Require textfield value about pmalertcontroller HOT 3 CLOSED

let textField = TextField(frame: CGRect(x: 0, y: 0, width: 230, height: 40))
textField.placeholder = "Enter your email address"
textField.backgroundColor = ColorCompatibility.lightBackground
textField.layer.cornerRadius = 8
textField.font = UIFont.systemFont(ofSize: 15)
textField.keyboardType = UIKeyboardType.emailAddress
textField.autocapitalizationType = .none
textField.accessibilityIdentifier = "forgotPasswordInput"
textField.addTarget(self, action: #selector(self.alertTextFieldDidChange(field:)), for: UIControl.Event.editingChanged)
alert.alertContentStackView.addArrangedSubview(textField)

let submitAction = PMAlertAction(title: "Submit", style: .default, action: {() in }
submitAction.tag = 0xAC
submitAction.isEnabled = false

@objc func alertTextFieldDidChange(field: UITextField){
        let alertController: PMAlertController = self.presentedViewController as! PMAlertController
        if let submitAction = alertController.view.viewWithTag(0xAC) as? UIButton {
            submitAction.isEnabled = (field.text?.isEmail)
        }
    }