Prog created Buttons from class don't appear - Swift IOS - swift

Question

I'm trying to add a number of customClass buttons to my view automatically, based on the size of an array.
Created the class and called the appropriate method in the class, but nothing shows up. Debugging tells me that the method is called/executed as expected (3x).
When I add the function directly to the view controller it does work.
What am I missing here ???
ViewController code:
import UIKit
class ViewController: UIViewController {
let userArray: [String] = ["One","Two","Three"]
override func viewDidLoad() {
super.viewDidLoad()
for item in userArray {
CustomCheckBox().showNewButton()
}
}
.. Other stuff...
}
CustomButton class code:
{
import UIKit
class CustomCheckBox: UIButton {
let checkedImage: UIImage = UIImage(named:"chckbox_on")!
let uncheckedImage: UIImage = UIImage(named: "chckbox_off")!
var newButton: CustomCheckBox!
..... other functions (isChecked, buttonClicked, ..)
func showNewButton (){
newButton = CustomCheckBox (type: UIButtonType.Custom)
newButton.bounds = CGRect(x: 0, y: 0, width: 45, height: 45)
newButton.center = CGPoint(x: 40, y: 40)
newButton.addTarget(newButton, action: #selector(CustomCheckBox.buttonClicked(_:)), forControlEvents: UIControlEvents.TouchUpInside)
newButton.isChecked=false
self.addSubview(newButton)
}
}

Answer 1

May consider restructuring your code like this
class CustomCheckBoxContainer: UIView {
var newButton: CustomCheckBox!
func showNewButton (){
newButton = CustomCheckBox (type: UIButtonType.custom)
newButton.bounds = CGRect(x: 0, y: 0, width: 45, height: 45)
newButton.center = CGPoint(x: 40, y: 40)
newButton.addTarget(newButton, action: #selector(CustomCheckBox.buttonClicked(_:)), for: UIControlEvents.TouchUpInside)
newButton.isChecked=false
self.addSubview(newButton)
}
}
class CustomCheckBox: UIButton {
let checkedImage: UIImage = UIImage(named:"chckbox_on")!
let uncheckedImage: UIImage = UIImage(named: "chckbox_off")!
//add here all your button functionality
}
and then change your view did load to something like this:
override func viewDidLoad() {
super.viewDidLoad()
for item in userArray {
let customCheckBoxContainer = CustomCheckBoxContainer()
customCheckBoxContainer.showNewButton()
self.view.addSubview(customCheckBoxContainer)
}
}

Answer 2

pass your current View as parameter of your function like this.
override func viewDidLoad() {
super.viewDidLoad()
for item in userArray {
CustomCheckBox().showNewButton(self.view)
}
}
Modify your custom UIButton function newButton like this
func showNewButton (currentView : UIView){
newButton = CustomCheckBox (type: UIButtonType.Custom)
newButton.bounds = CGRect(x: 0, y: 0, width: 45, height: 45)
newButton.center = CGPoint(x: 40, y: 40)
newButton.addTarget(newButton, action: #selector(CustomCheckBox.buttonClicked(_:)), forControlEvents: UIControlEvents.TouchUpInside)
newButton.isChecked=false
currentView.addSubview(newButton)
}