How to add a number of weeks to an NSDate?

Question

I have in the past used the below function to add on a specific time interval using NSDateComponents to an existing date.

(NSDate *)dateByAddingComponents:(NSDateComponents *)comps
                          toDate:(NSDate *)date
                         options:(NSCalendarOptions)opts

From iOS8 the week value is deprecated for NSDateComponents, which means I can't achieve what I want to do: generate a new NSDate by adding a certain number of weeks to a given NSDate.

Any help would be greatly appreciated.

Answer 1

Update: As Zaph said in his answer, Apple actually recommends using weekOfYear or weekOfMonth instead of the answer I provided. View Zaph's answer for details.

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You'll probably quickly realize that you're overthinking it, but here's how you can add a certain number of weeks to a date even though the week value's been deprecated, ex:

NSDateComponents *comp = [NSDateComponents new];
int numberOfDaysInAWeek = 7;
int weeks = 3; // <-- this example adds 3 weeks
comp.day = weeks * numberOfDaysInAWeek;

NSDate *date = [[NSCalendar currentCalendar] dateByAddingComponents:comp toDate:date options:0];