logging.h

std::ostream& operator << (std::ostream& os, NSString *string);
std::ostream& operator << (std::ostream& os, UIEdgeInsets edgeInsets);
std::ostream& operator << (std::ostream& os, CGSize size);
std::ostream& operator << (std::ostream& os, CGPoint point);
std::ostream& operator << (std::ostream& os, CGRect rect);
std::ostream& operator << (std::ostream& os, SEL selector);
std::ostream& operator << (std::ostream& os, Class cls);
std::ostream& operator << (std::ostream& os, BOOL boolean);

logging.mm

std::ostream& operator << (std::ostream& os, NSString *string)
{
    return os << [string UTF8String];
}
 
std::ostream& operator << (std::ostream& os, UIEdgeInsets edgeInsets)
{
    return os << NSStringFromUIEdgeInsets(edgeInsets);
}
 
std::ostream& operator << (std::ostream& os, CGSize size)
{
    return os << NSStringFromCGSize(size);
}
 
std::ostream& operator << (std::ostream& os, CGPoint point)
{
    return os << NSStringFromCGPoint(point);
}
 
std::ostream& operator << (std::ostream& os, CGRect rect)
{
    return os << NSStringFromCGRect(rect);
}
 
std::ostream& operator << (std::ostream& os, SEL selector)
{
    return os << NSStringFromSelector(selector);
}
 
std::ostream& operator << (std::ostream& os, Class cls)
{
    return os << NSStringFromClass(cls);
}
 
std::ostream& operator << (std::ostream& os, BOOL boolean)
{
    return os << (boolean ? true : false);
}

main.mm

#import <Foundation/Foundation.h>
#include "logging.h"
#include <iostream>
using namespace std;

int main()
{
  cout << @"Hello" << "\t" << @"World" << endl;
  return 0;
}