关于css中的align-content属性详解

align-content

作用:

会设置自由盒内部各个项目在垂直方向排列方式。

条件:
必须对父元素设置自由盒属性display:flex;，并且设置排列方式为横向排列flex-direction:row;并且设置换行，flex-wrap:wrap;这样这个属性的设置才会起作用。
设置对象:

这个属性是对她容器内部的项目起作用，对父元素进行设置。

取值:
stretch:默认设置，会拉伸容器内每个项目占用的空间，填充方式为给每个项目下方增加空白。第一个项目默认从容器顶端开始排列。

<span style="color: #800000;">html>


<meta charset="UTF-8">
<title>
Align-content
</title>
<style>

#father</style></span>{<span style="color: #ff0000;">
    
    width</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;">flex</span>;<span style="color: #ff0000;">
    flex-direction</span>:<span style="color: #0000ff;">row</span>;<span style="color: #ff0000;">
    flex-wrap</span>:<span style="color: #0000ff;">wrap</span>;<span style="color: #ff0000;">
    align-content</span>:<span style="color: #0000ff;">strech</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">grey</span>;
}<span style="color: #800000;">
.son1</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">orange</span>;
}<span style="color: #800000;">

.son2</span>{<span style="color: #ff0000;">
    
    height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">red</span>;
}<span style="color: #800000;">

.son3</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">#08a9b5</span>;
}<span style="color: #800000;">






<div id="father">

<div class="son1">
q
</div>

<div class="son2">
w
</div>

<div class="son3">
e
</div>
<div class="son3">
e
</div>
<div class="son3">
e
</div>



</div>


</span>

 

Center:这个会取消项目之间的空白并把所有项目垂直居中。

<span style="color: #800000;">html>


<meta charset="UTF-8">
<title>
关于文档元素测试
</title>
<style>

#father</style></span>{<span style="color: #ff0000;">
    
    width</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;">flex</span>;<span style="color: #ff0000;">
    flex-direction</span>:<span style="color: #0000ff;">row</span>;<span style="color: #ff0000;">
    flex-wrap</span>:<span style="color: #0000ff;">wrap</span>;<span style="color: #ff0000;">
    align-content</span>:<span style="color: #0000ff;">center</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">grey</span>;
}<span style="color: #800000;">
.son1</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">orange</span>;
}<span style="color: #800000;">

.son2</span>{<span style="color: #ff0000;">
    
    height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">red</span>;
}<span style="color: #800000;">

.son3</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">#08a9b5</span>;
}<span style="color: #800000;">


.son4</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">#9ad1c3</span>;
}<span style="color: #800000;">

.son5</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">rgb(21,123,126)</span>;
}<span style="color: #800000;">




<div id="father">

<div class="son1">
q
</div>

<div class="son2">
w
</div>

<div class="son3">
e
</div>
<div class="son4">
e
</div>
<div class="son5">
e
</div>



</div>


</span>

Flex-start:这个会取消项目之间的空白，并把项目放在容器顶部。

<span style="color: #800000;">html>


<meta charset="UTF-8">
<title>
关于文档元素测试
</title>
<style>

#father</style></span>{<span style="color: #ff0000;">
    
    width</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;">flex</span>;<span style="color: #ff0000;">
    flex-direction</span>:<span style="color: #0000ff;">row</span>;<span style="color: #ff0000;">
    flex-wrap</span>:<span style="color: #0000ff;">wrap</span>;<span style="color: #ff0000;">
    align-content</span>:<span style="color: #0000ff;">flex-start</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;">200px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">grey</span>;
}<span style="color: #800000;">
.son1</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">orange</span>;
}<span style="color: #800000;">

.son2</span>{<span style="color: #ff0000;">
    
    height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">red</span>;
}<span style="color: #800000;">

.son3</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">#08a9b5</span>;
}<span style="color: #800000;">


.son4</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">#9ad1c3</span>;
}<span style="color: #800000;">

.son5</span>{<span style="color: #ff0000;">
    
      height</span>:<span style="color: #0000ff;">30px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;">100px</span>;<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;">rgb(21,123,126)</span>;
}<span style="color: #800000;">




<div id="father">

<div class="son1">
q
</div>

<div class="son2">
w
</div>

<div class="son3">
e
</div>
<div class="son4">
e
</div>
<div class="son5">
e
</div>



</div>


</span>

flex-end:这个会取消项目之间的空白并把项目放在容器底部。

align-content:flex-end;

space-between这个会使项目在垂直方向两端对齐。即上面的项目对齐容器顶部，最下面一个项目对齐容器底部。留相同间隔在每个项目之间。

align-content:space-between;

Space-around:这个会使每个项目上下位置保留相同长度空白，使得项目之间的空白为两倍的单个项目空白。

align-content:space-around;

Inherit:使得元素的这个属性继承自它的父元素。
innitial:使元素这个属性为默认初始值。