Add and remove iCal events with your iOS app.md

Add and remove iCal events with your iOS app

In order for this to work, you need to import Evenkit at the top of your file. 
Then you can add the function setiCalEvent to your file and then you can simply use <code> [self setiCalEvent:true]; </code> or <code>        [self setiCalEvent:false]; </code>. You don't need yo save any data inside your app to remove them later on, because the app does a search query. 

setiCalEvent.m

- (void)setiCalEvent:(BOOL)setEvent{

    
    //this will only happen if iCal is enabled
    if([[NSUserDefaults standardUserDefaults] boolForKey:@"settingiCal"]) {
                
        // Set the Date and Time for the Event
        NSDate *eventDateAndTime = _event.dateTimeGMT;
        
        // Set iCal Event
        EKEventStore *eventStore = [[EKEventStore alloc] init];
        
        EKEvent *event = [EKEvent eventWithEventStore:eventStore];
        event.title = _event.type.name;
        
        event.startDate = eventDateAndTime;
        event.location = _event.location.name;
        event.endDate = [[NSDate alloc] initWithTimeInterval:3600 sinceDate:event.startDate];
        
        // Check if App has Permission to Post to the Calendar
        [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
            if (granted){
                //---- code here when user allows your app to access their calendar.
                [event setCalendar:[eventStore defaultCalendarForNewEvents]];
                NSError *err;
                
                //add event
                if (setEvent) {
                    [eventStore saveEvent:event span:EKSpanThisEvent error:&err];
                }
                // remove event
                else {
                    NSLog(@"removeEvent");
                    
                    // Create the predicate from the event store's instance method
                    NSPredicate *predicate = [eventStore predicateForEventsWithStartDate:event.startDate
                                                                            endDate:event.endDate
                                                                          calendars:nil];
                    
                    // Fetch all events that match the predicate
                    NSArray *events = [eventStore eventsMatchingPredicate:predicate];
                    
                    //check if there's events with the same name at this time, remove them.
                    for(int i = 0; i < [events count]; i++) {
                        EKEvent *currentEvent = events[i];
                        NSLog(@"current Event Title: %@", currentEvent.title);
                        NSLog(@"to be deleted Event Title: %@", _event.type.name);
                        if([currentEvent.title isEqualToString:_event.type.name]){
                            NSLog(@"delete stuff");
                            [eventStore removeEvent:currentEvent span:0 commit:YES error:nil];
                        }
                    }
                    

                }
                
            }else
            {
                //----- code here when user does NOT allow your app to access their calendar.
                [event setCalendar:[eventStore defaultCalendarForNewEvents]];
                NSError *err;
                [eventStore saveEvent:event span:EKSpanThisEvent error:&err];
            }
        }];
    }
}