系统学习magento二次开发，推荐小册：《Magento中文全栈二次开发 》

步骤在Magento 2的产品列表页面上添加额外的类别描述：

步骤1： 首先我们需要 在安装程序文件夹中创建描述属性.php文件

app\code\Vendor\Extension\Setup\Patch\Data

现在添加代码，如下所示

<?php
namespace Vendor\Extension\Setup\Patch\Data;
 
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\Patch\DataPatchInterface;
use Magento\Framework\Setup\Patch\PatchRevertableInterface;
use Magento\Store\Model\Store;
 
class DescriptionAttribute implements DataPatchInterface
{
    private $eavSetupFactory;
 
    /**
     * Constructor
     *
     * @param \Magento\Eav\Setup\EavSetupFactory $eavSetupFactory
     */
    public function __construct(EavSetupFactory $eavSetupFactory, ModuleDataSetupInterface $moduleDataSetup)
    {
       $this->eavSetupFactory = $eavSetupFactory;
       $this->setup = $moduleDataSetup;
    }
 
    /**
     * {@inheritdoc}
     */
    public function apply()
    {  
         $eavSetup = $this->eavSetupFactory->create(['setup' => $this->setup]);
 
           $eavSetup->addAttribute(
               \Magento\Catalog\Model\Category::ENTITY,
                'extra_description',
            [
                'type' => 'text',
                'label' => 'Extra Description',
                'input' => 'textarea',
                'required' => false,
                'sort_order' => 8,
                'global' => ScopedAttributeInterface::SCOPE_STORE,
                'wysiwyg_enabled' => true,
                'is_html_allowed_on_front' => true,
                'group' => 'General Information',
            ]
        );
    }
    public static function getDependencies()
    {
        return [];
    }
 
    /**
     * {@inheritdoc}
     */
    public function getAliases()
    {
        return [];
    }
 
    /**
     * {@inheritdoc}
     */
    public static function getVersion()
    {
        return '1.0.0';
    }
}

步骤2：下一步，我们需要 在view文件夹中创建category_form.xml文件

app\code\Vendor\Extension\view\adminhtml\ui_component  

并添加以下代码片段

<?xml version="1.0" ?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <fieldset name="content">
        <field name="extra_description" template="ui/form/field" sortOrder="50" formElement="wysiwyg">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="wysiwygConfigData" xsi:type="array">
                        <item name="height" xsi:type="string">100px</item>
                        <item name="add_variables" xsi:type="boolean">false</item>
                        <item name="add_widgets" xsi:type="boolean">false</item>
                        <item name="add_images" xsi:type="boolean">true</item>
                        <item name="add_directives" xsi:type="boolean">true</item>
                    </item>
                    <item name="source" xsi:type="string">category</item>
                </item>
            </argument>
            <settings>
                <label translate="true">Extra Description</label>
                <dataScope>extra_description</dataScope>
            </settings>
            <formElements>
                <wysiwyg class="Magento\Catalog\Ui\Component\Category\Form\Element\Wysiwyg">
                    <settings>
                        <rows>8</rows>
                        <wysiwyg>true</wysiwyg>
                    </settings>
                </wysiwyg>
            </formElements>
        </field>
    </fieldset>
</form>

步骤3：之后，我们需要 在以下路径中创建extra_description.phtml文件

app\code\Vendor\Extension\view\frontend\templates\product\list  

然后添加下面提到的代码

<?php if ($_bottomDescription = $block->getCurrentCategory()->getExtraDescription()): ?>
    <div class="category-extra-description">
        <?= /* @escapeNotVerified */ $this->helper('Magento\Catalog\Helper\Output')->categoryAttribute($block->getCurrentCategory(), $_bottomDescription, 'extra_description') ?>
    </div>
<?php endif; ?>

步骤4：在最后一步中，我们需要在 以下路径创建catalog_category_view.xml

app\code\Vendor\Extension\view\frontend\layout

现在添加代码，如下所示

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="2columns-left" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceContainer name="content">
            <block class="Magento\Catalog\Block\Category\View" name="extra.description" template="Vendor_Extension::product/list/extra_description.phtml" after="-"/>
        </referenceContainer>
    </body>
</page>

结论：

现在，您可以在Magento 2的产品列表页面上轻松添加有关该类别的更多信息。