How would I add only business days to an NSDate?

Question

I have an issue related to calculating business days in Objective-C.

I need to add X business days to a given NSDate.

For example, if

Answer 1

this answer is late to the party but…. I thought i might improve on above answers to determine business days by working with NSDateComponents directly of your date in a nice loop.

#define CURRENTC [NSCalendar currentCalendar]
#define CURRENTD [NSDate date]

NSInteger theWeekday;

    NSDateComponents* temporalComponents = [[NSDateComponents alloc] init];

[temporalComponents setCalendar:CURRENTC];
[temporalComponents setDay:   13];
[temporalComponents setMonth: 2];
[temporalComponents setYear: theYear];

// CURRENTC =the current calendar which determines things like how 
// many days in week for local,  also the critical “what is a weekend”
// you can also convert a date directly to components.  but the critical thing is
// to get the CURRENTC in, either way.

   case 3:{    // the case of finding business days
        NSDateComponents* startComp = [temporalComponents copy];  // start date components

        for (int i = 1; i <= offset; i++)  //offset is the number of busi days you want.
        {
            do {
                [temporalComponents setDay:   [temporalComponents day] + 1];
                NSDate* tempDate = [CURRENTC dateFromComponents:temporalComponents];
                theWeekday = [[CURRENTC components:NSWeekdayCalendarUnit fromDate:tempDate] weekday];
            } while ((theWeekday == 1) || (theWeekday == 7));
        }
        [self findHolidaysStart:startComp end:temporalComponents];  // much more involved routine.

        [startComp release];
        break;
     }

// use startComp and temporalcomponents before releasing

// temporalComponents now contain an offset of the real number of days 
// needed to offset for busi days.  startComp is just your starting date….(in components)
// theWeekday is an integer between 1 for sunday, and 7 for saturday,  (also determined
// by CURRENTC

turning this back into NSDate, and you are done. Holidays are much more involved.. but can actually be calculated if just using federal holidays and a few others. because they are always something like “3rd monday of January”

here is what the findHolidaysStart:startComp end: starts out like, you can imagine the rest.

// imported

    [holidayArray addObject:[CURRENTC dateFromComponents:startComp]];
    [holidayArray addObject:[CURRENTC dateFromComponents:endComp]];


// hardcoded

   dateComponents = [[NSDateComponents alloc] init];
    [dateComponents setCalendar:CURRENTC];
    [dateComponents setDay:   1];
    [dateComponents setMonth: 1];
    [dateComponents setYear: theYear];

    theWeekday = [[CURRENTC components:NSWeekdayCalendarUnit fromDate:[CURRENTC dateFromComponents:dateComponents]] weekday];

    if (theWeekday == 1) [dateComponents setDay:2];
    if (theWeekday == 7) {[dateComponents setDay:31]; [dateComponents setYear: theYear-1];}

    [holidayArray addObject:[CURRENTC dateFromComponents:dateComponents]];
    [dateComponents release];