ios - 未根据给定的 EKRecurrenceRule 添加 EKEvent

Question

我正在尝试使用重复规则将事件添加到日历中 RRULE:FREQ=YEARLY;BYMONTH=6,7;BYDAY=1TH

因此根据此规则，事件应每年添加一次，即 6 月和 7 月的每个第一个星期四，直到我在我的项目中设置的过期日期。

在我的项目中，事件是根据重复规则创建的。使用以下代码，事件仅在 6 月的第一个星期四添加。为什么不在每个 7 月的第一个星期四也添加事件？

这里是.m文件代码

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self createEvent];
}

- (void)createEvent
{
    EKEventStore *eventStore = [[EKEventStore alloc] init];
    EKEvent *event = [EKEvent eventWithEventStore:eventStore];
    event.title = @"testRecurrenceRule";
    event.location = @"Dhaka";
    [event setCalendar:[eventStore defaultCalendarForNewEvents]];
    event.startDate = [self dateFromString:@"2013-06-18T21:00:00+06:00"];
    event.endDate = [self dateFromString:@"2013-06-18T22:00:00+06:00"];

    id recurrenceRule = [self recurrenceRuleForEvent];
    if(recurrenceRule != nil)
        [event addRecurrenceRule:recurrenceRule];

    if ([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])
    {
        // iOS 6 and later
        [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
            if (granted)
            {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self saveTheEvent:event eventStore:eventStore];
                    //[eventStore saveEvent:event span:EKSpanThisEvent error:error];
                });
            }
            else
            {
                dispatch_async(dispatch_get_main_queue(), ^{

                    //do nothing
                });
            }
        }];
    }
    else
    {
        [self saveTheEvent:event eventStore:eventStore];
    }

    textView.text = [NSString stringWithFormat:@"Event has been added with recurrence rule %@",recurrenceRule];
}

- (void)saveTheEvent:(EKEvent *)aEvent eventStore:(EKEventStore *)aStore
{
    [aStore saveEvent:aEvent span:EKSpanThisEvent error:NULL];
}

- (EKRecurrenceRule *)recurrenceRuleForEvent
{
    //just creating a recurrence rule for RRULE:FREQ=YEARLY;BYMONTH=6,7;BYDAY=1TH
    // setting the values directly for testing purpose.

    //FREQ=YEARLY
    EKRecurrenceFrequency recurrenceFrequency = EKRecurrenceFrequencyYearly;
    NSInteger recurrenceInterval = 1;                                             
    EKRecurrenceEnd *endRecurrence = nil;                                         
    NSMutableArray *monthsOfTheYearArray = [NSMutableArray array];               
    NSMutableArray *daysOfTheWeekArray = [NSMutableArray array];                
    NSMutableArray *daysOfTheMonthArray = [NSMutableArray array];               
    NSMutableArray *weeksOfTheYearArray = [NSMutableArray array];              
    NSMutableArray *daysOfTheYearArray = [NSMutableArray array];          
    NSMutableArray *setPositionsArray = [NSMutableArray array];         

    //BYMONTH=6,7
    [monthsOfTheYearArray addObject:[NSNumber numberWithInt:6]];
    [monthsOfTheYearArray addObject:[NSNumber numberWithInt:7]];

    //BYDAY=1TH
    [daysOfTheWeekArray addObject:[EKRecurrenceDayOfWeek dayOfWeek:5 weekNumber:1]];

    endRecurrence = [EKRecurrenceEnd recurrenceEndWithEndDate:[self dateFromString:@"2018-12-15T22:30+06:00"]];

    EKRecurrenceRule *recurrence = [[EKRecurrenceRule alloc] initRecurrenceWithFrequency:recurrenceFrequency
                                                                                interval:recurrenceInterval
                                                                           daysOfTheWeek:daysOfTheWeekArray
                                                                          daysOfTheMonth:daysOfTheMonthArray
                                                                         monthsOfTheYear:monthsOfTheYearArray
                                                                          weeksOfTheYear:weeksOfTheYearArray
                                                                           daysOfTheYear:daysOfTheYearArray
                                                                            setPositions:setPositionsArray
                                                                                     end:endRecurrence];
    return recurrence;
}

- (NSDate *)dateFromString:(NSString *)string
{
    //check if the date string in null
    if ([string length] == 0)
        return nil;

    NSString *dateString = nil;
    NSString *modifiedString = nil;
    BOOL secSpotMissing = false;

    NSRange range = [string rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"T"]];
    if (range.location != NSNotFound)
    {
        dateString = [string substringFromIndex:range.location];

        range = [dateString rangeOfCharacterFromSet:[NSCharacterSet characterSetWithCharactersInString:@"+-Z"]];
        if (range.location != NSNotFound)
        {
            //seperate the time portion of date string and checking second field is missing or not. like is it HH:mm or HH:mm:ss?
            if ([[[dateString substringToIndex:range.location] componentsSeparatedByString:@":"] count] < 3)
                secSpotMissing = true;

            //seperate the time zone portion and checking is there any extra ':' on it. It should like -0600 not -06:00. If it has that extra ':', just replacing it here.
            dateString = [dateString substringFromIndex:range.location];
            if([dateString hasSuffix:@"Z"])
                modifiedString = [dateString stringByReplacingOccurrencesOfString:@"Z" withString:@"+0000"];
            else
                modifiedString = [dateString stringByReplacingOccurrencesOfString:@":" withString:@""];
            string = [string stringByReplacingOccurrencesOfString:dateString withString:modifiedString];
        }
    }
    else
        return nil;

    // converting the date string according to it's format.
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    if (secSpotMissing)
        [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mmZZZ"];
    else
        [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZ"];
    return [dateFormatter dateFromString:string];
}

有人可以帮我解决这个问题吗？

Answer 1

这似乎是另一个问题的重复。基本上，根据“BYDAY”规则，YEARLY 频率的第一周表示一年中的第一周 - 而不是每个月的第一周。

@Shuvo，我没读过rfc。但这是 Apple 文档 EKRecurrenceDayOfWeek .

The EKRecurrenceDayOfWeek class represents a day of the week for use with an EKRecurrenceRule object. A day of the week can optionally have a week number, indicating a specific day in the recurrence rule’s frequency. For example, a day of the week with a day value of Tuesday and a week number of 2 would represent the second Tuesday of every month in a monthly recurrence rule, and the second Tuesday of every year in a yearly recurrence rule.

当您说“第一个星期四”时，这是正确的 - 除了每年的上下文，它是一年中的第一个星期四。