Question

I’m totally new to iPhone/OSX development and I’m trying to sort an NSMutableArray filled with objects in alphabetical order but I fail. Items starting with Å or Ä ends up with items starting with A and items starting with Ö ends up with items starting with O. I have tried different sorting methods that I have found here on Stackoverflow but none of them seems to work (for me at least)

    NSSortDescriptor* stationDescriptor = [[NSSortDescriptor alloc]initWithKey:@"name" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)];
    NSArray* descriptors = [NSArray arrayWithObject:stationDescriptor];
    [stations sortUsingDescriptors:descriptors];


    [stations sortUsingComparator:^NSComparisonResult(Station* obj1, Station* obj2){
        return [[obj1 name] localizedCaseInsensitiveCompare:[obj2 name]];
    }];

Ok, progress! I have been successful in getting this to work by changing the language on the emulator to Swedish, is there any way I can get the same result when the phone is set to English? I know in C# you can send in a reference to a specific culture when sorting/comparing strings.

/Viktor

Answer 1

Looking at the docs for NSString gives you the answer.

You are using localizedCaseInsensitiveCompare: and the docs for this state

blah blah blah

See Also
– compare:options:range:locale:

So jumping to the docs for compare:options:range:locale: you can figure it out. You’ll need something like

return [[obj1 name] compare:[obj2 name]
                    options:NSCaseInsensitiveSearch
                      range:NSMakeRange(0, [obj1 length])
                     locale:whateverLocaleYouWant];