How do you calculate the day of the year for a specific date in Objective-C?

by

Try this:

NSCalendar *gregorian =
   [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSUInteger dayOfYear =
   [gregorian ordinalityOfUnit:NSDayCalendarUnit
     inUnit:NSYearCalendarUnit forDate:[NSDate date]];
[gregorian release];
return dayOfYear;

where date is the date you want to determine the day of the year for. The documentation on the NSCalendar.ordinalityOfUnit method is here.

More Related Contents:

  1. NSDate Format outputting wrong date
  2. How to parse a date string into an NSDate object in iOS?
  3. NSDateFormatter, am I doing something wrong or is this a bug?
  4. Why NSDateFormatter can not parse date from ISO 8601 format [duplicate]
  5. NSDateFormatter and yyyy-MM-dd
  6. Convert NSString of a date to an NSDate
  7. NSDateFormatter and Time Zone issue?
  8. How to compare two NSDates: Which is more recent?
  9. Comparing two NSDates and ignoring the time component
  10. Ordinal Month-day Suffix Option for NSDateFormatter setDateFormat
  11. How Do I write a Timer in Objective-C?
  12. How to change the format of date in date picker
  13. Objective-C setting NSDate to current UTC
  14. Difference between two NSDate objects — Result also a NSDate
  15. Removing time components from an NSDate object using Objective C/Cocoa
  16. How to Get time difference in iPhone
  17. UIDatePicker, setting maximum and minimum dates based on todays date
  18. Formatting date and time with iPhone SDK?
  19. Custom UINavigationBar Background
  20. How to retrieve user’s current city name?
  21. How can we store into an NSDictionary? What is the difference between NSDictionary and NSMutableDictionary?
  22. UIBezierPath Subtract Path
  23. How to define a global variable that can be accessed anywhere in my application? [duplicate]
  24. How get a datetime column in SQLite with Objective C
  25. How to use NSXMLParser to parse parent-child elements that have the same name
  26. Purpose of @ Symbol Before Strings?
  27. Adding files to separate targets in Xcode 4
  28. UITableView reload data
  29. Exception Types in iOS crash logs
  30. how to properly use insertRowsAtIndexPaths?

Leave a Comment