PhalconException: Service 'view' wasn't found in the dependency injection container

[yakczh]

用Phalcon做服务器接口，只输出json，把输出模板的路径配置
$di->set('view', function(){
$view = new \Phalcon\Mvc\View();
$view->setViewsDir('../app/views/');
return $view;
});
注释掉　提示　
PhalconException: Service 'view' wasn't found in the dependency injection container
如果不输出模板，只是输出json_encode($data) 呢？