php - Zend Framework 2: How to mark form invalid? -

php - Zend Framework 2: How to mark form invalid? -

in zf1 possible mark form invalid using code:

$form->fieldname->adderror('error message');

how can in zf2? tried

$form->get('elementname')->setmessages(array('error message'));

but doesn't create form invalid.

php zend-framework2 zend-form2