问题描述
我正在尝试创建一个叠加层,类似于 jQuery UI Dialog 使用的叠加层.我可以像这样创建叠加层:
I am trying to create an overlay, similar to the one that jQuery UI Dialog uses. I can create the overlay like this:
var $overlay = $('<div class="ui-widget-overlay"></div>').hide().appendTo('body');
//...later in my script
$overlay.fadeIn();
但是当我向下滚动时,覆盖层会被切断.我注意到 jQuery UI 正在动态设置该 div 的宽度和高度.所以我想重用这个功能而不是重新发明轮子.如何创建这样的叠加层,或在 jQuery UI 中重用叠加层?
But the overlay cuts off when I scroll down. I noticed that jQuery UI is setting the width and height on that div dynamically. So I would like to reuse this functionality instead of reinventing the wheel. How can I create an overlay like this, or reuse the one in jQuery UI?
设置overlay的宽/高为文档的宽/高,然后在window resize事件上绑定一个函数来调整overlay的宽/高以匹配新文档的宽/高:
Set the width/height of the overlay to be the width/height of the document, then bind a function on the window resize event to adjust the overlay width/height to match the new document width/height:
$(document).ready(function(){
var $overlay = $('<div class="ui-widget-overlay"></div>').hide().appendTo('body');
$('.trigger').click(function(){
$('div').slideDown();
$('.ui-widget-overlay').fadeIn();
setOverlayDimensionsToCurrentDocumentDimensions(); //remember to call this when the document dimensions change
});
$(window).resize(function(){
setOverlayDimensionsToCurrentDocumentDimensions();
});
});
function setOverlayDimensionsToCurrentDocumentDimensions() {
$('.ui-widget-overlay').width($(document).width());
$('.ui-widget-overlay').height($(document).height());
}
请注意,每当文档的高度发生变化(添加元素、向下滑动的动画元素等)时,您都需要调整叠加层的大小.
Note that whenever the height of the document changes (adding elements, animating elements that slide down, etc), you will need to resize the overlay.
推荐答案
你可以这样做:
<style type="text/css">
* {border:0;margin:0}
.ui-widget-overlay {
background: repeat-x scroll 50% 50% #AAA;
opacity:0.3;
}
.ui-widget-overlay {
height:100%;
left:0;
position:absolute;
top:0;
width:100%;
}
</style>
<script type="text/javascript">
$(function () {
var $overlay = $('<div class="ui-overlay"><div class="ui-widget-overlay"></div></div>').hide().appendTo('body');
$overlay.fadeIn();
$(window).resize(function () {
$overlay.width($(document).width());
$overlay.height($(document).height());
});
});
</script>
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