title: Objective c (ios) Call method automatically to an hour each day
body: <p>good afternoon. 
  I need your support, please. 
  Should I call a method every day at a time. (9:00 PM, 9:00 PM 1:00 PM, etc) 
  This should be Automatically But, even the application is closed. 
  Have an idea? 
  I would try a NSTimer but I doubt that will work if the application is closed. </p>
  
  <p>I hope your help please! 
  THANK YOU. 
  Excuse my Inglés is not very good.</p>
  
  <p>--
  Details 
  I need to call a web service that is contained in a method from time to time. Automatically
  This is native ios</p>