Magento 2-将存储变量从布局XML文件传递到块

<block class="Vendor\Module\Block\CustomBlock" name="custom.block" template="Vendor_Module::custom_block.phtml">
    <arguments>
        <argument name="custom_variable" xsi:type="string">Custom Value</argument>
    </arguments>
</block>

namespace Vendor\Module\Block;

use Magento\Framework\View\Element\Template;

class CustomBlock extends Template
{
    protected $customVariable;

    public function __construct(
        Template\Context $context,
        array $data = [],
        $customVariable = null
    ) {
        parent::__construct($context, $data);
        $this->customVariable = $customVariable;
    }

    public function getCustomVariable()
    {
        return $this->customVariable;
    }
}

<?php echo $block->getCustomVariable(); ?>