如果不使用 MFMessageComposeViewController，您将无法发送 SMS.如果你想发送短信，那么你必须使用 MFMessageComposeViewController.否则，您可以使用服务器使用短信.首先，您需要向服务器发送消息，然后服务器将向任意号码发送消息.您也可以使用短信网关发送短信.

You can not send SMS without the use of MFMessageComposeViewController. if you want to send SMS, then you have to use MFMessageComposeViewController. Otherwise, you can use server to use SMS. First you need to send message to server and then server will send message to any number. You can also use SMS gateway for sending SMS.