IOS: natural sort order

You can use localizedStandardCompare: as a selector in a sort descriptor to request a Core Data fetch like

NSSortDescriptor *titleSort = [[NSSortDescriptor alloc] initWithKey:@"title"
                                  ascending:YES 
                                   selector:@selector(localizedStandardCompare:)];
[fetchRequest setSortDescriptors:[titleSort]];

      

        
        
        
      

    

Swift 3:

let titleSort = NSSortDescriptor(key: "title",
                    ascending: true,
                    selector: #selector(NSString.localizedStandardCompare))
fetchRequest.sortDescriptors = [sortDescriptor]

      

        
        
        
      

    

or better

let titleSort = NSSortDescriptor(key: #keyPath(Entity.title),
                    ascending: true,
                    selector: #selector(NSString.localizedStandardCompare))
fetchRequest.sortDescriptors = [sortDescriptor]

      

        
        
        
      

    

where "Entity" is the name of the subclass of the managed data object.