我正在尝试创建一个超大菜单漫游器。不幸的是，walkers完全没有掌握我的编码知识。我真的需要一些帮助才能让它工作。以下是我需要的功能：
包裹第二层<ul> 在里面<section>. [COMPLETE]<li> 在第二级<ul>, 做那个<li> 开始一个新的<ul>. 如果是第一次<li> 在列表中，不要做任何事情，以防止形成空的无序列表。[COMPLETE]<li> 在第一个级别中，有一个子级别<ul>, 在其末尾附加一个小部件<ul>. [COMPLETE]mega-menu-columns-# 至第一级<li> 包含具有多列和/或小部件的下拉列表的元素。#表示<ul> 元素，+1表示小部件（如果存在）。[COMPLETE]我有一些代码来完成其中一些，但不是全部。以下为切口部分：
包裹第二层<ul> 在里面<section>:
function start_lvl(&$output, $depth = 0, $args = array()) {
if ($depth == 0) {
$output .= "<section>";
}
$output .= "<ul class=\\"sub-menu\\">";
}
function end_lvl(&$output, $depth = 0, $args = array()) {
$output .= "</ul>";
if ($depth == 0) {
$output .= "</section>\\n";
}
}
生成小部件HTML：
ob_start();
dynamic_sidebar("Navigation Callout");
$widget = ob_get_contents();
ob_end_clean();
输出HTML为：
<ul>
<li id="menu-item-1" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1 mega-menu-columns-2">
<a href="http://www.example.com/about/">
About Us
</a>
<section>
<ul class="sub-menu">
<li id="menu-item-2" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2">
<a href="http://www.example.com/about/company-profile/">
Company Profile
</a>
</li>
<li id="menu-item-3" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-3">
<a href="http://www.example.com/about/leadership-team/">
Leadership Team
</a>
</li>
<li id="menu-item-4" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-4">
<a href="http://www.example.com/about/professional-affiliations/">
Professional Affiliations
</a>
</li>
</ul>
<ul class="sub-menu">
<li id="menu-item-5" class="break menu-item menu-item-type-post_type menu-item-object-page menu-item-5">
<a href="http://www.example.com/about/clients/">
Clients
</a>
</li>
<li id="menu-item-6" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-6">
<a href="http://www.example.com/about/partnerships/">
Partnerships
</a>
</li>
</ul>
</section>
</li>
<li id="menu-item-7" class="widget menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-7 mega-menu-columns-3">
<a href="http://www.example.com/services/">
Services
</a>
<section>
<ul class="sub-menu">
<li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-8">
<a href="http://www.example.com/services/civil-engineering/">
Civil Engineering
</a>
</li>
<li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9">
<a href="http://www.example.com/services/land-planning/">
Land Planning
</a>
</li>
<li id="menu-item-10" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-10">
<a href="http://www.example.com/services/surveying/">
Surveying
</a>
</li>
</ul>
<ul class="sub-menu">
<li id="menu-item-11" class="break menu-item menu-item-type-post_type menu-item-object-page menu-item-11">
<a href="http://www.example.com/services/information-technology/">
Information Technology
</a>
</li>
<li id="menu-item-12" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-12">
<a href="http://www.example.com/services/subsurface-utility-engineering/">
Subsurface Utility Engineering
</a>
</li>
</ul>
<aside>
<h6>Widget Title</h6>
<p>Maecenas quis semper arcu. Quisque consequat risus nisi. Sed venenatis urna porta eros malesuada euismod. Nulla sollicitudin fringilla posuere. Nulla et tellus eu nisi sodales convallis non vel tellus.</p>
</aside>
</section>
</li>
<li id="menu-item-13" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-15">
<a href="http://www.example.com/contact/">
Contact Us
</a>
</li>
</ul>
UPDATE: 我的计数器让我很伤心。它们只在子菜单生成后才计数，这对我没有帮助。查看此屏幕截图了解我的意思：
排名靠前的数字正在增加start_el. 底部的数字正在被拉进来end_el. 正如你所见，排名靠前的数字并不包括我的.breaks 他们应该这样做。他们计算widget类，因为这些类正在计算$depth = 0. 有人请把我从这可怕的事情中救出来！
