Prestashop中的管理模块控制器页面

Question

I have created the 

类AdminMyControllerNameController扩展了ModuleAdminController     {

}

but I am unable to set the template page for that please help me on this I tried the following
    public function initContent()
{
    //echo "sadsadsad";
    parent::initContent();
    $this->setTemplate('t.tpl');
}
but not worked