无法放大文本框，并将单词对齐在一行中而不是形成 2 行

Question

我正在尝试使用 input-lg 放大文本框，但它不起作用，它保持不变。此外，文本溢出到下一行，试图使它们对齐到文本框旁边的一行中。

<div class="modal-body form-horizontal">
<form class="form-horizontal" id="step2">
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-2 control-label col text-right" ><b>Email:</b></label>
<div class="col-sm-4">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your Email Address" />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-2 control-label col text-right" ><b>New Password:</b></label>
<div class="col-sm-4">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your New Password" />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-2 control-label col text-right" ><b>Role:</b></label>
<div class="col-sm-4">
<select class="form-control input-lg" id="selectStaff">
<option>1</option>
<option>2</option>
</select>
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-2 control-label col text-right" ><b>Created At:</b></label>
<div class='col-sm-4'>
<input type='text' class="form-control input-lg" id='datetimepicker4' />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-2 control-label col text-right" ><b>Updated At:</b></label>
<div class="col-sm-4">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your New Password" />
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="Submit" class="btn btn-primary">Done</button>
</div>      
</form>
</div>

Answer 1

您使用的是哪个版本的引导程序？Bootstrap 4 没有input-lg类。我已经在您的代码中添加了最新的引导程序 4.5.0。

我将col-sm-2修改为col-sm-4，col-sm-4修改为col-sm-8，以调整标签和输入文本的宽度。

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"></script>
<div class="modal-body form-horizontal">
<form class="form-horizontal" id="step2">
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-4 control-label col text-right"><b>Email:</b></label>
<div class="col-sm-8">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your Email Address" />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-4 control-label col text-right"><b>New Password:</b></label>
<div class="col-sm-8">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your New Password" />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-4 control-label col text-right"><b>Role:</b></label>
<div class="col-sm-8">
<select class="form-control input-lg" id="selectStaff">
<option>1</option>
<option>2</option>
</select>
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-4 control-label col text-right"><b>Created At:</b></label>
<div class='col-sm-8'>
<input type='text' class="form-control input-lg" id='datetimepicker4' />
</div>
</div>
<div class="form-group row align-items-center justify-content-center">
<label for="name" class="col-sm-4 control-label col text-right"><b>Updated At:</b></label>
<div class="col-sm-8">
<input id="name" class="form-control input-lg" type="text" placeholder="Enter Your New Password" />
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="Submit" class="btn btn-primary">Done</button>
</div>
</form>
</div>