从控制器任务 Joomla 调用视图方法

我正在尝试通过MVC创建Joomla2.5组件。我想将控制器定向到视图中定义的 mydisplay（） 方法.xml.php从 task=jump 进入入口点。谢谢。

/ROOT/components/com_api/views/api/view.xml.php

<?php
defined('_JEXEC') or die('Restricted access');
// import Joomla view library
jimport('joomla.application.component.view');
/**
 * XML View class for the Api Component
 */
class ApiViewApi extends JView
{
// Overwriting JView display method
function mydisplay($tpl = null)
{
//echo JRequest::getVar('task');
    //$this->get('Ister');
    // Assign data to the view
    $this->msg = $this->get('xCredentials');
    // Check for errors.
    if (count($errors = $this->get('Errors')))
    {
        JError::raiseError(500, implode('<br />', $errors));
        return false;
    }
    // Display the view
    parent::display($tpl);
}

}
?>

根/组件/com_api/api.php（入口点控制器）

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
// import joomla controller library
jimport('joomla.application.component.controller');
// Get an instance of the controller prefixed by Api
$controller = JController::getInstance('Api');

// Perform the Request task
$controller->execute(JRequest::getCmd('task'));
$controller->redirect();
?>

根/组件/com_api/控制器.php（带任务=跳转的控制器）

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
// import Joomla controller library
jimport('joomla.application.component.controller');
/**
 * Api Component Controller
 */
class ApiController extends JController
{
function jump()
  {
    //parent::display();

/* invoke mydisplay method from view.xml.php, located in views*/
  }
}

如何在视图中调用 mydisplay（） 方法.xml.php 执行任务=跳转后？