// mega menu walker
/*
ONE REMAINING BUG:
- Need to add class to LI containing mega-menu-columns-#
*/
class megaMenuWalker extends Walker_Nav_Menu {
private $column_limit = 3; /* needs to be set for each site */
private $show_widget = false;
private $column_count = 0;
static $li_count = 0;
function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
$classes = empty($item->classes) ? array() : (array) $item->classes;
$item_id = $item->ID;
if ($depth == 0) self::$li_count = 0;
if ($depth == 0 && in_array("widget", $classes)) {
$this->show_widget = true;
$this->column_count++;
}
if ($depth == 1 && self::$li_count == 1) {
$this->column_count++;
}
if ($depth == 1 && in_array("break", $classes) && self::$li_count != 1 && $this->column_count < $this->column_limit) {
$output .= "</ul><ul class=\\"sub-menu\\">";
$this->column_count++;
}
if ($depth == 0 && $this->column_count > 0) {
$mega_menu_class = " mega-menu-columns-" . $this->column_count;
}
$class_names = join(" ", apply_filters("nav_menu_css_class", array_filter($classes), $item));
$class_names = " class=\\"" . esc_attr($class_names . $mega_menu_class) . "\\"";
$output .= sprintf(
"<li id=\\"menu-item-%s\\"%s><a href=\\"%s\\">%s</a>",
$item_id,
$class_names,
$item->url,
$item->title
);
self::$li_count++;
}
function start_lvl(&$output, $depth = 0, $args = array()) {
if ($depth == 0) {
$output .= "<section>";
}
$output .= "<ul class=\\"sub-menu\\">";
}
function end_lvl(&$output, $depth = 0, $args = array()) {
$output .= "</ul>";
if ($depth == 0) {
if ($this->show_widget) {
ob_start();
dynamic_sidebar("Navigation Callout");
$widget = ob_get_contents();
ob_end_clean();
$output .= $widget;
$this->show_widget = false;
}
$output .= "</section>";
}
}
function end_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
if ($depth == 0 && $this->column_count > 0) {
/* needs to be added to opening level 0 li */
$column_count_class = " mega-menu-columns-" . $this->column_count;
$output .= $column_count_class;
/* end */
$this->column_count = 0;
}
$output .= "</li>";
}
}
UPDATE 2: 下面是一个带有注释的输出示例，说明
mega-menu-columns- 类应该计算：
<ul>
<!-- +1 because this has a class of "widget" -->
<li id="menu-item-1" class="widget menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-1 mega-menu-columns-3">
<a href="http://www.example.com/about/">
About Us
</a>
<!-- +1 because a drop down exists -->
<!-- gets added by my walker -->
<section>
<!-- end gets added by my walker -->
<ul class="sub-menu">
<!-- +0 because this "break" is the first child -->
<li id="menu-item-2" class="break menu-item menu-item-type-post_type menu-item-object-page menu-item-2">
<a href="http://www.example.com/about/company-profile/">
Company Profile
</a>
<ul>
<!-- +0 because this "break" is in level 2 -->
<li id="menu-item-3" class="break menu-item menu-item-type-post_type menu-item-object-page menu-item-3">
<a href="http://www.example.com/about/our-team/">
Our Team
</a>
</li>
</ul>
</li>
<li id="menu-item-4" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-4">
<a href="http://www.example.com/about/leadership-team/">
Leadership Team
</a>
</li>
<li id="menu-item-5" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-5">
<a href="http://www.example.com/about/professional-affiliations/">
Professional Affiliations
</a>
</li>
<!-- gets added by my walker -->
</ul>
<ul class="sub-menu">
<!-- end gets added by my walker -->
<!-- +1 because this "break" is in level 1 and not the first child -->
<li id="menu-item-6" class="break menu-item menu-item-type-post_type menu-item-object-page menu-item-6">
