NSDateFormatter gregorianStartDate example ios

gregorianStartDate

Returns the start date of the Gregorian calendar for the receiver.

- (NSDate *)gregorianStartDate

Return Value

The start date of the Gregorian calendar for the receiver.

Example of [NSDateFormatter gregorianStartDate]

CFGregorianDate gregorianStartDate, gregorianEndDate;
    CFGregorianUnits startUnits = {-10, 0, 0, 0, 0, 0};
    CFGregorianUnits endUnits = {10, 0, 0, 0, 0, 0};
    CFTimeZoneRef timeZone = CFTimeZoneCopySystem();

    gregorianStartDate = CFAbsoluteTimeGetGregorianDate(
                                                        CFAbsoluteTimeAddGregorianUnits(CFAbsoluteTimeGetCurrent(), 
                                                        timeZone, 
                                                        startUnits),
                                                        timeZone);
    gregorianStartDate.hour = 0;
    gregorianStartDate.minute = 0;
    gregorianStartDate.second = 0;

    gregorianEndDate = CFAbsoluteTimeGetGregorianDate(
                                                      CFAbsoluteTimeAddGregorianUnits(CFAbsoluteTimeGetCurrent(), 
                                                      timeZone,
                                                      endUnits),
                                                      timeZone);
    gregorianEndDate.hour = 0;
    gregorianEndDate.minute = 0;
    gregorianEndDate.second = 0;

    NSDate* startDate =
    [NSDate dateWithTimeIntervalSinceReferenceDate:CFGregorianDateGetAbsoluteTime(gregorianStartDate, timeZone)];
    NSDate* endDate =
    [NSDate dateWithTimeIntervalSinceReferenceDate:CFGregorianDateGetAbsoluteTime(gregorianEndDate, timeZone)];

NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init]autorelease];
[dateFormatter setTimeStyle:NSDateFormatterNoStyle];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
NSLocale *usLocale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]autorelease];
[dateFormatter setLocale:usLocale];