使用 flex 布局防止 DIV 溢出容器答案

【问题标题】：Prevent DIV overflowing container using flex layout使用 flex 布局防止 DIV 溢出容器
【发布时间】：2015-06-11 11:55:10
【问题描述】：

我有一个使用display: flex 的相当复杂的布局。顶层是三列布局。第二级在第一列和第二列中有许多行。在这些行中的每一行中都有许多表格可供布局。

这通常都可以。但是，在中间列中，我有一个大小可以变化的 DIV - 图像中的那个大灰色框。问题是当它很高时，它可能会溢出容器的底部。我希望容器根据需要扩展到灰色 DIV 的高度。

如何做到这一点？这是代码，也是on CodePen。

html,
body,
body > div,
.column-container,
.left-column, .middle-column, .right-column 
{
  height: 100%;
}

.column-container {
  display: flex;  /* To support three column layout. */
}

.mimic-drawing {
  width: 150px;
  height: 1000px;
  background-color: lightgrey;
  border: 3px solid saddlebrown;
  border-radius: 5px;
  margin: auto;  /* Center horizontally and vertically. */
}

.wheel-container {
  align-items: flex-start; /* Lay out measurement tables at the start of the cross axis. */
  background-color: olive;
  display: flex; /* So measurement tables can be layed. */
  flex: 1 0 auto; /* Don't allow wheel containers to shrink and cause content (measurements) to be hidden.' */
}

.left-column, .right-column {
  background: lightskyblue;
  display: flex;  /* So wheel containers can be layed out. */
  flex: 1;  /* Compare to the .middle-column */
  flex-flow: column nowrap; /* Lay out wheel containers on Y axis. */
  justify-content: space-between; /* Evenly space the wheel containers. */
}

.left-column .wheel-container {
  flex-flow: row-reverse wrap;  /* Layout measurement tables right to left. */
}

.middle-column {
  background: lightcyan;
  display: flex; /* So drawing can be centralised. */
  flex: 0.5;  /* Compare to the .left-column and .right-column. */
}

.right-column .wheel-container {
  flex-flow: row wrap;   /* Layout measurement tables left to right. */
}

.wheel-number, .HBD, .BAM, .BS, .WILD, .WP {
  margin: 0.25em;
}

.HBD {
  width: 96px;
  height: 45px;
  background-color: rgb(255, 249, 229);
}

.HBD:after {
  content: 'Type Five'
}

.BAM {
  width: 80px;
  height: 30px;
  background-color: rgb(229, 240, 255);
}

.BAM:after {
  content: 'Type Four'
}

.BS {
  width: 99px;
  height: 30px;
  background-color: rgb(233, 251, 232);
}

.BS:after {
  content: 'Type One'
}

.WILD {
  width: 78px;
  height: 60px;
  background-color: rgb(230, 230, 250); 
}

.WILD:after {
  content: 'Type Two'
}

.WP {
  border: 2px solid darkred;
  width: 171px;
  height: 75px;
  background-color: rgb(255, 238, 229);
}

.WP:after {
  content: 'Type Three'
}

<div class='column-container'>
    <div class='left-column'>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>
      </div>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>         
      </div>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>           
    </div>
    <div class='middle-column'>
      <div class='mimic-drawing'>Oh dear, I overflow the bottom of my container. :-(</div>
    </div>
    <div class='right-column'>     
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>
            <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>
      <div class='wheel-container'>
          <span class='wheel-number label label-info'>n</span>
          <div class='HBD'></div>
          <div class='BAM'></div>
          <div class='BS'></div>
          <div class='WILD'></div>
          <div class='WP'></div>          
      </div>        
    </div>
</div>

【问题讨论】：

即使内容溢出也需要对齐的轮数应该相同？？？
左列中的车轮编号向右对齐，反之亦然，如图所示

标签： html css layout flexbox

【解决方案1】：

问题是你强制执行height: 100%：

html, body, body > div, .column-container,
.left-column, .middle-column, .right-column {
  height: 100%;
}

但你只想要一个最小高度，并允许它们长得更高。所以使用

html, body, body > div, .column-container,
.left-column, .middle-column, .right-column {
  min-height: 100%;
  height: auto;
}

html,
body,
body > div,
.column-container,
.left-column, .middle-column, .right-column 
{
  min-height: 100%;
}

.column-container {
  display: flex;  /* To support three column layout. */
}

.mimic-drawing {
  width: 150px;
  height: 1000px;
  background-color: lightgrey;
  border: 3px solid saddlebrown;
  border-radius: 5px;
  margin: auto;  /* Center horizontally and vertically. */
}

.wheel-container {
  align-items: flex-start; /* Lay out measurement tables at the start of the cross axis. */
  background-color: olive;
  display: flex; /* So measurement tables can be layed. */
  flex: 1 0 auto; /* Don't allow wheel containers to shrink and cause content (measurements) to be hidden.' */
}

.left-column, .right-column {
  background: lightskyblue;
  display: flex;  /* So wheel containers can be layed out. */
  flex: 1;  /* Compare to the .middle-column */
  flex-flow: column nowrap; /* Lay out wheel containers on Y axis. */
  justify-content: space-between; /* Evenly space the wheel containers. */
}

.left-column .wheel-container {
  flex-flow: row-reverse wrap;  /* Layout measurement tables right to left. */
}

.middle-column {
  background: lightcyan;
  display: flex; /* So drawing can be centralised. */
  flex: 0.5;  /* Compare to the .left-column and .right-column. */
}

.right-column .wheel-container {
  flex-flow: row wrap;   /* Layout measurement tables left to right. */
}

.wheel-number, .HBD, .BAM, .BS, .WILD, .WP {
  margin: 0.25em;
}

.HBD {
  width: 96px;
  height: 45px;
  background-color: rgb(255, 249, 229);
}

.HBD:after {
  content: 'Type Five'
}

.BAM {
  width: 80px;
  height: 30px;
  background-color: rgb(229, 240, 255);
}

.BAM:after {
  content: 'Type Four'
}

.BS {
  width: 99px;
  height: 30px;
  background-color: rgb(233, 251, 232);
}

.BS:after {
  content: 'Type One'
}

.WILD {
  width: 78px;
  height: 60px;
  background-color: rgb(230, 230, 250); 
}

.WILD:after {
  content: 'Type Two'
}

.WP {
  border: 2px solid darkred;
  width: 171px;
  height: 75px;
  background-color: rgb(255, 238, 229);
}

.WP:after {
  content: 'Type Three'
}

<div class='column-container'>
  <div class='left-column'>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>         
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>           
  </div>
  <div class='middle-column'>
    <div class='mimic-drawing'>Oh dear, I overflow the bottom of my container. :-(</div>
  </div>
  <div class='right-column'>     
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>
    <div class='wheel-container'>
      <span class='wheel-number label label-info'>n</span>
      <div class='HBD'></div>
      <div class='BAM'></div>
      <div class='BS'></div>
      <div class='WILD'></div>
      <div class='WP'></div>          
    </div>        
  </div>
</div>

【讨论】：

根据您的code，如果我增加灰色框的内容，内容会溢出jsfiddle。如果我不想那样。
@user_4337270 又是同样的问题：使用.mimic-drawing {min-height: 1000px} 而不是.mimic-drawing {height: 1000px}。