我想要的影响是我只能与Google+顶级导航效果相比较,并通过一些视差来比较。也就是说,当您向下滚动时,搜索栏会消失,您的左侧会显示一个小“工具栏”。我找到了一些jQuery来帮助我,在我弄明白之后我会搞砸。
我首先要做的是从条形图下方滚动背景图像(请参阅jfiddle)并向上滚动到最终保持放置的条形图。这是我到目前为止所得到的:
<section id="account-bar" class="shelf navbar-fixed-top">
<div class="navbar-header">
more...
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li><a href="#">Links</a></li>
</ul>
</div>
</section>
与相关的css:
section#account-bar {
background-color:#111;
color:#ccc;
font-size:1.1em;
height:3.6em;
line-height:3.4em;
text-align:right
}
section#account-bar:after {
content:'';
width:267px;
height:46px;
background:url('http://lorempixel.com/267/46/') no-repeat 0 0 scroll;
background-size:267px 46px;
top:0;
left:0;
position:absolute;
}
编辑:这是jsFiddle
答案 0 :(得分:1)
虽然目前在纯CSS中不可能,但是使用window.onscroll
,scrollTop
和几个if
语句,您可以创建一个可爱的状态更改效果,类似于你正在寻找
查看Google Plus页面,导航上方有一些内容。因此,我按如下方式设置了我的HTML
<div class='topContent'>Top Content</div>
<nav>
<div class='googleSlide'></div> <!--The image that slides in from the left-->
<div class='navContent'>Nav bar content</div> <!-- Everything else in nav -->
</nav>
以下是我重要的CSS行以使其正常运行
.topContent { height:75px; /* Arbitrary but necessary value */ }
nav { height:44px; width:100%; }
nav div { float:left; }
.googleSlide {
background-image: url(//ssl.gstatic.com/s2/oz/images/sprites/ribbon-nav-1x-69dd561f4c55d6702aadda4e3b4ce787.png);
background-position:0 -100px;
height: 44px; /* More arbitrary but necessary values */
width: 44px;
margin-left:-55px;
transition: all 0.200s; /* To smooth the transition to the new state */
}
最后,我们有javascript让它全部正常工作
window.onscroll = function() { // Fires whiles the page scrolls
var navigation = document.getElementsByTagName('nav')[0],
slide = document.getElementsByClassName('googleSlide')[0];
// Conditional to check whether scroll is past our marker, second conditional
// to make sure that it doesn't keep firing when scrolling inside of the range
if(document.body.scrollTop > 75 && navigation.style.background != 'white') {
navigation.style.background = 'white';
navigation.style.border = '1px solid black';
navigation.style.position = 'fixed';
slide.style.marginLeft = '0px';
}
// Same as above but toggles back to the original state
if(document.body.scrollTop < 75 && navigation.style.background != 'grey') {
navigation.style.background = 'grey';
navigation.style.border = 'none';
slide.style.marginLeft = '-55px';
navigation.style.position = 'static';
navigation.style.top = '0px';
}
}
我不确定滚动背景究竟是什么意思,但是类似的方法可以让你得到你想要的东西