How to prevent inputAccessoryView of a view controller from being shown when an alert is presented?

I have a custom UIViewController in which I have overridden inputAccessoryView to return a view as follows-

extension LoginViewController {
    override var inputAccessoryView: UIView? {
        CustomToolbar()
    }
}

The inputAccessoryView is shown when an UIAlertController is presented by the view controller.

Can anyone point out how to prevent inputAccessoryView from being shown when an alert is presented?

Copyright Notice：Content Author:「user11497206」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/60053541/how-to-prevent-inputaccessoryview-of-a-view-controller-from-being-shown-when-an