I want to get the Week number of the year from the date.I tried the code as follow but gives me a wrong week number.
My code for week number:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"YYYY-MM-dd"];
NSDate *date = [dateFormatter dateFromString:@"2012-09-15"];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSLog(@"week: %i", [[calendar components: NSWeekOfYearCalendarUnit fromDate:date] weekOfYear]); //Display 38 instead of 37
}
Note: If i try with with [NSDate date]
display the correct.
Help me to solve this.. Thank you,
ObjectiveC:
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *dateComponent = [calendar components:(NSWeekOfYearCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:[NSDate date]];
NSLog(@"%@",dateComponent);
Update
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *dateComponent = [calendar components:(NSCalendarUnitWeekOfYear | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear) fromDate:date];
NSLog(@"%@",dateComponent);
Swift:
let calendar = NSCalendar.currentCalendar()
let dateComponent = calendar.components([.WeekOfYear, .Day, .Month, .Year], fromDate: NSDate(timeIntervalSinceNow: 0))
print("weekOfYear \(dateComponent.weekOfYear)")
Swift 3 - Swift 5:
let component = Calendar.current.component(.weekOfYear, from: Date())
print("Week of Year \(component)")
[NSCalendar currentCalendar]
gives you a Gregorian Calendar as default. You can use
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSISO8601Calendar];
to get an ISO 08601 conform calendar, which has week number 37 for your date.
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