How to clear selected objects in NSManagedObjectContext - objective-c

Question

I have the following code that currently clears all the objects in my NSManagedObjectContext:
- (void)clearObjectList:(NSString *)identifier
{
// TODO: Delete any entries with the identifier at the start of the object's name
NSLog(#"Clearing the URL list...");
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSFetchRequest * fetch = [[NSFetchRequest alloc] init];
[fetch setEntity:[NSEntityDescription entityForName:#"URL" inManagedObjectContext:context]];
NSArray * result = [context executeFetchRequest:fetch error:nil];
for (id basket in result)
{
// Code here to check if we should delete this object
[context deleteObject:basket];
}
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
//abort();
}
}
The Data model I have for URL is:
dateAccessed: Date
name: String
url: String
I want to access the objects key name to determine if it should be removed. How do I access this?

Answer 1

Try this:
for(URL *basket in result)
{
if([basket.name isEqualToString:identifier])
[context deleteObject:basket];
}

Answer 2

When looping through your results, you know that all you'll get back is NSManagedObjects. Or, if you've created NSManagedObject subclasses, you'll only get back URL objects. Thus, you can replace id with either NSManagedObject * or URL * in your for loop.
If you did create subclasses, which I'd recommend, you can access the name with dot notation: basket.name. If you didn't, you can access it by calling [basket valueForKey:#"name"].