<a href="http://www.example.com/about/clients/">
Clients
</a>
</li>
<li id="menu-item-7" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-7">
<a href="http://www.example.com/about/partnerships/">
Partnerships
</a>
</li>
</ul>
<!-- gets added by my walker for .widget -->
<section>
<header>
<h1>Widget Title</h1>
</header>
<p>This is a widget. It was hard to make appear!</p>
</section>
<!-- end gets added by my walker for .widget -->
<!-- gets added by my walker -->
</section>
<!-- end gets added by my walker -->
</li>
</ul>
UPDATE: 这是我的最后一个助行器和功能。这正是我想要的。谢谢你的帮助！
// mega menu walker
class megaMenuWalker extends Walker_Nav_Menu {
private $column_limit = 3;
private $show_widget = false;
private $column_count = 0;
static $li_count = 0;
function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
$classes = empty($item->classes) ? array() : (array) $item->classes;
$item_id = $item->ID;
if ($depth == 0) {
self::$li_count = 0;
}
if ($depth == 0 && in_array("widget", $classes)) {
$this->show_widget = true;
$this->column_count++;
}
if ($depth == 1 && self::$li_count == 1) {
$this->column_count++;
}
if ($depth == 1 && in_array("break", $classes) && self::$li_count != 1 && $this->column_count < $this->column_limit) {
$output .= "</ul><ul class=\\"sub-menu\\">";
$this->column_count++;
}
$class_names = join(" ", apply_filters("nav_menu_css_class", array_filter($classes), $item)); // set up the classes array to be added as classes to each li
$class_names = " class=\\"" . esc_attr($class_names) . "\\"";
$output .= sprintf(
"<li id=\\"menu-item-%s\\"%s><a href=\\"%s\\">%s</a>",
$item_id,
$class_names,
$item->url,
$item->title
);
self::$li_count++;
}
function start_lvl(&$output, $depth = 0, $args = array()) {
if ($depth == 0) {
$output .= "<section>";
}
$output .= "<ul class=\\"sub-menu\\">";
}
function end_lvl(&$output, $depth = 0, $args = array()) {
$output .= "</ul>";
if ($depth == 0) {
if ($this->show_widget) {
ob_start();
dynamic_sidebar("Navigation Callout");
$widget = ob_get_contents();
ob_end_clean();
$output .= $widget;
$this->show_widget = false;
}
$output .= "</section>";
}
}
function end_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
if ($depth == 0 && $this->column_count > 0) {
$this->column_count = 0;
}
$output .= "</li>";
}
}
// add mega-menu-columns-# classes
function add_column_number($items, $args) {
static $column_limit = 3;
static $post_id = 0;
static $x_key = 0;
static $column_count = 0;
static $li_count = 0;
$tmp = array();
foreach($items as $key => $item) {
if (0 == $item->menu_item_parent) {
$x_key = $key;
$post_id = $item->ID;
$column_count = 0;
$li_count = 0;
if (in_array("widget", $item->classes, 1)) {
$column_count++;
}
}
if ($post_id == $item->menu_item_parent) {
$li_count++;
if ($column_count < $column_limit && $li_count == 1) {
$column_count++;
}
if (in_array("break", $item->classes, 1) && $li_count > 1 && $column_count < $column_limit) {
$column_count++;
}
$tmp[$x_key] = $column_count;
}
}
foreach($tmp as $key => $value) {
$items[$key]->classes[] = sprintf("mega-menu-columns-%d", $value);
}
unset($tmp);
return $items;
};
// add the column classes
add_filter("wp_nav_menu_args", function($args) {
if ($args["walker"] instanceof megaMenuWalker) {
add_filter("wp_nav_menu_objects", "add_column_number");
}
return $args;
});
// stop the column classes function
add_filter("wp_nav_menu", function( $nav_menu ) {
remove_filter("wp_nav_menu_objects", "add_column_number");
return $nav_menu;
});
