Html 导航栏引导示例-包括徽标/图像

我正在测试bootstrap，并对使用它运行的代码有一种感觉

我用IDE做了一个简单的测试，看看内容在浏览器中是如何工作的。我喜欢它的外观和感觉，我想知道它的代码是怎样的：

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li class="divider"></li>
            <li><a href="#">Separated link</a></li>
            <li class="divider"></li>
            <li><a href="#">One more separated link</a></li>
          </ul>
        </li>
      </ul>
      <form class="navbar-form navbar-left" role="search">
        <div class="form-group">
          <input type="text" class="form-control" placeholder="Search">
        </div>
        <button type="submit" class="btn btn-default">Submit</button>
      </form>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li class="divider"></li>
            <li><a href="#">Separated link</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

    element.style {
    }
@media (min-width: 768px)
.navbar>.container .navbar-brand, .navbar>.container-fluid .navbar-brand {
  margin-left: -15px;
}
.navbar-default .navbar-brand {
  color: #777;
}
.navbar-brand {
  float: left;
  height: 50px;
  padding: 15px 15px;
  font-size: 18px;
  line-height: 20px;
}
a {
  color: #337ab7;
  text-decoration: none;
}
a {
  background-color: transparent;
}
* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
user agent stylesheeta:-webkit-any-link {
  color: -webkit-link;
  text-decoration: underline;
  cursor: auto;
}
Inherited from 
body {
  font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size: 14px;
  line-height: 1.42857143;
  color: #333;
  background-color: #fff;
}
Inherited from 
html {
  font-size: 10px;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}
html {
  font-family: sans-serif;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}
Pseudo ::before element
:after, :before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
Pseudo ::after element
:after, :before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

我继续将nav品牌级别更改为：

<a class="navbar-brand" href="#"><img src="logo.gif" width="238" height="50" alt=""/></a>

因此，删除文本，并替换为相应大小的图像，但它似乎已经离开了主元素的容器

---

这是在bootstrap中格式化包含图像的标题的正确方法，还是我采取了简单的方法，并因此得到了较差的结果？

对于图像，它应该是

<div class="navbar-header">
  <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
    <span class="sr-only">Toggle navigation</span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
  </button>
  <a class="navbar-brand" href="#">
    <img alt="Brand" src="...">
  </a>
</div>

---

我过去就是这样做的，而且似乎很有效。您可能需要根据正确的方法调整大小和边距以正确定位。您需要设置元素的样式和位置。如何将其包含在我创建的导航框架内？

.navbar-brand img{
height: ;
width: ;
}