简单实用的拖拽排序
这个拖拽排序不需要引入任何外在的JS或者Css样式，也是在网上找的，具体出处给忘了，向原作者表示谢意【下列代码粘贴为*.xml文件可直接运行】
使用方法:
遵循下列代码格式，把图片部分替换为自己的图片，并把JS和CSS样式一并拷进页面就可以正常使用了
在滴55行，用红色字体标出的一行代码当中有一个数字 500，这个数字是控制图片交换位置的延迟时间的，数字越小图片交换位置速度越快
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery动画图片拖动排序效果</title>
<style>
*{ margin:0; padding:0; list-style:none;}
.item_content ul {list-style:none;}
.item_content ul li {width:200px;height:120px;float:left;margin:10px 0px 0px 10px;}
.item_content {width:640px;height:400px;border:1px solid #ccc;margin:10px auto;}
.item_content .item {width:200px;height:120px;line-height:120px;text-align:center;cursor:pointer;background:#ccc;}
.item_content .item img {width:200px;height:120px;border-radius:6px;}
</style>
</head>
<body>
<!-- 代码部分begin -->
<div class="item_content">
<ul>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/youku.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/jd.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/taobao.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/fenghuan.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/souhu.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/wangyi.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/renren.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/360.png" /></div></li>
<li><div class="item"><img src="http://demo.lanrenzhijia.com/2014/pic0929/images/360game.png" /></div></li>
</ul>
</div>
<script src="http://www.lanrenzhijia.com/ajaxjs/jquery.min.js"></script>
<script>
$(function() {
function Pointer(x, y) {
this.x = x ;
this.y = y ;
}
function Position(left, top) {
this.left = left ;
this.top = top ;
}
$(".item_content .item").each(function(i) {
this.init = function() { // 初始化
this.box = $(this).parent() ;
$(this).attr("index", i).css({
position : "absolute",
left : this.box.offset().left,
top : this.box.offset().top
}).appendTo(".item_content") ;
this.drag() ;
},
this.move = function(callback) { // 移动
$(this).stop(true).animate({
left : this.box.offset().left,
top : this.box.offset().top
}, 300, function() { //这里的数字300定义图片交换位置快慢，越小越快
if(callback) {
callback.call(this) ;
}
}) ;
},
this.collisionCheck = function() {
var currentItem = this ;
var direction = null ;
$(this).siblings(".item").each(function() {
if(
currentItem.pointer.x > this.box.offset().left &&
currentItem.pointer.y > this.box.offset().top &&
(currentItem.pointer.x < this.box.offset().left + this.box.width())
//&&(currentItem.pointer.y < this.box.offset().top + this.box.height())
) {
// 返回对象和方向
if(currentItem.box.offset().top < this.box.offset().top) {
direction = "down" ;
} else if(currentItem.box.offset().top > this.box.offset().top) {
direction = "up" ;
} else {
direction = "normal" ;
}
this.swap(currentItem, direction) ;
}
}) ;
},
this.swap = function(currentItem, direction) { // 交换位置
if(this.moveing) return false ;
var directions = {
normal : function() {
var saveBox = this.box ;
this.box = currentItem.box ;
currentItem.box = saveBox ;
this.move() ;
$(this).attr("index", this.box.index()) ;
$(currentItem).attr("index", currentItem.box.index()) ;
},
down : function() {
// 移到上方
var box = this.box ;
var node = this ;
var startIndex = currentItem.box.index() ;
var endIndex = node.box.index(); ;
for(var i = endIndex; i > startIndex ; i--) {
var prevNode = $(".item_content .item[index="+ (i - 1) +"]")[0] ;
node.box = prevNode.box ;
$(node).attr("index", node.box.index()) ;
node.move() ;
node = prevNode ;
}
currentItem.box = box ;
$(currentItem).attr("index", box.index()) ;
},
up : function() {
// 移到上方
var box = this.box ;
var node = this ;
var startIndex = node.box.index() ;
var endIndex = currentItem.box.index(); ;
for(var i = startIndex; i < endIndex; i++) {
var nextNode = $(".item_content .item[index="+ (i + 1) +"]")[0] ;
node.box = nextNode.box ;
$(node).attr("index", node.box.index()) ;
node.move() ;
node = nextNode ;
}
currentItem.box = box ;
$(currentItem).attr("index", box.index()) ;
}
}
directions[direction].call(this) ;
},
this.drag = function() { // 拖拽
var oldPosition = new Position() ;
var oldPointer = new Pointer() ;
var isDrag = false ;
var currentItem = null ;
$(this).mousedown(function(e) {
e.preventDefault() ;
oldPosition.left = $(this).position().left ;
oldPosition.top = $(this).position().top ;
oldPointer.x = e.clientX ;
oldPointer.y = e.clientY ;
isDrag = true ;
currentItem = this ;
}) ;
//定义拖拽事件作用范围
var itemDocument = $("#itemId");
//$(document).mousemove(function(e) {
$(itemDocument).mousemove(function(e) {
var currentPointer = new Pointer(e.clientX, e.clientY) ;
if(!isDrag) return false ;
$(currentItem).css({
"opacity" : "0.8",
"z-index" : 999
}) ;
var left = currentPointer.x - oldPointer.x + oldPosition.left ;
var top = currentPointer.y - oldPointer.y + oldPosition.top ;
$(currentItem).css({
left : left,
top : top
}) ;
currentItem.pointer = currentPointer ;
// 开始交换位置
currentItem.collisionCheck() ;
}) ;
//$(document).mouseup(function() {
$(itemDocument).mouseup(function(){
if(!isDrag) return false ;
isDrag = false ;
currentItem.move(function() {
$(this).css({
"opacity" : "1",
"z-index" : 0
}) ;
}) ;
}) ;
}
this.init() ;
}) ;
}) ;
</script>
<!-- 代码部分end -->
</body>
</html>
