How to send sms from unity in ios platform

Hi , i want to send sms from an unity game and i found this code

     string url = string.Format("sms:{0}?body={1}", "subcode", "content" + strSend);
                     Application.OpenURL(url);

It's run well in android , but in ios it's not running or show anything , i want to ask , is there any way to send sms from unity app in ios , pls help me , i'm the newbie