如何在嵌套的 <ul> 中定位两个 <li>？

Question

我想将<li> 显示为水平线上的正方形，并在其中嵌套的正方形位于包含正方形的左下角和右下角。

____________    ____________
|          |    |          |
|___    ___|    |___    ___|
|_x_|__|_y_|    |_x_|__|_y_|   etc

我尝试将跨度添加到<li>，但无法正确定位它们。

我在嵌套的<ul> 中使用嵌套的<ul> 和两个<li>，但在顶层方块之间存在不希望的空间。

如何控制顶级<li> 之间的间距？

jsFiddle

http://jsfiddle.net/rwone/4Hzp6/

HTML

<ul class="images_list">
<li class="style_one"><img src="http://dummyimage.com/50/ccc/fff&text=1.png">
<ul class="nested"><li class="delete_span"></li><li class="crop_span"></li></ul>    
</li>
<li class="style_one"><img src="http://dummyimage.com/50/ccc/fff&text=2.png">
<ul class="nested"><li class="delete_span"></li><li class="crop_span"></li></ul>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=3.png">
<ul class="nested"><li class="delete_span"></li><li class="crop_span"></li></ul>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=4.png">
<ul class="nested"><li class="delete_span"></li><li class="crop_span"></li></ul>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=5.png">
<ul class="nested"><li class="delete_span"></li><li class="crop_span"></li></ul>
</li>
</ul>

CSS

ul.images_list {
list-style: none;
margin: 0px !important;
padding: 0px !important;
}

ul.nested {
margin: 0px !important;
padding: 0px !important;
display: inline;
position: relative;
left: -54px;
}

li.style_one {
position:relative;
display:inline-block;
/*width: 50px;
height:50px*/
}

.delete_span {
width: 15px;
height: 15px;
background: red;
display: inline-block;
}

.crop_span {
width: 15px;
height: 15px;
background: green;
display: inline-block;
position: relative;
left: 20px;
}

Answer 1

问题似乎来自user agent stylesheet（在 chrome 上）。 Chrome 正在添加一个 rules This SO question 正在谈论它。

建议添加ul { padding:0 }，但这不适用于您的情况.. 但它可能会让你找到方向。

ul, menu, dir {
  display: block;
  list-style-type: disc;
  -webkit-margin-before: 1em;
  -webkit-margin-after: 1em;
  -webkit-margin-start: 0px;
  -webkit-margin-end: 0px;
  -webkit-padding-start: 40px;//I guess this one is the problem
}

我试图通过添加!important 来覆盖此规则，但它不起作用。

Answer 2

这实现了我想要的行为，我在<li>'s 中使用了div：

http://jsfiddle.net/rwone/4Hzp6/6/

HTML

<ul class="images_list">
<li class="style_one"><img src="http://dummyimage.com/50/ccc/fff&text=1.png">
<div class="crop_it"></div><div class="delete_it"></div>
</li>
<li class="style_one"><img src="http://dummyimage.com/50/ccc/fff&text=2.png">
<div class="crop_it"></div><div class="delete_it"></div>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=3.png">
<div class="crop_it"></div><div class="delete_it"></div>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=4.png">
<div class="crop_it"></div><div class="delete_it"></div>
</li>
<li class="style_one">
<img src="http://dummyimage.com/50/ccc/fff&text=5.png">
<div class="crop_it"></div><div class="delete_it"></div>
</li>
</ul>

CSS

ul.images_list {
list-style: none;
margin: 0px !important;
padding: 0px !important;
}

li.style_one {
display: inline-block;
height: 50px;
margin-left: 15px;
position: relative;
width: 50px;
}

li.style_one:first-child {
margin-left: 0px;
}

.crop_it {
background: none repeat scroll 0 0 #FF0000;
bottom: 0;
display: inline-block;
height: 15px;
left: 0;
position: absolute;
width: 15px;
z-index: 9;
}

.delete_it {
background: none repeat scroll 0 0 #008000;
bottom: 0;
display: inline-block;
height: 15px;
left: 35px;
position: absolute;
width: 15px;
}

Answer 3

Simple just change the class ul.nested position relative to position absolute and little bit changes in left and top or copy paste the code below:

CSS CODE:

ul.images_list {
    list-style: none;
    margin: 0px !important;
    padding: 0px !important;
}

ul.nested {
    margin: 0px !important;
    padding: 0px !important;
    display: inline;
    position: absolute;
    left: 0px;
    top: 34px;
}

li.style_one {
    position:relative;
    display:inline-block;
    /*width: 50px;
    height:50px*/
}

.delete_span {
    width: 15px;
    height: 15px;
    background: red;
    display: inline-block;
}

.crop_span {
    width: 15px;
    height: 15px;
    background: green;
    display: inline-block;
    position: relative;
    left: 20px;
}