我试图有multi level menu
通过JSON data
,以下是我的JSON
格式数据:
{"pages": [
{"pagelink": "index.html", "pagename": "Mysite", "submenu": [
{"pagelink": "#", "pagename": "sublevel1", "submenu": "NULL"},
{"pagelink": "#", "pagename": "submenu2", "submenu": [
{"pagelink": "#", "pagename": "sublevel2", "submenu": "NULL"}
]
}
]
},
{"pagelink": "templates.html", "pagename": "Templates", "submenu": "NULL"},
{"pagelink": "aboutus.html", "pagename": "About Us", "submenu": "NULL"},
{"pagelink": "contactus.html", "pagename": "Contact Us", "submenu": "NULL"}
]
}
当我没有sub menu
字段时,我习惯通过以下方式调用菜单:
<nav id="nav">
<ul id="main-nav" class="hidden-mobile">
@foreach($contents->pages as $pages)
<li class="menu-item-has-children">
<a href="{{ $pages->pagelink }}">{{ $pages->pagename }}</a>
</li>
@endforeach
</ul>
</nav>
当我添加子菜单时,我尝试使用以下代码:
<nav id="nav">
<ul id="main-nav" class="hidden-mobile">
@foreach($contents->pages as $pages)
<li class="menu-item-has-children">
<a href="{{ $pages->pagelink }}">{{ $pages->pagename }}</a>
@if(isset($contents->pages->submenu))
<ul class="sub-nav">
@foreach($contents->pages->submenu as $submenu)
<li><a href="{{ $submenu->pagelink }}">{{ $submenu->pagename }}</a> </li>
@endforeach
</ul>
@endif
</li>
@endforeach
</ul>
</nav>
但是没有成功。
请指导我,我是否需要更改JSON data
格式,或者blade
文件本身是否有任何出路。
您必须调用$pages
,而不是$contents->pages
@if(isset($pages->submenu))
<ul class="sub-nav">
@foreach($pages->submenu as $submenu)
<li><a href="{{ $submenu->pagelink }}">{{ $submenu->pagename }}</a> </li>
@endforeach
</ul>
@endif
如果您想创建多维JSON,并且您不知道将有多少嵌套数组,则必须为子菜单
创建额外的刀片。<ul class="sub-nav">
@foreach($pages as $submenu)
<li>
<a href="{{ $submenu->pagelink }}">{{ $submenu->pagename }}</a>
@if (isset($submenu->submenu))
@include('submenu', ['pages' => $submenu->submenu])
@endif
</li>
@endforeach
</ul>
然后你的菜单栏看起来像:
<nav id="nav">
<ul id="main-nav" class="hidden-mobile">
@foreach($contents->pages as $pages)
<li class="menu-item-has-children">
<a href="{{ $pages->pagelink }}">{{ $pages->pagename }}</a>
@if(isset($pages->submenu))
@include('submenu', ['pages' => $pages->submenu])
@endif
</li>
@endforeach
</ul>
</nav>
这个解决方案应该工作,如果你将删除"submenu": "NULL"
。如果不是,则必须额外检查元素submenu
是否在所有条件下都是数组。