NSNotificationCenter addObserver in Swift

Question

How do you add an observer in Swift to the default notification center? I\'m trying to port this line of code that sends a notification when the battery level changes.

Answer 1

We should remove notification also.

Ex.

deinit 
{
  NotificationCenter.default.removeObserver(self, name:NSNotification.Name(rawValue: "notify"), object: nil)

}