我已经设法做到了：
public function renderElement($element) {
// FORM ROW
$html = '<div class="form-group">';
// LABEL
$html .= '<label class="form-label" for="' . $element->getAttribute('id') . '">' . $element->getLabel() . '</label>';
// ELEMENT
/*
- Check if element has error messages
- If it does, add my error-class to the element's existing one(s),
to style the element differently on error
*/
if (count($element->getMessages()) > 0) {
$classAttribute = ($element->hasAttribute('class') ? $element->getAttribute('class') . ' ' : '');
$classAttribute .= 'input-error';
/*
* Normally, here I would have added a space in my string (' input-error')
* Logically, I would figure that if the element already has a class "cls"
* and I would do $element->getAttribute('class') . 'another-class'
* then the class attribute would become "clsanother-class"
* BUT it seems that, even if I don't intentionally add a space in my string,
* I still get "cls another-class" as the resulted concatenated string
* I assume that when building the form, ZF2 automatically
* adds spaces after attributes values? so you/it won't have to
* consider that later, when you'd eventually need to add another
* value to an attribute?
*/
$element->setAttribute('class', $classAttribute);
}
$html .= $this->view->formElement($element);
/*
* Of course, you could decide/need to do things differently,
* depending on the element's type
switch ($element->getAttribute('type')) {
case 'text':
case 'email': {
break;
}
default: {
}
}
*/
// ERROR MESSAGES
// Custom class (.form-validation-error) for the default html wrapper - <ul>
$html .= $this->view->FormElementErrors($element, array('class' => 'form-validation-error'));
$html .= '</div>'; # /.form-group
$html .= '<div class="clearfix" style="height: 15px;"></div>';
return $html . PHP_EOL;
}
我不喜欢这个，但我想没有更短的方法。我认为 ZF2 应该有这样的东西：
if ($element->hasErrors()) { $element->addClass('some-class'); }
开箱即用。这就是我所期望的答案，它只是我错过/找不到的一种方法。但事实证明，ZF2 在整个世界中并没有您开箱即用可能需要的任何东西，您最终不得不（或多或少）编写偶尔的助手。
无论如何，如果有人需要它，这里是整个 RenderForm 视图助手：
namespace User\View\Helper;
use Zend\View\Helper\AbstractHelper;
class RenderForm extends AbstractHelper {
public function __invoke($form) {
$form->prepare();
$html = $this->view->form()->openTag($form) . PHP_EOL;
$html .= $this->renderFieldsets($form->getFieldsets());
$html .= $this->renderElements($form->getElements());
$html .= $this->view->form()->closeTag($form) . PHP_EOL;
return $html;
}
public function renderFieldsets($fieldsets) {
foreach ($fieldsets as $fieldset) {
if (count($fieldset->getFieldsets()) > 0) {
$html = $this->renderFieldsets($fieldset->getFieldsets());
} else {
$html = '<fieldset>';
// You can use fieldset's name for the legend (if that's not inappropriate)
$html .= '<legend>' . ucfirst($fieldset->getName()) . '</legend>';
// or it's label (if you had set one)
// $html .= '<legend>' . ucfirst($fieldset->getLabel()) . '</legend>';
$html .= $this->renderElements($fieldset->getElements());
$html .= '</fieldset>';
// I actually never use the <fieldset> html tag.
// Feel free to use anything you like, if you do have to
// make grouping certain elements stand out to the user
}
}
return $html;
}
public function renderElements($elements) {
$html = '';
foreach ($elements as $element) {
$html .= $this->renderElement($element);
}
return $html;
}
public function renderElement($element) {
// FORM ROW
$html = '<div class="form-group">';
// LABEL
$html .= '<label class="form-label" for="' . $element->getAttribute('id') . '">' . $element->getLabel() . '</label>'; # add translation here
// ELEMENT
/*
- Check if element has error messages
- If it does, add my error-class to the element's existing one(s),
to style the element differently on error
*/
if (count($element->getMessages()) > 0) {
$classAttribute = ($element->hasAttribute('class') ? $element->getAttribute('class') . ' ' : '');
$classAttribute .= 'input-error';
$element->setAttribute('class', $classAttribute);
}
$html .= $this->view->formElement($element);
// ERROR MESSAGES
$html .= $this->view->FormElementErrors($element, array('class' => 'form-validation-error'));
$html .= '</div>'; # /.row
$html .= '<div class="clearfix" style="height: 15px;"></div>';
return $html . PHP_EOL;
}
}
用户是我的模块。我在它的配置文件夹中创建了一个“viewhelper.config.php”：
return array(
'invokables' => array(
'renderForm' => 'User\View\Helper\RenderForm',
),
);
在 Module.php 中：
public function getViewHelperConfig() {
return include __DIR__ . '/config/viewhelper.config.php';
}
然后，在您看来，只需调用：
$this->renderForm($form);
当然，如果你没有很多视图助手，你不能为此创建一个单独的配置文件，留下 Module.php 并简单地添加：
'view_helpers' => array(
'invokables' => array(
'renderForm' => 'User\View\Helper\RenderForm',
),
),
到任何配置文件。