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Questions tagged [deinit]

Swift programming language object destructor

A deinitializer is called immediately before a class instance is deallocated. You write deinitializers with the deinit keyword, similar to how initializers are written with the init keyword. Deinitializers are only available on class types.

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Cannot Form Weak Reference To Instance Of Class - Swift Error

I am getting the error: objc[12772]: Cannot form weak reference to instance (0x137d65240) of class appName.ViewController. It is possible that this object was over-released, or is in the process of deallocation. I find this strange because this…
swiftnooby
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deinit is not being called. Help me fix this

class MyClass { func greeting() { answer += "Hello, World!" } } class Handler { var closure: (() -> Void)? let obj = MyClass() func setupClosure() { closure = { self.obj.greeting() } …
David S
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ViewController passed as parameter is not being deinitialized (Swift)

Setup: I have a ViewController ProblemView and class A. I pass ProblemView to class A, so I can work on it. It looks like this (simplified): class ProblemView: UIViewController{ var instanceOfA = A() instanceOfA.passView(passedVC:…
SanCrusher
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Deinitialization order is different when creating array differently

TL;DR: Why, when the array is created together with initial values, the values are de-initialized right away, but filling the array values after the array is created produces different behavior? I'm learning Swift after JavaScript, which has GC, so…
Parzh from Ukraine
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UIViewController initialized via UIStoryboard.instantiateViewController does not deinit during unit test when set to nil

I can't figure out why a UIViewController instantiated with UIStoryboard.instantiateViewController does not deinit when initalized in a unit test Here's the code that I expect to deinit but does not: func testDoesNotDeinit() throws { var…
wyu
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Save data to database before viewcontroller deallocated

I have a viewcontroller showing the detail of a book. What I want to do is saving data to database in a background thread before the viewcontroller is poped from the navigationcontroller. I don't know where to put the logic save data to database,…
Nhu Nguyen
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RxSwift | Initialize and push UIViewController in closure

For example we have three UIViewControllers: A, B, C. We pushing B from A. In B we calling some API: func getProduct(productNumber: String) { someService.rxGetProduct(productNumber: productNumber) .asObservable() …
Ruslan Murzatayev
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View Controllers deinitialized still memory leak

I have deinit method in all my VCs to check if they are being deinitialized or not deinit { print("\(self.description) successfully deinitialized") } When I logout, I see all my view controllers are deinitialized and my…
mutAnT
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Deinit UIViewController after adding it as a subview

I need to add a viewcontroller as a subview of mt current view, but cannot deinit after I don't need it anymore let viewController = CountrySelectViewController() viewController.view.frame = self.view.bounds …
user1620350
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Swift closure is still in memory after VC deinit is called

I have a bluetooth class which passes when a char value is updated to a closure in a view controller (as well as the same closure in a singleton class). when the VC deinit is called, the closure in the VC is still being executed when the char value…
Phil
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Swift - Deinitialize Views using conditional unwind/perform Segue with

I am using a UINavigationController within my application. And I am trying my best to manage memory allocation. All my views do have a deinit method which are called/printed whenever an unWindSegue or navigationController.popViewController() is…
TheApprentice
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Will deinit gets called when a view controller gets disappeared?

I created two view controllers like Navigation controller -> View Controller -> Details View Controller 1 2 3 The (2) View Controller has a button in it which when clicked will shows (3) Details…
John Doe
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Deinitialize presented view controller

I have the next function func switchRootViewController(rootViewController: UIViewController) { let window = UIApplication.shared.windows.first! window.rootViewController = rootViewController window.makeKeyAndVisible() } And I use it in…
Artem Krachulov
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Swift iOS -View Controller deinit runs when adding it to a new keyWindow

I have a view controller (OrangeVC) that I add to a class that contains a new keyWindow(NewKeyWindowClass). A button in a different vc is tapped and it triggers this new window to get shown over the app's main window and it animates from the right…
Lance Samaria
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View controller retaining another when changing rootViewController

I've found a memory leak in an app where the following is done: Imagine two view controllers, each of which calls a function in the appDelegate similar to this: func switchRootViewController() { let vc = getTheOtherViewController() …
Alexandre G
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