我正在测试引导程序,并对其进行运行的代码有所了解。
我使用IDE进行了一个简单的测试,以查看内容在浏览器中的工作方式。我喜欢外观,并想知道这样的代码如何:
<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>
使用这样的CSS:
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品牌类别更改为:
<a class="navbar-brand" href="#"><img src="logo.gif" width="238" height="50" alt=""/></a>
因此,删除了文本,并用图像替换了文本(大小相应),但是它似乎已经离开了主要元素的容器。
这是格式化引导程序中包含图像的标头的正确方法,还是我因此而采取了简便的方法并因此获得了较差的结果?
最佳答案
对于图像应该是
<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>
然后在css中定义图像的大小
.navbar-brand img{
height: ;
width: ;
}
这是我过去所做的,并且似乎有效地工作。您可能需要调整尺寸和边距才能正确定位