class added dynamically doesn't respond touched in swift - ios

Question

I declare TestClass contain button and textField and constraint it and then add this class to view controller
import Foundation
import UIKit
class TestClass : UIView {
let testButton : UIButton = {
let button = UIButton()
button.setTitle("Test", for: .normal)
button.setTitleColor(.red ,for:.normal)
return button
}()
let testInput : UITextField = {
let input = UITextField()
input.placeholder = "type here"
return input
}()
override init(frame: CGRect) {
super.init(frame: frame)
setupView()
}
func setupView(){
addSubview(testButton)
addSubview(testInput)
testButton.translatesAutoresizingMaskIntoConstraints = false
testInput.translatesAutoresizingMaskIntoConstraints = false
testButton.topAnchor.constraint(equalTo: self.topAnchor, constant: 20).isActive = true
testButton.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 20).isActive = true
testButton.heightAnchor.constraint(equalToConstant: 30).isActive = true
testButton.widthAnchor.constraint(equalToConstant: 50).isActive = true
testInput.topAnchor.constraint(equalTo: self.topAnchor, constant: 70).isActive = true
testInput.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 20).isActive = true
testInput.heightAnchor.constraint(equalToConstant: 30).isActive = true
testInput.widthAnchor.constraint(equalToConstant: 100).isActive = true
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
in the viewDidLoad I add this class and it appeared .
but when I tap on textField or button it doesn't respond
class ViewControll : UIViewController {
let newClass : TestClass = {
let view = TestClass()
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(newClass)
newClass.frame.size = CGSize(width: 200, height: 200)
newClass.translatesAutoresizingMaskIntoConstraints = false
newClass.topAnchor.constraint(equalTo: contView.topAnchor, constant: 300).isActive = true
newClass.leadingAnchor.constraint(equalTo: contView.leadingAnchor, constant: 30).isActive = true
newClass.testButton.addTarget(self, action: #selector(prnt), for: .touchUpInside)
}
#objc func prnt(){
print("bla bla bla")
}
}
when I click on button or tap on textField nothing happened
can anyone help me please

Answer 1

Constrains don't define height and width of your TestClass - set frame doesn't work. You need to add constraints for this as well, for example, in viewDidLoad method:
newClass.heightAnchor.constraint(equalToConstant: 200).isActive = true
newClass.widthAnchor.constraint(equalToConstant: 200).isActive = true