从控制器调用 ViewHelper
[英]Call ViewHelper from Controller
问题描述
i`m trying to call a ViewHelper Function from within a Controller in Typo3 (to add some additional header data)
我正在尝试从 Typo3 中的控制器中调用 ViewHelper 函数（添加一些额外的标题数据）
Base is the Yag Gallery .基地是雅格画廊。
I edited the ItemListController.php and added the following:我编辑了ItemListController.php并添加了以下内容：
$pager = $this->extListContext->getPagerCollection();
$prevLinkUid = $pager->getPreviousPage();
$arg = Tx_YAG_ViewHelpers_Namespace_GPArrayViewHelper::render([page:$prevLinkUid], $pager)
$test = '<link rel="test" href="' . $arg . '">';
$this->response->addAdditionalHeaderData($test);
The addAdditionalHeaderData function works well with other data (eg $prevLinkUid , so this part is functioning well). addAdditionalHeaderData 函数可以很好地处理其他数据（例如$prevLinkUid ，所以这部分运行良好）。
If i understand the syntax of GPArrayViewHelper::render correctly, i need a pageUid as first argument and the pagerCollection as second argument (derived from this call within Resources/Private/Partials/Pager/Default.html如果我正确理解了GPArrayViewHelper::render的语法，我需要一个 pageUid 作为第一个参数和 pagerCollection 作为第二个参数（派生自Resources/Private/Partials/Pager/Default.html 中的这个调用
<extlist:link.action controller="{controller}" action="{action}" arguments="{extlist:namespace.GPArray(object:'{pagerCollection}' arguments:'page:{pager.previousPage}')}"><span><</span> </extlist:link.action>
) )
However - if i try this Controller my page won't render, so i assume there is something wrong with the php code / function call, maybe even the syntax of the key value pair/first argument?但是 - 如果我尝试这个控制器，我的页面将不会呈现，所以我认为 php 代码/函数调用有问题，甚至键值对/第一个参数的语法都有问题？ Sorry, i'm not a professional in php抱歉，我不是 php 专业人士
Any ideas how can i achieve this?任何想法我怎么能做到这一点？ I read that it may be difficult to use ViewHelpers from within other controllers?我读到在其他控制器中使用 ViewHelpers 可能很困难？
3 个解决方案
解决方案1
0 2017-10-13 07:32:58
Viewhelpers are not supposed to be used outside of Fluid templates.不应在 Fluid 模板之外使用 Viewhelper。
However, there might be an easier way to achieve what you want, eg with HeaderAssets .但是，可能有更简单的方法来实现您想要的，例如使用HeaderAssets 。 This way you can easily add snippets to the <head> of your page from within a controller action or page template.通过这种方式，您可以轻松地从控制器操作或页面模板中将代码段添加到页面的<head> 。
解决方案2
0 2017-10-13 07:47:38
Please really don't to that.请不要那样做。 What you can do is using the PageRenderer .您可以做的是使用PageRenderer 。 Eg using例如使用
$pageRenderer = GeneralUtility::makeInstance(PageRenderer::class);
$pageRenderer->addHeaderData($headerData);
解决方案3
0 2021-01-29 06:53:55
there is a ViewHelperInvoker class which you can use to render a viewhelper in a controller:有一个 ViewHelperInvoker 类，您可以使用它在控制器中呈现一个视图助手：
$viewHelperInvoker = GeneralUtility::makeInstance(\TYPO3Fluid\Fluid\Core\ViewHelper\ViewHelperInvoker::class);
$result = $viewHelperInvoker->invoke(
\TYPO3\CMS\Fluid\ViewHelpers\Format\CurrencyViewHelper::class,
[ 'currencySign' => '€' ],
new \TYPO3\CMS\Fluid\Core\Rendering\RenderingContext(),
function() {
return 12345.67;
}
);
https://github.com/TYPO3/Fluid/blob/master/src/Core/ViewHelper/ViewHelperInvoker.php https://github.com/TYPO3/Fluid/blob/master/src/Core/ViewHelper/ViewHelperInvoker.php
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.