Question

I have a array of objects and need to sort it by rating and after by number of votes descendent(so that if two 5 stars rated elements compare, the one with the most votes should be first)

Is it possible to sort a NSArray by two descriptors:first after rating and then after votes count?

I’ve found on http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSSortDescriptor_Class/Reference/Reference.html

something like sortUsingDescriptors: but i can’t find it anywhere in the docs, think it’s deprecated.

Answer 1

Yes you can:

NSSortDescriptor *sortRating = [[NSSortDescriptor alloc] initWithKey:@"rating" ascending:NO];
NSSortDescriptor *sortVotes = [[NSSortDescriptor alloc] initWithKey:@"votes" ascending:NO];

NSArray *sortedArray = [orignalAray sortedArrayUsingDescriptors:[NSArray arrayWithObjects:sortRating, sortVotes, nil]];
[sortRating release], sortRating = nil;
[sortVotes release], sortVotes = nil;