iOS EKEventStore事件保存在默认日历中，但不保存在其他自定义日历中

Question

我使用BOOL方法在自定义日历中保存事件，strForCalanderID具有calendarIdentifier值，但该事件不会保存在特定日历中。当我在默认日历上添加事件而不是在自定义或用户创建的日历中添加事件时，它工作正常。

-(BOOL)addEventOnICal:(NSMutableDictionary*)eventDict{
EKCalendar *calendar = nil;
    NSString *calendarIdentifier =strForCalanderID;//strForCalanderID=> custom Calendar identifier

    if (calendarIdentifier) {
        calendar = [eventStore calendarWithIdentifier:calendarIdentifier];
        calendar.title=strForCalanderName;
    }
    if (!calendar) {
        // http://stackoverflow.com/questions/7945537/add-a-new-calendar-to-an-ekeventstore-with-eventkit
        calendar = [EKCalendar calendarForEntityType:EKEntityTypeEvent eventStore:eventStore];


        for (EKSource *s in eventStore.sources) {
            if (s.sourceType == EKSourceTypeLocal) {
                calendar.source = s;
                break;
            }
        }
        NSString *calendarIdentifier = [calendar calendarIdentifier];
        NSError *error = nil;
        BOOL saved = [eventStore saveCalendar:calendar commit:YES error:&error];
        if (saved) {
        } else {
            // unable to save calendar
            return NO;
        }
    }
    // this shouldn't happen
    if (!calendar) {
        return NO;
    }
    [event setCalendar:[eventStore defaultCalendarForNewEvents]];
    event.location = @"Indore";
    event.title = @"Hello Test";
    // set the start date to the current date/time and the event duration to two hours
    event.startDate = StartDate;
    event.endDate = EndDate;


    NSError *error = nil;
    // save event to the callendar
    BOOL result = [eventStore saveEvent:event span:EKSpanThisEvent commit:YES error:&error];
    if (result) {
        return YES;
    } else {
        // NSLog(@"Error saving event: %@", error);
        // unable to save event to the calendar
        return NO;
    }
}