preDispatch不起作用

Question

我有一点问题,我有控制器扩展AbstractActionController,我需要在任何操作之前调用一些函数,例如indexAction我认为preDispatch()在任何操作之前调用但是当我在$ this-> view-> test中尝试这个代码时没有.

class TaskController extends AbstractActionController
{
 private $view;

 public function preDispatch()
 {
   $this->view->test = "test";
 }

 public function __construct()
 {
   $this->view = new ViewModel();
 }

 public function indexAction()
 {
   return $this->view;
 }
}

Answer 1

当我希望这样做时,我使用定义的onDispatch方法:

class TaskController extends AbstractActionController
{
  private $view;

  public function onDispatch( \Zend\Mvc\MvcEvent $e )
  {
    $this->view->test = "test";

    return parent::onDispatch( $e );
  }

  public function __construct()
  {
    $this->view = new ViewModel();
  }

  public function indexAction()
  {
    return $this->view;
  }
}

另外,请查看http://mwop.net/blog/2012-07-30-the-new-init.html,了解有关如何在ZF2中使用调度事件的其他信息.

Answer 2

你最好在模块类上执行此操作,并使用EventManager来处理mvc事件,如下所示:

class Module
{
  public function onBootstrap( $e )
  {
    $eventManager = $e->getApplication()->getEventManager();
    $eventManager->attach( \Zend\Mvc\MvcEvent::EVENT_DISPATCH, array($this, 'preDispatch'), 100 );
  }

  public function preDispatch()
  {
    //do something
  }
}