title: Switch to enable/disable local notifications (swift 4)
body: <p>I am making a Todo app and there supposed to be a switch button in inside of an application settings to enable/disable all local notifications.</p>
  
  <p>I tried removeAllPendingNotificationRequests() method, but it deletes all notifications altogether and i want to keep them scheduled but not doing anything. Is it even possible ?</p>
  
  <p>Thanks a lot</p>