Question

I’m looking for a better way to do this:

id key, value;
NSMutableDictionary dict;
[dict setObject:value forKey:[NSNumber numberWithInt:(int)key]]

That is, use an NSDictionary to map from address to object.

Answer 1

Use CFDictionary/CFMutableDictionary.

Keys for a CFDictionary may be of any C type.

const void * CFDictionaryGetValue (
   CFDictionaryRef theDict,
   const void *key
);

You’ll need to #import <CoreFoundation/CoreFoundation.h> and possibly add the CoreFoundation framework to your project.

When creating the dictionary, specify NULL for the key and value callback structures to indicate you don’t want them to be retained.