Delete an object after a certain time

Question

Hi,

I get a bunch of objects from core data and put them into an array, like this:

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"completed" ascending:YES];

NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];

NSMutableArray *sortedIngredients = [[NSMutableArray alloc] initWithArray:[event.tags allObjects]];
[sortedIngredients sortUsingDescriptors:sortDescriptors];


NSPredicate *predicate = [NSPredicate predicateWithFormat: @"completed == nil"];

[sortedIngredients filterUsingPredicate: predicate]; 

NSArray *incompletedArray = [[NSArray alloc] initWithArray: sortedIngredients]; 

[sortDescriptor release];
[sortDescriptors release];
[sortedIngredients release];

I want the object that are older then 2 days to be deleted from core data.

By using this function, I can get the date when an object was created:

NSLog(@"Object at index: %@", [incompletedArray objectAtIndex: 1]);

The output is this:

2009-09-30 17:48:42.490 TaggedLocations[11428:207] String: (entity: Tag; id: 0x3c39ba0 ; data: { completed = nil; creationDate = 2009-09-30 17:45:24 -1000; events = 0x3e10060 ; info = nil; name = 1; })

I have no idea how to delete the objects that are older then 2 days.

Any help would be highly appreciated.

Thanks in advance!