"Invalid date component" error when set startDateComponents in an EKReminder - iphone

Question

I want to save a reminder, but when I set the StartDateComponents, it always says Invalid date component. I try several ways(you can see my commented code) to set the value, but failed.
EKReminder *reminder = [EKReminder reminderWithEventStore:appDelete.eventStore];
NSCalendar *gregorian = [NSCalendar currentCalendar];//[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
reminder.title = #"title";
NSString *timeStr = #"20121115070800";
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setCalendar:gregorian];
[inputFormatter setDateFormat:#"yyyyMMddHHmmss"];
[inputFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"UTC"]];
NSDate *parseDate = [inputFormatter dateFromString:timeStr];
NSDateComponents *dateComponents = [gregorian components:( NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit )
fromDate:parseDate];
NSDateComponents *timeComponents = [gregorian components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
fromDate:parseDate];
NSDateComponents *dateComps = [[NSDateComponents alloc] init];
[dateComps setDay:[dateComponents day]];
[dateComps setMonth:[dateComponents month]];
[dateComps setYear:[dateComponents year]];
[dateComps setHour:[timeComponents hour]];
// Notification will fire in one minute
[dateComps setMinute:[timeComponents minute]];
[dateComps setSecond:[timeComponents second]];
[dateComps setTimeZone:[NSTimeZone localTimeZone]];
reminder.calendar = /*[NSCalendar autoupdatingCurrentCalendar];*/[eventStore defaultCalendarForNewEvents];
reminder.calendar = [EKCalendar calendarWithEventStore:eventStore];
//NSDateComponents *comp = [[NSDateComponents alloc] init];
/*comp.calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
comp.year = [[timeStr substringToIndex:3] integerValue];
comp.month = [[timeStr substringWithRange:NSMakeRange(4,2)] integerValue];
comp.day = [[timeStr substringWithRange:NSMakeRange(6, 2)] integerValue];
comp.hour = [[timeStr substringWithRange:NSMakeRange(8, 2)] integerValue];
comp.minute = [[timeStr substringWithRange:NSMakeRange(10, 2)] integerValue];
comp.second = [[timeStr substringWithRange:NSMakeRange(12, 2)] integerValue];*/
//reminder.startDateComponents = [gregorian components: (NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit/*|NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit*/) fromDate:parseDate];
[reminder setStartDateComponents:dateComps];// this line will throw the error:Invalid date component

Answer 1

It seemed the main issue was these 2 lines:
reminder.calendar = /*[NSCalendar autoupdatingCurrentCalendar];*/[eventStore defaultCalendarForNewEvents];
reminder.calendar = [EKCalendar calendarWithEventStore:eventStore];
Replace with this line:
reminder.calendar = [eventStore defaultCalendarForNewReminders];
Here are the complete working code that also included a little extra for completeness:
EKEventStore *eventStore = [[EKEventStore alloc] init];
[eventStore requestAccessToEntityType:EKEntityMaskEvent completion:^(BOOL granted, NSError *error) {
if (granted)
{
EKReminder *reminder = [EKReminder reminderWithEventStore:eventStore];
NSCalendar *gregorian = [NSCalendar currentCalendar];//[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
reminder.title = #"title44433333";
NSString *timeStr = #"20121115070800";
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setCalendar:gregorian];
[inputFormatter setDateFormat:#"yyyyMMddHHmmss"];
[inputFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"UTC"]];
NSDate *parseDate = [inputFormatter dateFromString:timeStr];
NSDateComponents *dateComponents = [gregorian components:( NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit )
fromDate:parseDate];
NSDateComponents *timeComponents = [gregorian components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
fromDate:parseDate];
NSDateComponents *dateComps = [[NSDateComponents alloc] init];
[dateComps setDay:[dateComponents day]];
[dateComps setMonth:[dateComponents month]];
[dateComps setYear:[dateComponents year]];
[dateComps setHour:[timeComponents hour]];
// Notification will fire in one minute
[dateComps setMinute:[timeComponents minute]];
[dateComps setSecond:[timeComponents second]];
[dateComps setTimeZone:[NSTimeZone localTimeZone]];
reminder.calendar = [eventStore defaultCalendarForNewReminders]; //here is the replacement
[reminder setStartDateComponents:dateComps];// this line will throw the error:Invalid date component
NSError *error = nil;
[eventStore saveReminder:reminder commit:YES error:&error];
if (error) NSLog(#"error = %#", error);
}
}];