根據EKRecurrenceRule不添加EKEvent

我正試圖在日曆上創建重複事件。我創建了一個EKRecurrenceRule並將其設置爲該事件。但事件不是根據我的重複規則創建的。根據EKRecurrenceRule不添加EKEvent

這裏是我的代碼，

 //just creating a recurrence rule for RRULE:FREQ=YEARLY;BYMONTH=6,7;BYDAY=1TH 
     // setting the values directly for testing purpose. 

     EKRecurrenceEnd *endRecurrence = nil;           
     NSMutableArray *monthsOfTheYearArray = [NSMutableArray array];    
     NSMutableArray *daysOfTheWeekArray = [NSMutableArray array]; 

     //BYMONTH=6,7 (6 for june, 7 for july) 
     [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"]]; 


     //create the recurrence rule here 
     EKRecurrenceRule *recurrence = [[EKRecurrenceRule alloc] initRecurrenceWithFrequency: EKRecurrenceFrequencyYearly 

                        interval:1 
                       daysOfTheWeek:daysOfTheWeekArray 
                       daysOfTheMonth:nil 
                      monthsOfTheYear:monthsOfTheYearArray 
                       weeksOfTheYear:nil 
                       daysOfTheYear:nil 
                       setPositions:nil 
                         end:endRecurrence]; 



     //setting the values for creating the event here 
     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"]; 
     [event addRecurrenceRule: recurrence]; 

     //save the event into calendar. 
     [self saveTheEvent:event eventStore:eventStore];

有了這個代碼的事件正在只能在每月的月1日的每個星期四，爲什麼被跳過7月設立的？
請讓我知道爲什麼事件不是根據我設置的重複規則創建的。

來源

2013-08-22 user2705947