How to remove NotificationCenter observer in Swift

Use the method deinit. In Objective-C classes I would always remove NSNotificationCenter observers in the -dealloc method, but a Swift class doesn't have a -dealloc method. Instead, Swift has a deinit method.

Here is an example of Objective-C:

@implementation MyClass
  - (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
  }
@end

And the equivilant in Swift:

class MyClass {
  deinit {
    NotificationCenter.default.removeObserver(self)
  }
}

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