- (void)saveEvent:(id)sender {                //事件市场    EKEventStore *eventStore = [[EKEventStore alloc] init];        //6.0及以上通过下面方式写入事件    if ([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])    {        // the selector is available, so we must be on iOS 6 or newer        [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {            dispatch_async(dispatch_get_main_queue(), ^{                if (error)                {                    //错误细心                    // display error message here                }                else if (!granted)                {                    //被用户拒绝，不允许访问日历                    // display access denied error message here                }                else                {                    // access granted                    // ***** do the important stuff here *****                                        //事件保存到日历                                                            //创建事件                    EKEvent *event  = [EKEvent eventWithEventStore:eventStore];                    event.title     = @"哈哈哈，我是日历事件啊";                    event.location = @"我在杭州西湖区留和路";                                        NSDateFormatter *tempFormatter = [[NSDateFormatter alloc]init];                    [tempFormatter setDateFormat:@"dd.MM.yyyy HH:mm"];                                        event.startDate = [[NSDate alloc]init ];                    event.endDate   = [[NSDate alloc]init ];                    event.allDay = YES;                                        //添加提醒                    [event addAlarm:[EKAlarm alarmWithRelativeOffset:60.0f * -60.0f * 24]];                    [event addAlarm:[EKAlarm alarmWithRelativeOffset:60.0f * -15.0f]];                                        [event setCalendar:[eventStore defaultCalendarForNewEvents]];                    NSError *err;                    [eventStore saveEvent:event span:EKSpanThisEvent error:&err];                                        UIAlertView *alert = [[UIAlertView alloc]                                          initWithTitle:@"Event Created"                                          message:@"Yay!?"                                          delegate:nil                                          cancelButtonTitle:@"Okay"                                          otherButtonTitles:nil];                    [alert show];                                        NSLog(@"保存成功");                                    }            });        }];    }    else    {        // this code runs in iOS 4 or iOS 5        // ***** do the important stuff here *****                //4.0和5.0通过下述方式添加                //保存日历        EKEvent *event  = [EKEvent eventWithEventStore:eventStore];        event.title     = @"哈哈哈，我是日历事件啊";        event.location = @"我在杭州西湖区留和路";                NSDateFormatter *tempFormatter = [[NSDateFormatter alloc]init];        [tempFormatter setDateFormat:@"dd.MM.yyyy HH:mm"];                event.startDate = [[NSDate alloc]init ];        event.endDate   = [[NSDate alloc]init ];        event.allDay = YES;                        [event addAlarm:[EKAlarm alarmWithRelativeOffset:60.0f * -60.0f * 24]];        [event addAlarm:[EKAlarm alarmWithRelativeOffset:60.0f * -15.0f]];                [event setCalendar:[eventStore defaultCalendarForNewEvents]];        NSError *err;        [eventStore saveEvent:event span:EKSpanThisEvent error:&err];                UIAlertView *alert = [[UIAlertView alloc]                              initWithTitle:@"Event Created"                              message:@"Yay!?"                              delegate:nil                              cancelButtonTitle:@"Okay"                              otherButtonTitles:nil];        [alert show];                NSLog(@"保存成功");            }}