Jquery 多行拖拽图片排序 jq优化
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Jquery 多行拖拽图片排序 jq优化
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jQuery圖片拖動(dòng)排序代碼</title><style type="text/css">.item_container{position:relative;height:auto;overflow:hidden;}
.item_content ul{list-style:none;padding:0;margin:0;}
.item_content ul li{width:200px;height:160px;float:left;margin:10px }
.item_content{width:50%;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="img/500x500-1.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-2.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-3.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-4.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-5.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-6.png" width="150" height="150"> </div></li><li><div class="item"> <img src="img/500x500-7.png" width="150" height="150"> </div></li></ul></div>
</div>
<script src="js/jquery-1.8.3.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_container .item").each(function (i) { this.init = function () { // 初始化this.box = $(this).parent();$(this).attr("index", i).css({position: "absolute",left: this.box.position().left,top: this.box.position().top,cursor: "move"}).appendTo(".item_container");this.drag();},this.move = function (callback) { // 移動(dòng)
$(this).stop(true).animate({left: this.box.position().left,//相對(duì)父級(jí)的距離
top: this.box.position().top}, 500, function () {if (callback) {callback.call(this);}});},this.collisionCheck = function () {var currentItem = this;var direction = null;$(this).siblings(".item").each(function () {if (currentItem.pointer.x > this.box.offset().left &¤tItem.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())) {// 返回對(duì)象和方向if (currentItem.box.position().top < this.box.position().top) {direction = "down";} else if (currentItem.box.position().top > this.box.position().top) {direction = "up";} else {direction = "normal";}this.swap(currentItem, direction);}});},this.swap = function (currentItem, direction) { // 交換位置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;// 開始交換位置
currentItem.collisionCheck();});$(document).mouseup(function () {if (!isDrag) return false;isDrag = false;currentItem.move(function () {$(this).css({"opacity": "1","z-index": 0});});});}this.init();});
});</script></body>
</html>
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轉(zhuǎn)載于:https://www.cnblogs.com/yi-miao/p/9269776.html
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