如果要创建活动，请使用：

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];
}

您的视图控制器应符合 EKEventEditViewDelegate 协议：

@interface ViewController () <EKEventEditViewDelegate>

并实施 didCompleteWithAction 方法：

- (void)eventEditViewController:(EKEventEditViewController *)controller didCompleteWithAction:(EKEventEditViewAction)action
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

显然，您可以按照自己的方式创建活动。例如，这是在下周查找具有相应标题的事件，如果找不到，则创建一个新事件（在四小时内开始的一小时事件）：

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;
}