Js照片墙实例演示,可拖动换位置，可随机排序

2024-09-05 12:18:25

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一个基于JavaScript技术的照片墙实例演示,使用鼠标拖动图片可为图片换位置，可随机打乱图片顺序。使用时先准备好一定序列编号的图片集，设定JavaScript代码内的路径，程序会自动读取图片，记得不要让循环溢出哦，那样会出错的。

<!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>JavaScript照片墙实例演示</title><style type="text/css">body,div,h2,ul,li{margin:0;padding:0;}body{font:12px/1.5 Arail;}.box{width:860px;margin:10px auto;background:#eee;border:1px solid #b8b8b8;overflow:hidden}.title{height:30px;line-height:30px;font-size:14px;padding:0 15px 0 35px;border-bottom:1px solid #b8b8b8;background:#fafafa;}.title span{float:left;}.title a{float:right;color:#06f;outline:none;}.title a:hover{color:red;}.box ul{float:left;padding:0 15px 15px 0;}.box li{float:left;width:140px;height:105px;padding:6px;background:#fff;border:1px solid #c3c3c3;display:inline;margin:15px 0 0 15px;list-style:none;}.box li img{float:left;width:140px;height:105px;}.box li.hig{padding:5px;border:2px dashed #f30;opacity:0.5;filter:alpha(opacity=50);}</style><script type="text/javascript">//获取IDvar $ = function (id) {return typeof id === "string" ? document.getElementById(id) : id};//获取tagNamevar $$ = function (tagName, oParent) {return (oParent || document).getElementsByTagName(tagName)};//获取classvar $$$ = function (sClass, oParent) {	var aClass = [],	i = 0,	reClass = new RegExp("(//s|^)" + sClass + "($|//s)"),	aElement = $$("*", oParent);	for (i = 0; i < aElement.length; i++)reClass.test(aElement[i].className) && aClass.push(aElement[i]);	return aClass};//获取元素位置function getPos(obj) {	var iTop = obj.offsetTop;	var iLeft = obj.offsetLeft;	while (obj.offsetParent)	{		iTop += obj.offsetParent.offsetTop;		iLeft += obj.offsetParent.offsetLeft;		obj = obj.offsetParent;	}	return {top:iTop, left:iLeft}	};//创建照片墙对象var PhotoWall = function () {this.initialize.apply(this, arguments)};PhotoWall.prototype = {	initialize: function (obj, aData)	{		var oThis = this;		this.oParent = $(obj);		this.oUl = $$("ul", this.oParent)[0];		this.oBtn = $$("a", this.oParent)[0];		this.zIndex = 1;		this.aPos = [];		this.aData = aData;		this.dom = document.documentElement || document.body;		this.create();		this.oBtn.onclick = function () {oThis.randomOrder()}	},	create: function ()	{		var aFrag = document.createDocumentFragment();		var i = 0;		for (i = 0; i < this.aData.length; i++)		{			var oLi = document.createElement("li");			var oImg = document.createElement("img");			oImg.src = this.aData[i];			oLi.appendChild(oImg);			aFrag.appendChild(oLi)			}		this.oUl.appendChild(aFrag);		this.aLi = $$("li", this.oParent);		this.changeLayout()	},	changeLayout: function ()	{		var i = 0;		this.oParent.style.height = this.oParent.offsetHeight - 2 + "px";		this.aPos.length = 0;		for (i = 0; i < this.aLi.length; i++) this.aLi[i].style.cssText = "";			for (i = 0; i < this.aLi.length; i++)		{			this.aLi[i].index = i;			this.aLi[i].style.top = getPos(this.aLi[i]).top + "px";			this.aLi[i].style.left = getPos(this.aLi[i]).left + "px";			this.aPos.push({left:getPos(this.aLi[i]).left, top:getPos(this.aLi[i]).top})		}		for (i = 0; i < this.aLi.length; i++)		{			this.aLi[i].style.position = "absolute";				this.aLi[i].style.margin = "0";						this.drag(this.aLi[i])		}		},	drag: function (obj, handle)	{		var oThis = this;		var handle = handle || obj;		handle.style.cursor = "move";		handle.onmousedown = function (event)		{			var event = event || window.event;				var disX = event.clientX - this.offsetLeft;			var disY = event.clientY - this.offsetTop;			var oNear = null;			handle.style.zIndex = oThis.zIndex++;						document.onmousemove = function (event)			{				var event = event || window.event;				var iL = event.clientX - disX;				var iT = event.clientY - disY;				var maxL = Math.max(oThis.dom.clientWidth, oThis.dom.scrollWidth) - handle.offsetWidth;				var maxT = Math.max(oThis.dom.clientHeight, oThis.dom.scrollHeight) - handle.offsetHeight;								iL < 0 && (iL = 0);				iT < 0 && (iT = 0);				iL > maxL && (iL = maxL);				iT > maxT && (iT = maxT);											handle.style.left = iL + "px";				handle.style.top = iT + "px";								oNear = oThis.findNearest(obj);								for (var i = 0; i < oThis.aLi.length; i++) oThis.aLi[i].className = "";								oNear && (oNear.className = "hig");								return false			};			document.onmouseup = function ()			{				document.onmousemove = null;				document.onmouseup = null;								if (oNear)				{					handle.index = [handle.index, oNear.index];					oNear.index = handle.index[0];					handle.index = handle.index[1];					oNear.style.zIndex = oThis.zIndex++;					oThis.doMove(handle, oThis.aPos[handle.index]);					oThis.doMove(oNear, oThis.aPos[oNear.index]);										oNear.className = "";				}				else				{					oThis.doMove(handle, oThis.aPos[handle.index])					}								handle.releaseCapture && handle.releaseCapture()			};			this.setCapture && this.setCapture();			return false		};	},	doMove: function (obj, iTarget, callback)	{		var oThis = this;		clearInterval(obj.timer);		obj.timer = setInterval(function ()		{			var iCurL = getPos(obj).left;			var iCurT = getPos(obj).top;			var iSpeedL = (iTarget.left - iCurL) / 5;			var iSpeedT = (iTarget.top - iCurT) / 5;			iSpeedL = iSpeedL > 0 ? Math.ceil(iSpeedL) : Math.floor(iSpeedL);			iSpeedT = iSpeedT > 0 ? Math.ceil(iSpeedT) : Math.floor(iSpeedT);						if (iCurL == iTarget.left && iCurT == iTarget.top)			{				clearInterval(obj.timer);				callback && callback()				}			else			{				obj.style.left = iCurL + iSpeedL + "px";				obj.style.top = iCurT + iSpeedT + "px"				}		}, 30)	},	findNearest: function (obj)	{		var aDistance = [];		var i = 0;		for (i = 0; i < this.aLi.length; i++) aDistance[i] = this.aLi[i] == obj ? Number.MAX_VALUE : this.getDistance(obj, this.aLi[i]);				var minNum = Number.MAX_VALUE;		var minIndex = -1;		for (i = 0; i < aDistance.length; i++) aDistance[i] < minNum && (minNum = aDistance[i], minIndex = i);				return this.isButt(obj, this.aLi[minIndex]) ? this.aLi[minIndex] : null	},	getDistance: function(obj1, obj2)	{		var a = (obj1.offsetLeft + obj1.offsetWidth / 2) - (obj2.offsetLeft + obj2.offsetWidth / 2);		var b = (obj1.offsetTop + obj1.offsetTop / 2) - (obj2.offsetTop + obj2.offsetTop / 2);		return Math.sqrt(a * a + b * b)	},	isButt: function (obj1, obj2)	{		var l1 = obj1.offsetLeft;		var t1 = obj1.offsetTop;		var r1 = l1 + obj1.offsetWidth;		var b1 = t1 + obj1.offsetHeight;				var l2 = obj2.offsetLeft;		var t2 = obj2.offsetTop;		var r2 = l2 + obj2.offsetWidth;		var b2 = t2 + obj2.offsetHeight;				return !(r1 < l2 || b1 < t2 || r2 < l1 || b2 < t1)	},	randomOrder: function ()	{		this.aPos.sort(function () {return Math.random() > 0.5 ? 1 : -1});		for (var i = 0; i < this.aLi.length; i++)		{			this.aLi[i].index = i;			this.doMove(this.aLi[i], this.aPos[i])		}	}};window.onload = function (){	var aBox = $$$("box");	var aData = [];	var aExample = [];	var i = 0;	//生成图片数据	for (i = 1; i < 9; i++) aData[aData.length] = "/jscss/demoimg/wall" + i + ".jpg";	//循环创建多个实例	for (i = 0; i < aBox.length; i++)	{		var oExample = new PhotoWall(aBox[i], aData);		aExample.push(oExample)	}	this.onresize = function ()	{		for (var p in aExample) aExample[p].changeLayout()		};	this.onresize()};</script></head><body><div class="box">    <h2 class="title"><span>一堆90后</span>随机排序</h2>    <ul></ul></div><div class="box">    <h2 class="title"><span>一堆90后</span>随机排序</h2>    <ul></ul></div></body></html>

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