Material-components-ios: [TextFields] .editingChanged not fired on clear button.

[yokoe]

MDCTextField doesn't fire UIControlEvents.editingChanged when user tapped its clear button while UITextField does.

// UITextField
textField.addTarget(self, action: #selector(onTextFieldEditingChanged(_:)), for: .editingChanged)

// MDCTextField
materialTextField.addTarget(self, action: #selector(onTextFieldEditingChanged(_:)), for: .editingChanged)

@objc
func onTextFieldEditingChanged(_ textField: UITextField) {
    debugPrint(textField.text ?? "")
}

We can confirm this difference simply with the code below.

I think this behavior should be adjusted.

[iNima]

Yes it is very important to have an event for the clear button in situations where we are validating users' entry while they are typing (e.g. to Enable/Disable the login button)
Currently, we have to remove clear button in those cases which is not a solution.