Objective C custom array sorting algorithm error

Question

I am sorting an array of custom winery objects by a name attribute.

wineryNames = [NSMutableArray arrayWithArray:[wineryNames sortedArrayUsingComparator:^(Winery *a, Winery *b){
    return [a.getName compare:b.getName options:NSCaseInsensitiveSearch];
}]];

I am receiving an error on the return line and the log says 'unrecognized selector'. I have no idea why this isn't working.

Is `wineryNames` definitely an array containing `Winery` objects? And, what does the `@interface` declaration for the Winery class look like? Does it have a method or property called `getName`? — Mike Mertsock, May 12 '14 at 03:40
Thank you so much esker. It was an array containing NSString objects, not Winery objects. I don't know why I didn't see it, I guess it was just make my head hurt type code and I made a few other classes with code similar to what I posted. But thank you - it works now. — user3626968, May 12 '14 at 04:18

score 2 · Answer 1 · edited May 23 '17 at 12:27

I think this will do the job:

NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name"
                                                                 ascending:YES
                                                                  selector:@selector(caseInsensitiveCompare:)];
NSArray *sortedArray = [wineryNames sortedArrayUsingDescriptors:@[sortDescriptor]];

More info Here!

Objective C custom array sorting algorithm error

1 Answers1