class MultiJson::Adapters::Nsjsonserialization

def dump(object, options = {})
  pretty = options[:pretty] ? NSJSONWritingPrettyPrinted : 0
  object = object.as_json if object.respond_to?(:as_json)
  if NSJSONSerialization.isValidJSONObject(object)
    data = NSJSONSerialization.dataWithJSONObject(object, :options => pretty, :error => nil)
    NSMutableString.alloc.initWithData(data, :encoding => NSUTF8StringEncoding)
  else
    super(object, options)
  end
end

def load(string, options = {})
  data = string.dataUsingEncoding(NSUTF8StringEncoding)
  object = NSJSONSerialization.JSONObjectWithData(data, :options => NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves, :error => nil)
  if object
    object = symbolize_keys(object) if options[:symbolize_keys]
    object
  else
    super(string, options)
  end
end