Zend framework2 zf2视图策略，ViewEvent渲染器始终为空

我试图在ZF2中实现视图策略

就基本设置而言，除了ViewEvent渲染器始终为空之外，其他一切似乎都正常工作，因此渲染器永远不会被注入到策略中，TemplateResolver仍然请求模板并显示以下错误

PhpRenderer::render: Unable to render template "api/api/get"; resolver could not resolve to a file'

我甚至尝试从ZF2复制代码JsonModel和JsonStrategy，但仍然得到相同的结果。 ViewYamlStrategy.php

module.php

module.config.php

控制器

ViewYamlStrategy.php

ViewYamlRenderer.php

YamlModel.php

谢谢

我认为这是因为策略/听众被触发的顺序；一旦找到ViewRender，事件传播将停止并返回该渲染器

标准PhpRenderStrategy的默认事件优先级似乎为1，而其他JsonStrategy etc在此之前的事件优先级似乎为100

尝试更改$priority；也许101

---

我终于找到了问题所在

ViewYamlStrategy.php

---

谢谢，但不幸的是，这似乎不起作用。我认为整个问题是将YamlRenderer注入到视图事件中，因为它总是空的。

public function selectRenderer(ViewEvent $e)
{
    $renderer = $e->getRenderer(); // Always return null
}

public function getServiceConfig()
{
    return ['factories' => [
        'ViewYamlRenderer' => "Namespace\Mvc\Service\ViewYamlRendererFactory",
        'ViewYamlStrategy' => "Namespace\Mvc\Service\ViewYamlStrategyFactory",
        ],
    ];
}

'view_manager' => [
    'strategies' => [
        'ViewYamlStrategy'
    ],
],

public function getList()
{
    return new YamlModel($data);
}

function __construct(ViewYamlRenderer $renderer)
{
    $this->renderer = $renderer;
}
public function attach(EventManagerInterface $events, $priority = 1)
{
    $this->listeners[] = $events->attach(ViewEvent::EVENT_RENDERER, [$this, "selectRenderer"], $priority);
    $this->listeners[] = $events->attach(ViewEvent::EVENT_RESPONSE, [$this, "injectResponse"], $priority);
}

public function selectRenderer(ViewEvent $e)
{
    $renderer = $e->getRenderer();
    if ($this->renderer !== $renderer) {
        return;
    }
}

public function injectResponse(ViewEvent $e)
{
    $renderer = $e->getRenderer(); // Always null

    if ($this->renderer !== $renderer) {
        return;
    }
    $result = $e->getResult();
    $response = $e->getResponse();
    $response->setContent($result);
}

public function render($nameOrModel, $values = null)
{
    return $nameOrModel->serialize();
}

public function setResolver(\Zend\View\Resolver\ResolverInterface $resolver)
{
    $this->resolver = $resolver;
}

protected $captureTo = null;
protected $terminate = true;

public function serialize()
{
    /*Serialize Object and return a string*/
}

$this->listeners[] = $events->attach(
  ViewEvent::EVENT_RENDERER, 
  [$this, "selectRenderer"], 
  101 // <-- change here
); 

/* This should return a renderer */
public function selectRenderer(ViewEvent $e)
{
    // here I was checking the Renderer which was not created yet
    // and instead I should've checked the model
    $model = $e->getModel();
    if (!$model instanceof YamlModel) {
        return;
    }
    return $this->renderer;
}