输入框组
<div class="input-group"> <span class="input-group-addon">$</span> <input type="text" class="form-control" name=""> </div>
尺寸:.input-group-lg .input-group-sm
<div class="input-group"> <input type="text" class="form-control" aria-label="..."> <div class="input-group-btn"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Action <span class="caret"></span></button> <ul class="dropdown-menu dropdown-menu-right"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li><a href="#">Separated link</a></li> </ul> </div><!-- /btn-group --> </div><!-- /input-group -->