NSMutableArray addObject not working

Question

I have declared an NSMutableArray *categories in my view controller .h file, and declared a property for it.

In the parser:foundCharacters:

Answer 1

Initialize an empty array using

categories = [NSMutableArray array];

The array class method are autoreleased so no need to release.

Answer 2

The "0x0" part is a memory address. Specifically, "nil", which means your mutable array doesn't exist at the time this is being called. Try creating it in your -init method:

categories = [[NSMutableArray alloc] init];

Don't forget to release it in your -dealloc.