title: Adding delay in sending SMS in iOS
body: <p>I am developing an application that sends SMS to the selected contacts at regular intervals for a specified number of times. I have the SMS-sending functionality working, but I need to add a delay between sending SMS after each round.</p>
  
  <p>For example, if I want a message M to be sent to S and D in my contacts, I need the app to wait for N seconds before sending the same message again to S and D. </p>
  
  <p>How can I get this working? How do I add the delay function between sending the messages to the contacts?</p>
  
  <p>Thanks in advance!</p>