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Does the following remove all NSNotificationCenter.defaultCenter there were added by name a view?
NotificationCenter.default.removeObserver(self) If I have the following in the same view of viewDidLoad(), will they be removed with the single line above?
NotificationCenter.default.addObserver(self, selector: Selector(("method1")), name: UITextField.textDidChangeNotification, object: nil) NotificationCenter.default.addObserver(self, selector: Selector(("method2")), name: UITextView.textDidChangeNotification, object: nil) 
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As of iOS 9 (and OS X 10.11), you don't need to remove observers yourself, if you're not using block based observers though. The system will do it for you, since it uses zeroing-weak references for observers, where it can.
Removing registered observer For Selector approach, use NotificationCenter. default. removeObserver(self, name: notificationName , object: nil) , to remove the observer. For Block based approach, save the token you obtained by registering for notification in a property.
When removing an observer, remove it with the most specific detail possible. For example, if you used a name and object to register the observer, use removeObserver:name:object: with the name and object.
Yes, the removeObserver(self) call will remove all observers that you added using addObserver:selector:name:object: with an observer of self, regardless of the notification name, object, or selector you specified.
It is a bad idea to use the removeObserver(self) method anywhere but in your object's deinit method, because some system classes (or subclasses of objects that you define) may have added observers that you don't know about. That method call is a "scorched earth" call the removes ALL observers from the object.
Instead you should call removeObserver:name:object: and remove only the observers that you added.
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