deinit

There are several resources ( blog , SO question , plus I've seen it used everywhere) that recommend removing an observer from the NotificationCenter in the deinit of the UIViewController , e.g.: deinit { NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil) NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil) } Now while according to another blog entry I don't have to care about removing an observer from NotificationCenter since it uses weak references, I've seen the same pattern used

I am exploring Swift value types particularly structs to get a better understanding of it's uses in different scenario. I was amazed to see how enum can be used to build Binary Search Tree using indirect which introduces a thin layer of reference semantics. enum BinarySearchTree<T: Comparable> { case empty case leaf(T) indirect case node(BinarySearchTree, T, BinarySearchTree) } Now coming to real question, what I am struggling to find is, what will happen to reference type inside a value type. How will the relationship work? like memory management, Object lifecycle. For e.g. class B { var data

I have a view controller that has three skscenes as children. When I transition from one to another, the old skscene doesn't get deallocated. I want it to get deallocated as if it was never there. Example: When I first load the app, only 1 skscene is visible (say it takes up 100mb memory), then I transition to another (100mb more), and then the third (300mb memory). I would end up with 300mb memory and I want to have 100 at all times. How can I achieve this? My view controller: // // ViewController.m // Paddle Jumper // // Created by Chance Daniel on 1/18/14. // Copyright (c) 2014 Max Hudson.

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 being called. What can be the reason for that? Here's the code that pushes: self.navigationController?.pushViewController(CustomViewController(), animated: true) And here's the code that pops: self.navigationController?.popViewControllerAnimated(true) I had similar problem. I added empty deinit method to my class and added breakpoint: deinit { } As result it's never called. As soon as I add some code to the body it started