render()和renderStatic()有什么区别，以及在TYPO3中编写ViewHelper时应该使用什么? [英] What is the difference between render() and renderStatic() and what should be used when writing a ViewHelper in TYPO3

问题描述

有几个示例可以编写自定义ViewHelper以及不同的处理方式.我已经看到了render()和renderStatic的示例(例如，在开发自定义ViewHelper ).

There are several examples for writing a custom ViewHelper and different ways to do things. I have seen examples with render() and with renderStatic (for example in Developing a Custom ViewHelper).

在 24个流体提示中，有一个解释，但我没有不能理解它，也无法为我弄清楚为什么有2个功能以及在什么地方应使用什么功能.

In 24 Fluid Tips there is an explanation, but I don't understand it and it does not make it clear for me why there are 2 functions and what should be used where.

重大更改( Render方法参数on不赞成使用ViewHelpers )，并且各个地方的信息零散，很难在此处获得明确的答案.是开发自定义ViewHelper的示例最新的最佳做法?

Breaking changes (Render method arguments on ViewHelpers deprecated) and fragmented information in various places makes it difficult to get a clear answer here. Is the example in Developing a Custom ViewHelper up to date and best practice?

推荐答案

▸ renderStatic()
首先，renderStatic()是一种静态 PHP方法.这意味着您无权访问实例属性，例如$this->tag，例如，当ViewHelper类是AbstractTagBasedViewHelper的子类时，这是必需的.

▸ renderStatic()
First of all, renderStatic() is a static PHP method. This means, you do not have access to instance attributes, such as $this->tag, which is for example required when your ViewHelper class is a subclass of AbstractTagBasedViewHelper.

renderStatic()的另一个缺点是您无法访问子节点.在以下示例中，子节点例如是<f:then>:

Another drawback of renderStatic() is that you can not access child nodes. A child node is for example <f:then> in the following example:

<f:if condition="{variable}">
<f:then>
...
</f:then>
</f:if>

话虽如此，renderStatic()具有最佳性能，因为它是从已编译的Fluid中调用的.因此，如果可能，应使用此方法.

Having said that, renderStatic() features the best performance, because it is called from within compiled Fluid. Therefore, this method should be used if possible.

▸ render()
在某些情况下，此方法是更好的选择，或者必须用于特定的用例(请参见上面的说明). render()方法中实现的逻辑未编译，这会影响缓存的输出.

▸ render()
Under certain circumstances, this method is the better choice or has to be used for a specific use case (see explanations above). The logic implemented in a render() method is not compiled, which has an impact on output that is cached.

render()的缺点是它的性能.

▸摘要/附加说明

• 如果可以(使用)，请使用renderStatic().
• 如果实现TagBased-ViewHelper(
  的子类，请使用render() TYPO3Fluid\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper).
• 如果需要读取子节点，请使用render().
• 以Fluid(例如TYPO3 v9 LTS)随附的ViewHelper为例进行查看.
  (请参阅:typo3/sysext/fluid/Classes/ViewHelpers/*)[ GitHub ]

• Use renderStatic(), if you can (performance).
• Use render(), if you implement an TagBased-ViewHelper (subclass of
  TYPO3Fluid\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper).
• Use render(), if you need to read child nodes.
• Review the ViewHelpers that are shipped with Fluid (e.g. TYPO3 v9 LTS) as examples.
  (see: typo3/sysext/fluid/Classes/ViewHelpers/*) [GitHub]

这篇关于render()和renderStatic()有什么区别，以及在TYPO3中编写ViewHelper时应该使用什么?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！