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图片拖动排序代码</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) { // 移动 $(this).stop(true).animate({ left: this.box.position().left,//相对父级的距离 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 && 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.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> </body> </html>
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