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jquery 拖拽变换位置
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>测试</title>
<style>
.item_content ul { list-style: none; }
.item_content ul li { width: 200px; height: 160px; float: left; margin: 10px }
.item_content { width: 740px; height: auto; border: 1px solid #ccc; float: left; }
.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; }
.close { display: block; width: 20px; height: 20px; top: 0; right: 0; z-index: 9999; position: absolute; text-align: center; font-size: 16px; cursor: pointer; color: aliceblue }
</style>
</head>
<body>
<div class="item_container">
<div class="item_content" id="imageChange">
<ul>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-1.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-2.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-3.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-4.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-5.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-6.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-7.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-8.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
<li>
<div class="item"> <img src="http://www.jq22.com/img/cs/500x500-9.png" width="150" height="150">
<span onclick="removePicture(this)" class="rmPicture close">×</span> </div>
</li>
</ul>
</div>
</div>
</body>
</html>
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script>
/*
作者: 谢泽龙
联系QQ: 454675335 (灬丿Spam丶)
时间: 2014-9-24
www.jq22.com
*/
$(function() {
function Pointer(x, y) {
this.x = x ;
this.y = y ;
}
function Position(left, top) {
this.left = left ;
this.top = top ;
}
$(".item_container .item").each(function(i) {
//$(".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_container") ;
this.drag() ;
},
this.move = function(callback) { // 移动
$(this).stop(true).animate({
left : this.box.offset().left,
top : this.box.offset().top
}, 500, function() {
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" ;
}
console.log(direction+"---");
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_container .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_container .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 ;
}) ;
$(document).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() {
if(!isDrag) return false ;
isDrag = false ;
currentItem.move(function() {
$(this).css({
"opacity" : "1",
"z-index" : 0
}) ;
}) ;
}) ;
}
this.init() ;
}) ;
}) ;
</script>
jquery 拖拽变换位置