nextAll()-遍历多个列表 [英] nextAll() - Multiple list traversal

问题描述

我有三个清单. 当我单击下一步"时，我想获得下一个li，这很好，但是当我到达第一个列表的末尾时，我希望下一个成为第二个列表的第一个.

I have three lists. When I click next I want to get the next li, which is fine but when I reach the end of the first list I would like the next to be the first of the second list.. I'll try and explain a little better.

<ul class='list'>
   <li image_id="1"></li>
   <li image_id="2"></li>
</ul>

<ul class='list'>
   <li image_id="3"></li>
   <li image_id="4"></li>
</ul>

<ul class='list'>
   <li image_id="5"></li>
   <li image_id="6"></li>
</ul>

所以我有三个列表..接下来，我想知道我写了多少李..

So I have three lists.. next I want to know how many li's I have so I wrote..

var how_many $('ul.list li').length;

这很好，它带回了所有6 li的食物.

this is good, it's bringing back all 6 li's..

接下来，我想找到一个li，如果它当前具有图像ID im.

next I want to find a li if it has the image id im currently on.

var which = $('ul.list li[image_id^="' +  image_id +'"]');

目前一切正常.

所以现在我要查找下一个李的图像ID是什么.

so now Im going to find what the next li's image id is..

var found_next = which.nextAll('ul.list li').attr('image_id');

这也可以.

然后，我使用.load加载新图像，该.load具有用于更新当前image_id的回调...

I then load the new image in using a .load that has a callback that updates the current image_id...

问题"是单击时，单击下一个..next..next等，然后说到第一个列表jquery会带回"undefined"，而不是第二个列表的第一个li.有人有任何建议吗?

The "PROBLEM" is when click, next..next..next etc and I get to the end of say the first list jquery brings back "undefined" not the first li of the second list. has anyone got any suggestions?

任何帮助将不胜感激.

推荐答案

.nextAll 仅适用为兄弟姐妹.如果要跳到下一个<li>，则必须选择所有元素，然后使用 .index 和 .eq() 来选择下一个<li>.

.nextAll only works for siblings. If you want to jump to the next <li>, you have to select all elements, and use .index and .eq() to select the next <li>.

var $li = $('ul.list li');
// Example, inside an event listener:
    var index = $(this).index($li);
    var nextElement = $li.eq( index + 1 );

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