Controller.php
public function displayPartial($template = '')
    {
        if (empty($template)) {
            $template = $this->id . '\\' . $this->action;
        }

        $this->_template->display($this->_getTemplateName($template));
    }
public function displayPartial($template = '')
    {
        if (empty($template)) {
            $template = $this->id . '\\' . $this->action;
        }

        $this->_template->display($this->_getTemplateName($template));
    }
不渲染layout