由于缺乏浏览量,我想重新表达我的问题。有人知道为什么在Chrome和IE上滚动窗口时修改背景位置会引起闪烁吗?
基本上,这样的修改在Chrome和IE中总是会导致闪烁:
$(window).scroll(function(){$(divwithbg).css('background-position','center '+positiveinteger+px')});
任何主流浏览器似乎都没有出现这样的闪烁问题:
$(window).scroll(function(){$(divwithbg).css('background-position','center '+negativeinteger+px')});
如果你想看到这个问题,请尝试下面的示例代码,以及附加的图片。如果你将 "data-parallaxdirection =“0”" 进行设置,那么不会有抖动。而将 "data-parallaxdirection =“1”" 进行设置,则会出现抖动。我已经在这篇文章中附上了我使用的图片。
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.parallax-container {width:100%; position:relative; display:block; overflow:hidden; background-color:black; background-position:center center; background-repeat:no-repeat;}
</style>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var CONTAINER = window;
var AVAILHEIGHT;
$(document).ready(function(){
$(window).scroll(ParallaxScrollEvent);
AVAILHEIGHT = $(window).height();
$('.parallax-container').height(AVAILHEIGHT/1.1);
});
function ParallaxScroll(obj)
{
var containerTop = $(obj).position().top;
var containerHeight = $(obj).height();
var parallaxspace = parseInt($(obj).attr('data-parallaxspace'));
var goforward = parseInt($(obj).attr('data-parallaxdirection'));
var scrollTop = $(window).scrollTop() + AVAILHEIGHT;
// var links = $('.location-links'); //on contact page
if( scrollTop > containerTop)
{
var pos = 0;
if(goforward)
{
// why does this cause flickering?
var scrolled = $(window).scrollTop() - containerTop;
pos = 1.2*scrolled;
}
else
{
// why is this flicker free?
pos = -1*(scrollTop-containerTop)*parallaxspace/(2*containerHeight);
}
$(obj).css('background-position', 'center '+pos+'px');
}
}
function ParallaxScrollEvent()
{
var parallaxcontainer = $('.parallax-container');
for(var c=0; c< parallaxcontainer.length; c++)
ParallaxScroll(parallaxcontainer[c]);
}
</script>
</head>
<body>
<div class="parallax-container" style="background-image:url(images/location/2.jpg);" data-parallaxdirection="1" data-parallaxspace="800">
</div>
<div class="parallax-container" style="background-image:url(images/location/2.jpg);" data-parallaxdirection="1" data-parallaxspace="800">
</div>
<div class="parallax-container" style="background-image:url(images/location/2.jpg);" data-parallaxdirection="1" data-parallaxspace="800">
</div>
</body>
</html>