jquery拖拽自动排序插件使用方法详解
本文为大家分享了jquery拖拽自动排序插件，供大家参考，具体内容如下
该插件并不是原生js写的，是基于jquery的，想看原生的话，请绕道而行。
html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="drag.js"></script>
<style type="text/css">
div{
height: 200px;
overflow-y: auto;
}
ul{
margin: 0;
padding: 0;
list-style: none;
box-shadow: rgba(0, 0, 0, 0.2) 5px 5px 10px;
display: inline-block;
}
.drag-item{
width: 100px;
padding: 0 10px;
line-height: 38px;
cursor: move;
}
.draging{
background-color: #ccc !important;
}
.no-draging{
background-color: #fff !important;
}
</style>
</head>
<body>
<ul class="drag-box">
</ul>
</body>
<script type="text/javascript">
new Drag({
container: '.drag-box',
data: ['应用1','应用2','应用3','应用4','应用5','应用6','应用7','应用8','应用9']
});
</script>
</html>js:
(function(win){
function Drag(opts){
this.init(opts);
};
Drag.prototype = {
constructor: Drag,
options: {
container: '',
data: [], //可以是数据，也可以是html标签
className: 'item'
},
//初始化
init: function(opts){
$.extend(this.options, opts);
this.$el = $(this.get('container'));
this._render();
this._bindEvent();
},
get: function(key){
return this.options[key];
},
set: function(key, value){
this.options[key]=value;
},
//渲染列表
_render: function(){
var me = this, lis = '',
data = me.get('data') || [];
for(var i=0,len=data.length;i<len;i++) lis+='<li class="drag-item" id="drag-item-'+i+'">'+ data[i]+'</li>';
me.$el.append(lis)
.find('li').attr('draggable',true)
.addClass(this.get('className'));
},
//绑定事件
_bindEvent: function(){
var me = this,
$lis = $('li', me.$el),
events = ['dragstart', 'dragenter', 'dragover', 'drop', 'dragend'];
$.each(events, function(index, item){
$lis.on(item, function(e){
me['_'+item+'Handle'] && me['_'+item+'Handle'](e, me);
});
})
$lis.hover(function(){
$(this).css('background-color','#eee');
},function(){
$(this).css('background-color','#fff');
});
},
//开始拖动
_dragstartHandle: function(e){
var me = this,oe = e.originalEvent;
if(oe.dataTransfer){
oe.dataTransfer.setData('text', '');
}
me.$drag = $(e.currentTarget);
$('li',me.$el).removeClass('item-hover');
me.$drag.addClass('draging').siblings().addClass('no-draging');
},
_dragenterHandle: function(e){
var me = this;
me.$drop = $(e.currentTarget);
if(me.timer){clearTimeout(me.timer)} //事件控制
me.timer = setTimeout(function(){
if(me.$drag.attr('id') !== me.$drop.attr('id')){
me._createMask();
if(me.$drag.index()<me.$drop.index()) me.$drag.insertAfter(me.$drop);
else me.$drag.insertBefore(me.$drop);
}
}, 30);
},
_dragoverHandle: function(e){
var oe = e.originalEvent;
e.preventDefault();
return false;
},
_dropHandle: function(e){
e.preventDefault();
e.stopPropagation();
return false;
},
//拖动结束
_dragendHandle: function(e){
var me = this;
me.$mask && me.$mask.remove();
setTimeout(function(){
$('li', me.$el).removeClass('draging no-draging');
},30);
},
//创建遮罩
_createMask: function(){
var me = this,$mask = me.$mask = $('<div class="drag-mask"></div>');
$mask.css({
position: 'absolute',
width: me.$drop.outerWidth(),//new
height: me.$drop.outerHeight(),//new
left: me.$drop.position().left,
top: me.$drop.position().top+me.$el.scrollTop(),//new
backgroundColor: '#fff'
});
$mask.on({
'drop': me._dropHandle,
'dragover': me._dragoverHandle
});
this.$el.find('.drag-mask').remove();
this.$el.append($mask);
}
};
win.Drag = Drag;
})(window);踩得坑：
1、关于dataTransfer, 事件对象e中是没有该属性的，要找该属性应该通过e.originalEvent.dataTransfer中去找。
2、兼容火狐浏览器。如果不这样操作，火狐下是无法运行的：
if(oe.dataTransfer){
oe.dataTransfer.setData('text', '');
}3、dragover事件每隔 350 毫秒会被触发一次。
4、dragstart、dragenter、dragend事件通过jquery绑定，事件处理函数中的this指向最外层对象，例如上面的new Drag()；dragover、drop事件通过jquery绑定，事件处理函数中的this指向被绑定的html标签。
5、jquery获取包括padding的宽度调用：$el.outerWidth()和$el.outerHeight() 。
6、只有属性draggable="true"的元素才可以被拖动。
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