Swift Leak Playground

SwiftLeakPlayground.swift

//
//  ViewController.swift
//  Playground
//
//  Created by Tim Johnsen on 3/24/23.
//

import UIKit

class MyObject {
  var block: ((UIButton) -> Void)? = nil
  var button: UIButton? = nil
  
  func setup() {
    button = UIButton()
    block = { /*[weak self]*/ button in // Try toggling this on and off and looking for the "DEALLOCATING" log line
      button.addAction(UIAction { [weak self] _ in
        self?.doSomething()
      }, for: .touchUpInside)
    }
  }
  
  func doSomething() {
  }
  
  deinit {
    print("DEALLOCATING")
  }

}

class ViewController: UIViewController {
  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    
    let obj = MyObject()
    obj.setup()
  }
}