Question

I would like to create a custom error domain for my application. I have an enumerated NSInteger type that covers all possible error codes I can get, my question is how do I associate these with my custom domain? Thanks.

Answer 1

Your domain is just a string naming it. You don’t need to register it anywhere.

In your header with your error codes, add this line:

extern NSString *const MyErrorDomain;

And in your implementation file:

NSString *const MyErrorDomain = @"MyErrorDomain";

Then you can use that named constant for your error domain. Done!