Question

In objective C, what is a better way of doing this:

if ([response class] == [nil class])

response is either a NSDictionary or NSMutableDictionary

The code is working but I’m getting a "Invalid receiver type 'void *' or "comparison of distinct Objective-C types 'Class' and 'struct NSMutableDictionary *' lacks a cast" warning messages

Thanks

Answer 1

If you’re actually looking to test [response class], instead of the value of response itself, you’ll want to use

if ([response isKindOfClass:[NSNull class])

If you’re looking to check if response itself is nil, I describe a nice way of doing this in this answer to a similar question.