html - 在 Bootstrap 中垂直居中所有表格行元素
问题描述
我似乎无法垂直对齐 Bootstrap 表行中所有不同类型的元素。我希望“选择”下拉菜单、描述文本和按钮都垂直居中显示。我需要做什么来解决这个问题？
这是代码：
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>testing...</title>
<style>
td {
height: 1em;
vertical-align: middle;
}
</style>
</head>
<body>
<div style="margin-left: 0px">
<table class="table table-striped table-hover">
<colgroup>
<col span="1" style="width: 4em">
<col span="1" style="width: 15em">
<col span="1" style="width: 4em">
</colgroup>
<tbody>
<tr scope="row"><td>
<select class="form-control" id="qty">
<option>0</option>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</td><td>Apples</td><td>10lb</td><td><button type="button" class="btn btn-primary btn-sm">Add</button></td></tr>
</table>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
解决方案
设置vertical-align:middle为 .table 类表数据。
.table td {
height: 1em;
vertical-align: middle;
}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>testing...</title>
<style>
.table td {
height: 1em;
vertical-align: middle;
}
</style>
</head>
<body>
<div style="margin-left: 0px">
<table class="table table-striped table-hover">
<colgroup>
<col span="1" style="width: 4em">
<col span="1" style="width: 15em">
<col span="1" style="width: 4em">
</colgroup>
<tbody>
<tr scope="row">
<td>
<select class="form-control" id="qty">
<option>0</option>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</td>
<td>Apples</td>
<td>10lb</td>
<td><button type="button" class="btn btn-primary btn-sm">Add</button></td>
</tr>
</table></div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>解决方案 2：您也可以使用 !important 来覆盖 css 属性。
td {
height: 1em;
vertical-align: middle !important;
}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>testing...</title>
<style>
td {
height: 1em;
vertical-align: middle !important;
}
</style>
</head>
<body>
<div style="margin-left: 0px">
<table class="table table-striped table-hover">
<colgroup>
<col span="1" style="width: 4em">
<col span="1" style="width: 15em">
<col span="1" style="width: 4em">
</colgroup>
<tbody>
<tr scope="row">
<td>
<select class="form-control" id="qty">
<option>0</option>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</td>
<td>Apples</td>
<td>10lb</td>
<td><button type="button" class="btn btn-primary btn-sm">Add</button></td>
</tr>
</table>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>解决方案 3：使用引导程序将align-middle类添加到 td.
<tr scope="row">
<td class="align-middle">
<select class="form-control" id="qty">
<option>0</option>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</td>
<td class="align-middle">Apples</td>
<td class="align-middle">10lb</td>
<td class="align-middle"><button type="button" class="btn btn-primary btn-sm">Add</button></td>
</tr>
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>testing...</title>
<style>
td {
height: 1em;
}
</style>
</head>
<body>
<div style="margin-left: 0px">
<table class="table table-striped table-hover">
<colgroup>
<col span="1" style="width: 4em">
<col span="1" style="width: 15em">
<col span="1" style="width: 4em">
</colgroup>
<tbody>
<tr scope="row">
<td class="align-middle">
<select class="form-control" id="qty">
<option>0</option>
<option>1</option>
<option>2</option>
<option>3</option>
</select>
</td>
<td class="align-middle">Apples</td>
<td class="align-middle">10lb</td>
<td class="align-middle"><button type="button" class="btn btn-primary btn-sm">Add</button></td>
</tr>
</table>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>推荐阅读
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