Enabling a 'save' button based on all fields in form being valid

[chriswhiteoco]

I need to enable a save button when all the fields in a form are valid.

I tried to find an example of this but couldn't.

Any suggestions or pointers to some example?

[deandreamatias]

You need use _formKey.currentState?.saveAndValidate() to validate the form and with this result, enable or disable the button.
Can implement this logic into a Viewmodel.

Currently we don't have an example with this exactly behavior