create a new event (hour long event that starts in four hours):
- (EKEvent *)findOrCreateEvent:(EKEventStore *)store { NSString *title = @"My event title"; // try to find an event EKEvent *event = [self findEventWithTitle:title inEventStore:store]; // if found, use it if (event) return event; // if not, let's create new event event = [EKEvent eventWithEventStore:store]; event.title = title; event.notes = @"My event notes"; event.location = @"My event location"; event.calendar = [store defaultCalendarForNewEvents]; NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *components = [[NSDateComponents alloc] init]; components.hour = 4; event.startDate = [calendar dateByAddingComponents:components toDate:[NSDate date] options:0]; components.hour = 1; event.endDate = [calendar dateByAddingComponents:components toDate:event.startDate options:0]; return event; } - (EKEvent *)findEventWithTitle:(NSString *)title inEventStore:(EKEventStore *)store { // Get the appropriate calendar NSCalendar *calendar = [NSCalendar currentCalendar]; // Create the start range date components NSDateComponents *oneDayAgoComponents = [[NSDateComponents alloc] init]; oneDayAgoComponents.day = -1; NSDate *oneDayAgo = [calendar dateByAddingComponents:oneDayAgoComponents toDate:[NSDate date] options:0]; // Create the end range date components NSDateComponents *oneWeekFromNowComponents = [[NSDateComponents alloc] init]; oneWeekFromNowComponents.day = 7; NSDate *oneWeekFromNow = [calendar dateByAddingComponents:oneWeekFromNowComponents toDate:[NSDate date] options:0]; // Create the predicate from the event store's instance method NSPredicate *predicate = [store predicateForEventsWithStartDate:oneDayAgo endDate:oneWeekFromNow calendars:nil]; // Fetch all events that match the predicate NSArray *events = [store eventsMatchingPredicate:predicate]; for (EKEvent *event in events) { if ([title isEqualToString:event.title]) { return event; } } return nil; }