Unrecognized selector when adding an object to NSMutableArray

Question

I have a singleton class with a NSMutableArray property to which I want to add objects and remove objects. For some reason I am getting:

-[__NSDictionaryI s         


        

Answer 1

Your

@property (nonatomic, copy) NSMutableDictionary *p_outbox;

is creating a copy of that object which you assign to it. As you are assigning a NSMutableDictionary to it, it's creates a copy of NSMutableDictionary object which is NSDictionary which is not a mutable copy.

So change it to

For Non ARC

@property (nonatomic, retain) NSMutableDictionary *p_outbox;

For ARC

@property (nonatomic, strong) NSMutableDictionary *p_outbox;