Question

I use this a lot

NSSortDescriptor *descriptor = [NSSortDescriptor sortDescriptorWithKey:nil 
                       ascending:YES 
                       comparator:^(id obj1, id obj2) {
                       return [obj1 compare:obj2 options:NSNumericSearch];
                       }];

I would like to create a compiler define like this

#define descriptor [NSSortDescriptor sortDescriptorWithKey:nil 
                       ascending:YES 
                       comparator:^(id obj1, id obj2) {
                       return [obj1 compare:obj2 options:NSNumericSearch];
                      }]

so I can use it on all parts of my code without having to declare it all times and use it on stuff like

mySortedArray = [myArray sortedArrayUsingDescriptors:[NSArray arrayWithObject:descriptor]];

. I have tried this and received a ton of errors from Xcode. Is there a way to define that?

thanks

Answer 1

You were almost there:

#define descriptor [NSSortDescriptor sortDescriptorWithKey:nil \
                                                 ascending:YES \
                                                comparator:^(id obj1, id obj2) { \
                                      return [obj1 compare:obj2 options:NSNumericSearch];}]

Then:

NSArray *sorted = [myArray sortedArrayUsingDescriptors:[NSArray arrayWithObject:descriptor]];

The reason you get errors is because you should use \ when going to a new line. Also -sortedArrayUsingDescriptors requires an array…