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使用以下代码我尝试将拖放示例拖动到特定区域并添加其他拖动组合。前三个'drag'-divs的行为如预期，不能拖到'container'-div之外。另一方面，后来添加的'drag'-div'不会。组合拖放js示例
如何添加像前三个'拖'一样的'容器'内的可拖动对象？
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=8" />
<link href="http://threedubmedia.com/inc/img/favicon.ico" rel="shortcut icon" />
<link href="http://threedubmedia.com/inc/css/base.css" rel="stylesheet" />
<script src="http://threedubmedia.com/inc/js/jquery-1.7.2.js"></script>
<script src="http://threedubmedia.com/inc/js/jquery.event.drag-2.2.js"></script>
<script src="http://threedubmedia.com/inc/js/jquery.event.drag.live-2.2.js"></script>
<script src="http://threedubmedia.com/inc/js/jquery.event.drop-2.2.js"></script>
<script src="http://threedubmedia.com/inc/js/jquery.event.drop.live-2.2.js"></script>
<script src="http://threedubmedia.com/inc/js/excanvas.min.js"></script>
<title>ThreeDubMedia · jquery.event.drag</title>
</head>
<body>
<script type="text/javascript">
jQuery(function($){
var num = 1;
var $div = $('#container');
$('.drag')
.drag("start",function(ev, dd){
dd.limit = $div.offset();
dd.limit.bottom = dd.limit.top + $div.outerHeight() - $(this).outerHeight();
dd.limit.right = dd.limit.left + $div.outerWidth() - $(this).outerWidth();
})
.drag(function(ev, dd){
$(this).css({
top: Math.min(dd.limit.bottom, Math.max(dd.limit.top, dd.offsetY)),
left: Math.min(dd.limit.right, Math.max(dd.limit.left, dd.offsetX))
});
});
$('#add').click(function(){
$('<div class="drag"/>')
.text(num++)
.appendTo(document.body)
.css({
top: Math.random() * 241 + $div.offset().top,
left: Math.random() * ($(window).width() - 100) + 20,
});
});
});
</script>
<h1>Live Drag Demo</h1>
<p>
<input type="button" id="add" value="Add a Box" />
to the screen, drag it around, thanks to "live" delegation.
</p>
<div id="container"></div>
<div class="drag" style="left:40px;"></div>
<div class="drag" style="left:120px;"></div>
<div class="drag" style="left:200px;"></div>
<style type="text/css">
.drag {
position: absolute;
border: 1px solid #89B;
background: #BCE;
height: 58px;
width: 58px;
cursor: move;
top: 120px;
text-align: center;
line-height: 58px;
}
#container {
height: 299px;
border: 1px dashed #888;
}
</style></body>
</html>