如何将超棒的字体箭头图标垂直居中放置

Question

.btnup, .btndown{
    	display:inline-block;
    	font-size:20px;
    	background:#ddd;
    	border-radius:5px;
    	cursor:pointer;
    	width:25px;
    	line-height:30px;
    	height:30px;
    	color:#999;
    	text-align:center;
    	margin:0 5px;
    }

    <link href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" rel="stylesheet"/>

    <i class="fas fa-angle-up btnup" id='btnup'></i>
    <i class="fas fa-angle-down btndown" id='btndown'></i>

如何将箭头垂直居中放置？

Answer 1

您可以将FA图标放在另一个元素（该元素是灰色背景元素）中，也可以添加以下CSS属性：

        height:25px;
  padding-top: 5px;

基本上减少了高度，但使用了顶部填充来补偿高度，这将FA箭头图标向下压到灰色区域的中心。

Answer 2

您可以添加顶部和底部填充（并从height设置中减去这些值）：

.btnup, .btndown{
    	display:inline-block;
    	font-size:20px;
    	background:#ddd;
    	border-radius:5px;
    	cursor:pointer;
    	width:25px;
    	line-height:30px;
    	height:20px;
    	color:#999;
    	text-align:center;
    	margin:0 5px;
      padding: 5px 0 5px 0;
    }

<link href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" rel="stylesheet"/>

    <i class="fas fa-angle-up btnup" id='btnup'></i>
    <i class="fas fa-angle-down btndown" id='btndown'></i>

Answer 3

line-height被字体超棒的字体覆盖，添加!important以使其成为您的

.btnup,
.btndown {
  display: inline-block;
  font-size: 20px;
  background: #ddd;
  border-radius: 5px;
  cursor: pointer;
  width: 25px;
  line-height: 30px!important;
  height: 30px;
  color: #999;
  text-align: center;
  margin: 0 5px;
}

<link href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" rel="stylesheet" />

<i class="fas fa-angle-up btnup" id='btnup'></i>
<i class="fas fa-angle-down btndown" id='btndown'></i>

Answer 4

玩height和padding-top：

.btnup, .btndown{
    	display:inline-block;
    	font-size:20px;
    	background:#ddd;
    	border-radius:5px;
    	cursor:pointer;
    	width:25px;
    	line-height:10px;
      padding-top: 5px;
    	height:24px;
    	color:#999;
    	text-align:center;
    	margin:0 5px;
    }

<link href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" rel="stylesheet"/>

    <i class="fas fa-angle-up btnup" id='btnup'></i>
    <i class="fas fa-angle-down btndown" id='btndown'></i>

Answer 5

我将<span>包裹在字符周围，并使用flexbox将其放置在中心。

.btnup,
.btndown {
  display: flex;
  justify-content: center; /* Horizontal alignment */
  align-items: center; /* Vertical alignment */
  font-size: 20px;
  background: #ddd;
  border-radius: 5px;
  cursor: pointer;
  width: 25px;
  height: 30px;
  color: #999;
  margin: 5px;
}

<link href="https://use.fontawesome.com/releases/v5.3.1/css/all.css" rel="stylesheet" />

<span class="btnup"><i class="fas fa-angle-up"></i></span>
<span class="btndown"><i class="fas fa-angle-down"></i></span>