如何在Bootstrap上向左浮动？

Question

Tech-filter不向左浮动。.col md-8如何操作！？我的错误是什么？

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<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet"/>
 <div class="row tech-list">
 	<div class="title col-md-6">
        <h1>Rent Technics</h1>
      </div>

      <div class="breadcrumbs col-md-4 pull-right">...
      </div>

      <div class="col-md-8">
      <small style="float:left">3279 technics</small>
      <div class="bt-group">
...
      </div>
    </div>
    <div class="col-md-4">
      <div class="bt-group pull-right">
...
      </div>
    </div>
    <div class="list-wrapper">
    <div class="col-md-8 ">
     ...
        </div>
      </div>
     </div>

     ...
 	</div>

 	<div class="tech-filter col-md-4">
      <form action="">
        <div class="form-group">
            ...
        </div>
      </form>
      
    </div>
</div>

​

我拿不起过滤器块

​

​

Answer 1

尝试添加div row或对tech-filter使用更宽的列col-md-12

<div class="row">
   <div class="tech-filter col-md-4">
        <form action="">
            <div class="form-group">
            ...
            </div>
        </form>
    </div>
</div>

-或者--

<div class="tech-filter col-md-12">
</div>