NSDATA+Base64 wrapper UTF8 issue

gistfile1.rb

class Base64
  def self.encode64(string)
    result = NSData.alloc.initWithData(string).base64EncodedString
    result = result.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion:true)
    NSString.alloc.initWithData(result, encoding:NSUTF8StringEncoding)
  end

  def self.decode64(string)
    data = NSData.dataFromBase64String(string)
    NSString.alloc.initWithData(data, encoding:NSUTF8StringEncoding)
  end
end

rubymotion-community/motion-cocoapods#16