我有一个简单的flex-box布局的容器，如:
.grid {
display: flex;
flex-flow: row wrap;
justify-content: space-between;
}
现在我想让最后一行中的项目与其他项目对齐。justify-content:之间的空间;应使用，因为网格的宽度和高度是可以调节的。
目前看来
在这里，我希望右下角的项目在“中间一列”中。最简单的方法是什么?下面是一个展示这种行为的小jsfiddle。
.exposegrid {
display: flex;
flex-flow: row wrap;
justify-content: space-between;
}
.exposetab {
width: 100px;
height: 66px;
background-color: rgba(255, 255, 255, 0.2);
border: 1px solid rgba(0, 0, 0, 0.4);
border-radius: 5px;
box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
margin-bottom: 10px;
}
<div class="exposegrid">
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
<div class="exposetab"></div>
</div>
我发现了一个有效的解决方案，证明内容也可以居中/空间均匀/等等…(如果你知道单行中的条目数):
HTML:
<section class="container">
<div class="flex-item"></div>
<div class="flex-item"></div>
<div class="flex-item"></div>
<div class="flex-item"></div>
<div class="flex-item"></div>
<p aria-hidden="true"></p>
<p aria-hidden="true"></p>
<p aria-hidden="true"></p>
</section>
<p>标签的数量(它可以是任何其他标签)是每行中的项目数量减1。对于不同的屏幕尺寸，您可以使用媒体查询操作它。
CSS:
.container {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 20px;
}
.flex-item {
width: 300px;
height: 300px;
background: #21BA45;
}
.container > p {
width: 300px;
height: 300px;
}
你不能。Flexbox不是一个网格系统。它没有实现您所要求的功能的语言结构，至少在使用justify-content: space between时是这样。使用Flexbox最接近的方法是使用列方向，这需要设置显式的高度:
http://cssdeck.com/labs/pvsn6t4z(注:不包括前缀)
ul {
display: flex;
flex-flow: column wrap;
align-content: space-between;
height: 4em;
}
然而，只使用列会更简单，它有更好的支撑，不需要设置特定的高度:
http://cssdeck.com/labs/dwq3x6vr(注:不包括前缀)
ul {
columns: 15em;
}
这里有一些解决方案，人们建议编写精确的布局css类，使用伪元素伪造最后一项，使用非flexbox方法等。
一个大问题是邻居之间的间隙(大小写对齐的按钮包装到多行)。在这种情况下，你不希望物品相互接触，就需要有空隙。我只是想添加一个适当的解决方案，尊重差距，并适用于任何数量的项目。它也是基于假的最后一个元素的想法，但更普遍。有关详细信息，请参阅代码片段注释。
html {
font-size: 1px;
}
.container {
font-size: 16rem;
display: flex;
flex-wrap: wrap;
justify-content: space-between;
}
.item {
background-color: orange;
border-radius: 10rem;
box-sizing: border-box;
color: white;
margin-bottom: 10rem;
padding: 15rem 10rem;
text-align: center;
}
<!--
Our setup from design (example) used later in calculations:
container-width: 100%; (can be any)
max-per-row = 4;
total = 6;
desired-hor-gap = 10rem; (equal to vert. gap)
If you go dynamic (drawing html according to the coming data either in a backend template or in a frontend template), you have to calculate and then set exact properties inline.
<i> (or any real html element) is needed to set inline styles to arrange the last row properly.
"2" in <i> calc function - is 6 % 4 since calc doesn't allow for "%" operator. But in real life you will calculate these numbers in JS or some backend template anyway.
Formulas written in elements' calc functions. Seem to be self-descriptive, but the idea is to set for the last fake item the remainder width + hypothetical gaps.
-->
<div class="container">
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<div style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4);" class="item">do stuff</div>
<i style="flex: 0 1 calc((100% - (4 - 1) * 10rem) / 4 * (4 - 2) + ( 4 - 2 - 1) * 10rem);"></i>
</div>
是的。!我们可以，但与一些媒体查询和列的最大数目是预定义的。
这里我用了4列。检查我的代码:
.container {
display: flex;
display: -webkit-flex;
display: -moz-flex;
flex-flow: row wrap;
-webkit-flex-flow: row wrap;
-moz-flex-flow: row wrap;
}
.container .item {
display: flex;
display: -webkit-flex;
display: -moz-flex;
justify-content: center;
-webkit-justify-content: center;
-moz-justify-content: center;
flex-basis: 25%; //max no of columns in %, 25% = 4 Columns
}
.container .item .item-child {
width: 130px;
height: 180px;
background: red;
margin: 10px;
}
@media (max-width: 360px) {
.container .item {
flex-basis: 100%;
}
}
@media (min-width:360px) and (max-width: 520px) {
.container .item {
flex-basis: 50%;
}
}
@media (min-width:520px) and (max-width: 680px) {
.container .item {
flex-basis: 33.33%;
}
}
<div class="container">
<div class="item">
<div class="item-child">1</div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
<div class="item">
<div class="item-child"></div>
</div>
</div>
请注意
1)不需要创建子div。它可以是任何其他的标签，如'img' r任何你想要的。
2)如果你想要更多的列，调整媒体查询和最大数目。的列。
