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我试图了解导航栏是如何在 magento 中形成的流程,并在 topmenu.phtml 中遇到了我无法弄清楚的这一行。

<?php $_menu = $this->getHtml('level-top') ?>

我知道如何调用子块,但是“顶级”在哪里?似乎是一个特殊的关键词。谁能解释这个定义在哪里以及它是如何与顶部导航相关联的?

提前致谢。

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1 回答 1

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是的,这有点奇怪,但归结为以下几点:

该调用$this->getHtml('level-top')引用块类Mage_Page_Block_Html_Topmenu$this是该类的一个实例),其中包含方法:

public function getHtml($outermostClass = '', $childrenWrapClass = '')
{
    Mage::dispatchEvent('page_block_html_topmenu_gethtml_before', array(
        'menu' => $this->_menu,
        'block' => $this
    ));

    $this->_menu->setOutermostClass($outermostClass);
    $this->_menu->setChildrenWrapClass($childrenWrapClass);

    if ($renderer = $this->getChild('catalog.topnav.renderer')) {
        $renderer->setMenuTree($this->_menu)->setChildrenWrapClass($childrenWrapClass);
        $html = $renderer->toHtml();
    } else {
        $html = $this->_getHtml($this->_menu, $childrenWrapClass);
    }

    Mage::dispatchEvent('page_block_html_topmenu_gethtml_after', array(
        'menu' => $this->_menu,
        'html' => $html
    ));

    return $html;
}

-->$outermostClass持有价值top-level

从那里您可以看到对$renderer->toHtml()where$renderer实例的调用Mage_Page_Block_Html_Topmenu_Renderer

protected function _toHtml()
{
    $this->_addCacheTags();
    $menuTree = $this->getMenuTree();
    $childrenWrapClass = $this->getChildrenWrapClass();
    if (!$this->getTemplate() || is_null($menuTree) || is_null($childrenWrapClass)) {
        throw new Exception("Top-menu renderer isn't fully configured.");
    }

    $includeFilePath = realpath(Mage::getBaseDir('design') . DS . $this->getTemplateFile());
    if (strpos($includeFilePath, realpath(Mage::getBaseDir('design'))) === 0 || $this->_getAllowSymlinks()) {
        $this->_templateFile = $includeFilePath;
    } else {
        throw new Exception('Not valid template file:' . $this->_templateFile);
    }
    return $this->render($menuTree, $childrenWrapClass);
}

在我的情况下,此方法现在将模板文件加载到$includeFilePath变量中/vagrant/app/design/frontend/rwd/default/template/page/html/topmenu/renderer.phtml(取决于您使用的主题)。

我无法发现$outermostClassvalue的任何用途top-level

于 2016-05-10T19:58:56.900 回答