In that array of sort descriptors, you'd need to pass two of them. The first to
sort by type and the second to sort by date. The second sort descriptor would
only be used if two objects are sorted as equal by the first descriptor.
Dave
Sent from my iPhone
On Apr 27, 2011, at 6:59 AM, Martin Batholdy <batho...@googlemail.com> wrote:
> Hi,
>
> I have an array of dictionaries.
>
> One dictionary-entry looks like this:
>
> {
> ID = 34;
> counter = 2;
> date = "2011-04-19 15:43:52 +0200";
> title = "test.pdf";
> type = file;
> }
>
> Now I would like to sort my array of dictionaries first by type and then
> (within the type-dictionaries) by date.
>
> I can sort my array by one critierion with a NSSortDescriptor:
>
> NSSortDescriptor *descriptor;
> descriptor = [[NSSortDescriptor alloc] initWithKey:@"date" ascending:NO];
> [bookmarks sortUsingDescriptors:[NSArray arrayWithObjects:descriptor, nil]];
>
>
> but how can I first "group" the dictionaries by type and then within the
> types sort them by date?
> (so use two sorting-criteria with a different priority)
>
>
>
> thanks for any suggestions!_______________________________________________
>
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