NSMapTableは本当に面倒いなー。C++は嫌なんやけど、この場合には std::map は良さげ。

std_map.mm

/*
  * How to use std::map instead of NSMapTable -- assuming ARC
  * Objective-C++はクレージーしすぎる件ｗ まあいいか。
  * License: Public-Domain
*/
 
 
#ifdef __cplusplus
#include <map>
#endif
 
@interface MyAwesomeController(Private) {
   @private
  #ifdef __cplusplus
    std::map<uint64_t,id> *userCacheMap;
  #else
    #warning This is no time for you, Objective-C...
    void *userCacheMap;
  #endif
  }
@end
 
 
@implementation MyAwesomeController
- (id)init {
  if ((self = [super init])) {
    userCacheMap = new std::map<uint64_t,id>;
  }
  return self;
}
 
- (MyAwesomeUserObj *) getUserFromUID: (uint64_t)uid {
  return (*userCacheMap)[uid];
}
 
- (void) setUserWithUID: (uint64_t)uid userObject: userobj {
  (*userCacheMap)[uid] = (id)userobj;
  return;
}
 
- (void) dealloc {
  delete userCacheMap;
  userCacheMap = NULL;
}
@end