我能够在下面的示例中缩小引导程序Navbar时使用Css3 Transition，但是在向下滚动（重新展开）时，navbar的高度不会处理转换，只是从{{跳转到min-height: 80px; 1}}
请你看看这个演示，让我知道我做错了什么？
min-height: 60px;.navbar {
min-height: 80px;
transition: min-height 0.5s linear;
}
.navbar-brand {
padding: 0 15px;
height: 80px;
line-height: 80px;
transition: height 0.5s linear;
transition: line-height 0.5s linear;
}
.navbar-nav > li > a {
padding-top: 0px;
padding-bottom: 0px;
line-height: 80px;
transition: line-height .5s linear;
}
.affix {
width: 100%;
top: 0px;
min-height: 60px;
transition: min-height 0.5s linear;
}
.affix .navbar-brand {
padding: 0 15px;
height: 60px;
line-height: 60px;
}
.affix .navbar-nav > li > a {
padding-top: 0px;
padding-bottom: 0px;
line-height: 60px;
}
.container1 {
height: 2000px;
}
答案 0 :(得分：1)
transition中缺少一个（或多个）更改的属性。
在下面的示例中，我将其更改为all以显示其外观，但我建议您改为编写每个属性，如下所示：
transition: height 0.5s linear, line-height 0.5s linear;
如果你喜欢这样，最后一次覆盖第一次
transition: height 0.5s linear;
transition: line-height 0.5s linear;
.navbar {
min-height: 80px;
transition: all 0.5s linear;
}
.navbar-brand {
padding: 0 15px;
height: 80px;
line-height: 80px;
transition: all 0.5s linear;
}
.navbar-nav > li > a {
padding-top: 0px;
padding-bottom: 0px;
line-height: 80px;
transition: all .5s linear;
}
.affix {
width: 100%;
top: 0px;
min-height: 60px;
transition: all 0.5s linear;
}
.affix .navbar-brand {
padding: 0 15px;
height: 60px;
line-height: 60px;
}
.affix .navbar-nav > li > a {
padding-top: 0px;
padding-bottom: 0px;
line-height: 60px;
}
.container1 {
height: 2000px;
}<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="0">
<div class="container">
<!-- 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" aria-expanded="false">
<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-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<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>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<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-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<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>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<div class="container1"></div>