iPhone CoreData : Displaying and saving Dates

Question

I have some real issues with display and saving a date. Its setup in coredata as a NSData.

I use the following to display the date but fails (datestring is returned as nil). If I make a new date (e.g not from coredata) then its fine.

NSDate *date = (NSDate *) [[selectedObject valueForKey:@"timeStamp"] description];

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"dd-MM-yy"];
NSString *dateString = [dateFormat stringFromDate:date];

To save it I was trying to use

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"dd-MM-yy"];
NSDate *date = [dateFormat dateFromString:dateString];
[selectedObject setValue:date forKey:@"timeStamp"];

Is there something special about dates stored in coredata?

`description` method returns NSString, not NSDate, and you cannot cast one to the other. Why don't you save NSDate as date? Core Data explicitly supports dates. — Costique, Feb 04 '11 at 13:35
Why are trying to store the dates as `NSData` or is that a Typo? — Joe, Feb 04 '11 at 13:36
what's the result of `[date description]`? is it the date you expect? — Benedict Cohen, Feb 04 '11 at 13:37

score -1 · Accepted Answer · answered Feb 04 '11 at 14:03

-1

The problem was that I was using managedObject instead of a class for my coreData : Sorry

answered Feb 04 '11 at 14:03

Burf2000

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iPhone CoreData : Displaying and saving Dates

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