Php 在主页中获取客户ID-Magento 2

我需要在主页中获取主要客户ID，但没有会话界面来提供此信息

我试过这些论文：

\Magento\Backend\Model\Session
\Magento\Catalog\Model\Session
\Magento\Checkout\Model\Session
\Magento\Customer\Model\Session
\Magento\Newsletter\Model\Session

---

存在一个界面，用于在每个页面上提供客户ID，如下图所示

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();  
$customerSession = $objectManager->get('Magento\Customer\Model\Session');  
$customerId = $customerSession->getCustomer()->getId(); // get the customer Id

---

名称空间供应商\模块\块

类窗体扩展\Magento\Framework\View\Element\Template

    protected $customerSession;

    /**
     * Construct
     *
     * @param \Magento\Framework\View\Element\Template\Context $context
     * @param \Magento\Customer\Model\Session $customerSession
     * @param array $data
     */
    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Customer\Model\Session $customerSession,
        array $data = []
    ) {
        parent::__construct($context, $data);

        $this->customerSession = $customerSession;
    }

    public function _prepareLayout()
    {

        var_dump($this->customerSession->getCustomer()->getId());
        exit();
        return parent::_prepareLayout();
    }