Get week number and the date for monday and sunday in the current week (Objective-C on iOS)

Question

how is it possible to get the current weeknumber and the date of monday and sunday in the current week?

Answer 1

I'm not sure how effeicient this is as it's mainly thrown together from, other answers

• NSCalendar first day of week
• How to check what day of the week it is (i.e. Tues, Fri?) and compare two NSDates?)

and a quick skim of the apple docs for

• NSCalendar
• NSDateComponents
• NSDate

Example:

NSDate *today = [NSDate date];

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
gregorian.firstWeekday = 2; // Sunday = 1, Saturday = 7

NSDateComponents *components = [gregorian components:NSWeekOfYearCalendarUnit fromDate:today];

NSUInteger weekOfYear = [components weekOfYear];

NSDate *mondaysDate = nil;
[gregorian rangeOfUnit:NSWeekCalendarUnit startDate:&mondaysDate interval:NULL forDate:today];

NSLog(@"%ld %@", weekOfYear, mondaysDate);