Question

I’m doing a fetch of data to show it in a UITableView, I do the fetch but I want to sort them by date of creation or by any sort method.

Here is the method:

-(NSArray *) lesStations {

NSManagedObjectContext *moc = [[AppDelegate sharedAppDelegate]managedObjectContext];

NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
NSEntityDescription *entity =  [NSEntityDescription entityForName:@"Station" inManagedObjectContext:moc];

[fetch setEntity:entity];
NSError *error;

NSArray *result = [moc executeFetchRequest:fetch error:&error];

if (!result) {
    return nil;
}

return result;

}

Answer 1

This should work

-(NSArray *) lesStations {

    NSManagedObjectContext *moc = [[AppDelegate sharedAppDelegate]managedObjectContext];

    NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity =  [NSEntityDescription entityForName:@"Station" inManagedObjectContext:moc];

    [fetch setEntity:entity];
    NSError *error;

    NSArray *result = [moc executeFetchRequest:fetch error:&error];

    if (!result) {
        return nil;
    }

    NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:"creationDate" ascending:YES];



    NSArray *sortedResults = [result sortedArrayUsingDescriptors:[NSArray arrayWithObject:sort]];

    [sort release];

    return sortedResults;

}