MyFormFactory.php

<?php
class MyFormFactory extends \TYPO3\Form\Factory\AbstractFormFactory {

	public function build(array $factorySpecificConfiguration, $presetName) {
		$formConfiguration = $this->getPresetConfiguration($presetName);
		$form = new FormDefinition('myForm', $formConfiguration);

		$page1 = $form->createPage('page1');

		$actionSelect = $page1->createElement('actionSelector', 'TYPO3.Form:SingleSelectDropdown');
		$actionSelect->setProperty('options', array('action1' => 'Action 01', 'action2' => 'Action 02'));


		$redirectFinisher = new \TYPO3\Form\Finishers\RedirectFinisher();
		$redirectFinisher->setOptions(
			array(
				'Package' => 'My.Package',
				'Controller' => 'MyController',
				'action' => '{actionSelector}'
			)
		);
	}
}
?>