这是一个伟大的文章如何垂直对齐.. 我喜欢漂浮式。

http://www.vanseodesign.com/css/vertical-centering/

HTML:

<div id="main">
    <div id="floater"></div>
    <div id="inner">Content here</div>
</div>

以及相应的风格:

#main {
   height: 250px;
}

#floater {
   float: left;
   height: 50%;
   width: 100%;
   margin-bottom: -50px;
}

#inner {
   clear: both;
   height: 100px;
}

这是一个现代的方法，它利用CSS Flexbox功能。 现在，只需将这些样式添加到.main容器中，就可以垂直对齐父容器中的内容

.main {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center; // To center align it horizontally as well
}

你也可以使用CSS网格(一个二维网格布局系统)。

.main {
  display: grid;
  justify-content: center;
  align-content: center;
}

下面是一个简写方法，但浏览器的支持仍然很低- https://caniuse.com/?search=place-items。

    .main {
      display: grid; // flex  -  works for both
      place-items: center;
    }

你就可以开始了!

你应该把垂直对齐:中间放在内部元素，而不是外部元素。在外部元素上设置line-height属性以匹配外部元素的高度。然后在内部元素上设置display: inline-block和line-height: normal。通过这样做，内部元素上的文本将以正常的行高换行。支持Chrome, Firefox, Safari和IE 8+

.main { 身高:72 px; 行高:72 px; 边框:1px纯黑色; ｝ 在{ 显示:inline-block; vertical-align:中间; 行高:正常; ｝ < div class = "主" > <div class="inner">垂直居中的文本</div> < / div >

小提琴

这里是最新的最简单的解决方案-不需要改变任何东西，只需添加三行CSS规则到您的div的容器中，您希望居中。我爱FlexBox #爱Flex xbox

.main { /* I changed height to 200px to make it easy to see the alignment. */ height: 200px; vertical-align: middle; border: 1px solid #000000; padding: 2px; /* Just add the following three rules to the container of which you want to center at. */ display: flex; flex-direction: column; justify-content: center; /* This is true vertical center, no math needed. */ } .inner { border: 1px solid #000000; } .second { border: 1px solid #000000; } <div class="main"> <div class="inner">This box should be centered in the larger box <div class="second">Another box in here</div> </div> <div class="inner">This box should be centered in the larger box <div class="second">Another box in here</div> </div> </div>

奖金

justify-content值可以设置为以下几个选项:

flex-start, which will align the child div to where the flex flow starts in its parent container. In this case, it will stay on top. center, which will align the child div to the center of its parent container. This is really neat, because you don't need to add an additional div to wrap around all children to put the wrapper in a parent container to center the children. Because of that, this is the true vertical center (in the column flex-direction. similarly, if you change the flow-direction to row, it will become horizontally centered. flex-end, which will align the child div to where the flex flow ends in its parent container. In this case, it will move to bottom. space-between, which will spread all children from the beginning of the flow to the end of the flow. If the demo, I added another child div, to show they are spread out. space-around, similar to space-between, but with half of the space in the beginning and end of the flow.

这就是答案:

垂直对齐使元素相对于元素所在行的尺寸进行对齐。

参考:https://christopheraue.net/design/why-vertical-align-is-not-working

这是一个伟大的文章如何垂直对齐.. 我喜欢漂浮式。

http://www.vanseodesign.com/css/vertical-centering/

HTML:

<div id="main">
    <div id="floater"></div>
    <div id="inner">Content here</div>
</div>

以及相应的风格:

#main {
   height: 250px;
}

#floater {
   float: left;
   height: 50%;
   width: 100%;
   margin-bottom: -50px;
}

#inner {
   clear: both;
   height: 100px;
}