title: MFMessageComposeViewController disable add recipients button
body: <p>I have a <code>MFMessageComposeViewController</code> witch i pre define its <code>body</code> and <code>recipients</code> fields.</p>
  
  <p>I want to disable the <strong>add more contact button</strong> "see the attached screen shot" because i just want the user to send this message to 1 pre defined number.</p>
  
  <p>How can accomplish that. Thanks.</p>
  
  <p><img src="https://i.stack.imgur.com/aLKjt.png" alt="MFMessageComposeViewController Screen"></p>