Re: Re: Sorting
Re: Re: Sorting
- Subject: Re: Re: Sorting
- From: Guy English <email@hidden>
- Date: Wed, 16 Feb 2005 10:52:32 -0500
See NSSortDescriptor initWithKey:ascending:selector:
Normally NSSortDescriptor will just call compare: on both objects.
Using the method above you can tell it to call a different compare
method. So...
sd = [[NSSortDescriptor alloc] initWithKey: @"name" ascending: YES
selector: @selector( compareNumerically: )];
Will do what you want assuming you've implemented compareNumerically
for the objects in the array.
Guy
On Wed, 16 Feb 2005 15:23:39 +0100, Peter Karlsson <email@hidden> wrote:
> I found a nice example at this url:
>
> http://www.oomori.com/cocoafw/Foundation/NSMutableArray/sortUsingDescriptors
> .html
>
> I have tried this and it works except one thing. This is the result:
>
> HRPORG
> NINA1
> NINA10
> NINA8
> PLKATK
>
> I want it to be like this:
>
> HRPORG
> NINA1
> NINA8
> NINA10
> PLKATK
>
> That worked when I just sorted strings like this:
>
> - (NSComparisonResult)compareNumerically:(NSString *)string
> {
> return [self compare:string options:(NSNumericSearch |
> NSCaseInsensitiveSearch)];
> }
>
> So my question is, is it possible to use NSNumericSearch in this case?
>
> Peter
>
> Ursprungligt meddelande
>
> > You need to check out:
> >
> > NSArray sortedArrayUsingDescriptors
> >
> > and
> >
> > NSSortDescriptors
> >
> >
> > That should take care of it for you.
> >
> > - August
> >
> >
> >
> > On Feb 16, 2005, at 7:31 AM, Peter Karlsson wrote:
> >
> > > Hi!
> > >
> > > To read and write the array is not a problem. The problem is how to
> > > sort
> > > it. Do you maybe have some example code to show me?
> > >
> > > Peter
> > >
> > > Ursprungligt meddelande
> > >
> > >> Hi Peter,
> > >>
> > >> I'm not sure how other people would recommend you do this, but my idea
> > >> would be to sort the array in your app (like you have) and then
> > >> overwrite the array's value in the plist file using the setObject:
> > >> forKey: method (using the same key, of course).
> > >>
> > >> In other words:
> > >> 1) Read the array from the plist file.
> > >> 2) Sort the array.
> > >> 3) Write the array to the plist file using the same key you used to
> > >> access it.
> > >>
> > >> I think that'd be the only way you could do it.
> > >>
> > >> Kiel :-)
> > >> "Your friend is the person who knows all about you and still likes
> > >> you."
> > >> Elbert Green Hubbard
> > >>
> > >> _______________________________________________
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