How to safely removeObserver (Swift)

Question

I have added an observer

override func viewDidLoad()
{
    super.viewDidLoad()

    NSNotificationCenter.defaultCenter().addObserver(self, selector:\"selector na         


        

Answer 1

I think you should use code

NSNotificationCenter.defaultCenter().removeObserver(self)

Explain: You have mistake here: You are using NSNotification & NSNotificationCenter so you have to using this code above to remove observe. you have use code for KVO to remove observer so it will wrong.

More detail you can read at here. Key-Value-Observing

Answer 2

If you support iOS Versions by 9.0 you don't need to remove observers by yourself in your deinit method.

Taken from the documentation

In OS X 10.11 and iOS 9.0 NSNotificationCenter and NSDistributedNotificationCenter will no longer send notifications to registered observers that may be deallocated.

https://useyourloaf.com/blog/unregistering-nsnotificationcenter-observers-in-ios-9/