Question

I am having an issue with a simple for loop setup in my app. Upon reaching the second for loop, my app crashes and I get the error below:

for (NSArray *a in dict)
            {
                for (NSString *s in a)
                {

                }
            }

Error:

-[__NSCFString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x1c5b6810

This seems slightly strange. I just want to look at each array in my dictionary, then as I get to them in the loop, check the strings in those arrays.

Answer 1

You probably want something like this:

for (NSArray *a in [dict allValues])

since based on your error message, your keys appear to be strings (__NSCFString). The behaviour of for (NSArray *s in dict) is to enumerate the keys of the dictionary.