Add a Form to the Block

参考网页https://stackoverflow.com/questions/36643474/how-to-create-a-form-using-block-module-in-drupal-8

个人实现的例子

/**

• @file
• Contains \Drupal\hello_world\Plugin\Block\HelloWorldBlock
  /
  namespace Drupal\hello_world\Plugin\Block;
  use Drupal\Core\Block\BlockBase;
  /*
• Provides a 'Hello' Block.
• @Block(
• id = "hello_world_block",
• admin_label = @Translation("Hello block"),
• category = @Translation("Hello World"),
• )
  */

class HelloWorldBlock extends BlockBase {
/**

• Implements \Drupal\block\BlockBase::blockBuild().
  */
  public function build() {
  $builtForm = \Drupal::formBuilder()->getForm('Drupal\hello_world\Form\FirstForm');
  $renderArray['form'] = $builtForm;
  return $renderArray;
  }
  }