如何按特定属性按降序对自定义对象的NSArray进行排序？

Question

How do I make this piece of code to order in descending order. This code always gives me the array in ascending order:

NSArray *sortedProductsByStyle = [unsortedProducts sortedArrayUsingComparator: ^(Product *p1, Product *p2) {
        return [p1.productStyle compare:p2.productStyle options:NSNumericSearch];
    }];

I thought that using NSOrderedDescending would work but it didn't:

NSArray *sortedProductsByStyle = [unsortedProducts sortedArrayUsingComparator: ^(Product *p1, Product *p2) {
        return [p1.productStyle compare:p2.productStyle options:NSNumericSearch | NSOrderedDescending];
    }];

Any ideas?

Answer 1

How about just inverting the compare order?

NSArray *sortedProductsByStyle = [unsortedProducts sortedArrayUsingComparator: ^(Product *p1, Product *p2) {
    return [p2.productStyle compare:p1.productStyle options:NSNumericSearch];
}];

Answer 2

Try this way...

sortedArray = [unsortedProducts sortedArrayUsingComparator:^(Product p1 , Product p2) {
            return [((NSString *)p1.productStyle) compare:((NSString *)p2.productStyle) options:NSNumericSearch];
        }];

Let me know if you have any problem.