NSMutableArray addObject: -[__NSArrayI addObject:]: unrecognized selector sent to instance

Question

I have tried to initialize my NSMutableArray 100 ways from Sunday, and NOTHING is working for me. I tried setting it equal to a newly allocated and initialized NSMutableArra

Answer 1

As I was proof reading my post, a thought occurred to me and I answered my own question. This resolution was obscure enough that I decided to go ahead, create the post and answer it myself (so any other newbies, like myself, won't get hung up).

My mistake was in...

@property (copy) NSMutableArray *array;

it should have been...

@property (retain) NSMutableArray *array;

The error was not happening in the way I was executing my code, but rather in the way the anObject was attempting to "copy" the NSMutableArray array.

As we all know...

mutableArray = [mutableArray copy];

is not always (or ever, in my experience) equal to...

mutableArray = [mutableArray mutableCopy];

And this was the source of my problem. By simply switching the @property from (copy) to (retain) I solved my problem.