一种解决方案是将按钮包装在
form-group
然后添加类
d-flex
和
align-items-end
到
col-*
包含它的DIV。例子:
<div class="col-md-3 d-flex align-items-end">
<div class="form-group">
<button type="submit" class="btn btn-primary">
<i class="fa fa-fw fa-save"></i>Save
</button>
</div>
</div>
最小化示例:
注意
border
和
border-*
类只是帮助可视化布局。
<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/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
<div class="container-fluid">
<form method="POST" enctype="multipart/form-data" class="form-horizontal">
<div class="form-group row">
<div class="col-md-4">
<input class="form-control" type="text" placeholder="Search by Unit"/>
</div>
<div class="col-md-4">
<button type="submit" class="btn btn-primary">
<i class="fa fa-fw fa-search"></i>Search
</button>
</div>
</div>
</form>
<form method="POST" enctype="multipart/form-data" class="form-horizontal">
<div class="row">
<div class="col-md-4 border border-warning">
<div class="form-group">
<label for="zones">Zones</label>
<select class="form-control" id="zones">
<option>Zone1</option>
<option>Zone2</option>
</select>
</div>
</div>
<div class="col-md-5 border border-primary">
<div class="form-group">
<label for="unitname">Unit Name</label>
<input class="form-control" type="text" id="unitname" placeholder="Enter the Unit Name" />
</div>
</div>
<div class="col-md-3 d-flex align-items-end border border-danger">
<div class="form-group">
<button type="submit" class="btn btn-primary">
<i class="fa fa-fw fa-save"></i>Save
</button>
</div>
</div>
</div>
</form>
</div>