在 Block 中自定义 一个 Form

首先自定义一个 Form:

/**
 * @file
 * Contains \Drupal\resume\Form\WorkForm.
 */
namespace Drupal\resume\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
class workForm extends FormBase {
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'resume_form';
  }
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['employee_name'] = array(
      '#type' => 'textfield',
      '#title' => t('Employee Name:'),
      '#required' => TRUE,
    );
    $form['employee_mail'] = array(
      '#type' => 'email',
      '#title' => t('Email ID:'),
      '#required' => TRUE,
    );
    $form['actions']['#type'] = 'actions';
    $form['actions']['submit'] = array(
      '#type' => 'submit',
      '#value' => $this->t('Register'),
      '#button_type' => 'primary',
    );
    return $form;
  }
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    drupal_set_message($this->t('@emp_name ,Your application is being submitted!', 
array('@emp_name' => $form_state->getValue('employee_name'))));
  }
}

然后将这个 Form 添加到 Block 中：

/**
 * @file
 * Contains \Drupal\article\Plugin\Block\ArticleBlock.
 */
namespace Drupal\article\Plugin\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Form\FormInterface;
/**
 * Provides a 'article' block.
 *
 * @Block(
 *   id = "article_block",
 *   admin_label = @Translation("Article block"),
 *   category = @Translation("Custom article block example")
 * )
 */
class ArticleBlock extends BlockBase {
  /**
   * {@inheritdoc}
   */
  public function build() {
    $form = \Drupal::formBuilder()->getForm('Drupal\resume\Form\WorkForm');
    return $form;
   }
}

最后将这个 Block 添加到对于的 region 就可以了。