Deinit never called

Question

I\'m creating a ViewController object an pushing it to a navigation controller. When the object is being popped from the stack - it is not being release and Deinit is not be

Answer 1

I had the same issue when the NotificationCenter was holding a strong reference to the presented view controlled and thus it was never getting released. So I had to add [weak self] to the block like this:

(in the viewDidLoad)

NotificationCenter.default.addObserver(forName: .showFoo, object: nil, 
  queue: OperationQueue.main) { [weak self] (notification) in
    if let foo = notification.userInfo?["foo"] as? Foo {
            self?.afooButton!.setImage(UIImage(named: "foo"), for: .normal)
    }
}