Create an object but change the superclass

gistfile1.txt

id objc_createInstanceOfClassWithPlatformSuperclass(Class clasz) {
    Class currentSuperclass = class_getSuperclass(clasz);
    Class originalSuperclass = objc_getClassRegisteredFirst(class_getName(currentSuperclass));
    
    const char *currentClassName = [[NSString stringWithFormat:@"__%s", class_getName(clasz)] UTF8String];
    
    // Allocate a new class par
    Class createdClass = objc_allocateClassPair(originalSuperclass, currentClassName, 0);
    
    if (createdClass == Nil) {
        // Desired class already exists. Use that shit!
        createdClass = objc_getClass(currentClassName);
    } else {
        // Copy methods
        unsigned int methodCount = 0;
        Method* methods = class_copyMethodList(clasz, &methodCount);
        
        for (int i = 0; i < methodCount; i++) {
            Method m = methods[i];
            
            SEL name = method_getName(m);
            IMP imp = method_getImplementation(m);
            const char* types = method_getTypeEncoding(m);
            class_replaceMethod(createdClass, name, imp, types);
        }
        
        if (methods)
            free(methods); // Fly free tiny memory
        
        // Register new class pair
        objc_registerClassPair(createdClass);
    }
    
    id instance = class_createInstance(clasz, 0);
    object_setClass(instance, createdClass);
    return instance;
}