NSCalendar first day of week

by

Edit: This does not check the edge case where the beginning of the week starts in the prior month. Some updated code to cover this: https://stackoverflow.com/a/14688780/308315

In case anyone is still paying attention to this, you need to use 

ordinalityOfUnit:inUnit:forDate:

and set firstWeekday to 2. (1 == Sunday and 7 == Saturday)

Here’s the code:

NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
[gregorian setFirstWeekday:2]; // Sunday == 1, Saturday == 7
NSUInteger adjustedWeekdayOrdinal = [gregorian ordinalityOfUnit:NSWeekdayCalendarUnit inUnit:NSWeekCalendarUnit forDate:[NSDate date]];
NSLog(@"Adjusted weekday ordinal: %d", adjustedWeekdayOrdinal);

Remember, the ordinals for weekdays start at 1 for the first day of the week, not zero.

Documentation link.

More Related Contents:

  1. HTML character decoding in Objective-C / Cocoa Touch
  2. How can I upload a photo to a server with the iPhone?
  3. Understanding reference counting with Cocoa and Objective-C
  4. Changing my CALayer’s anchorPoint moves the view
  5. When do you make an underscore in front of an instance variable? [duplicate]
  6. Why do you use an underscore for an instance variable, but not its corresponding property? [duplicate]
  7. What are best practices that you use when writing Objective-C and Cocoa? [closed]
  8. How to write data in plist?
  9. Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application
  10. Open Source Cocoa/Cocoa-Touch POP3/SMTP library?
  11. Do you need to create an NSAutoreleasePool within a block in GCD?
  12. Arguments in @selector
  13. Interaction beyond bounds of UIView
  14. iPhone: Convert date string to a relative time stamp
  15. Ordinal Month-day Suffix Option for NSDateFormatter setDateFormat
  16. writing NSDictionary to plist in my app bundle
  17. Memory Management in Objective-C [duplicate]
  18. What’s the best way to put a c-struct in an NSArray?
  19. Font size in pixels
  20. Obtaining an NSDecimalNumber from a locale specific string?
  21. NSLocale currentLocale always returns “en_US” not user’s current language
  22. Using MD5 hash on a string in cocoa? [duplicate]
  23. motionBegan: Not Working
  24. Correcting floating point numbers
  25. Lower case “k” in Cocoa
  26. Why tack a protocol of NSObject to a protocol implementation
  27. How do you explicitly animate a CALayer’s backgroundColor?
  28. Get video NSData from ALAsset url iOS
  29. Convert hex data string to NSData in Objective C (cocoa)
  30. How to add NSDebug.h and use NSZombie in iPhone SDK

Leave a Comment