PHP+JSON+瀑布流模式+三种风格+无限拖拽方式
程序员文章站
2022-03-02 21:08:13
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<!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 charset="UTF-8"/>
<title>瀑布流定位</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrap" class="wrap active">
<script language="javascript">
var $id = function(o){ return document.getElementById(o) || o};
for(i=0;i<30;i++){
var src = Math.floor(Math.random()*100);
if(src<10){src="0"+src}
if(src<100){src="0"+src}
var div = document.createElement("div");
div.className = "mode popup_in";
div.innerHTML = "<p class='pic'><a href='#'><img src=img/P_"+src+".jpg style='height:"+"auto"+";'/></a></p><h3 class='tit'><span><a href='#'>"+src+".jpg</a></span></h3>";
div.style.top = 0;
div.style.left = 0;
document.getElementById("wrap").appendChild(div);
}
</script>
</div>
</body>
<script type="text/javascript">
var warpWidth = 220; //格子宽度
var margin = 14; //格子间距
function postPosition(el,childTagName){
var h = []; //记录每列的高度
var box = el.getElementsByTagName(childTagName);
var minH = box[0].offsetHeight,
boxW = box[0].offsetWidth+margin;
n = document.documentElement.offsetWidth / boxW | 0; //计算页面能排下多少Pin
el.style.width = n * boxW - margin + "px";
el.style.visibility = "visible";
for(var i = 0; i < box.length; i++) {//排序算法，有待完善
boxh = box[i].offsetHeight; //获取每个Pin的高度
if(i < n) { //第一行特殊处理
h[i] = boxh;
box[i].style.top = 0 + 'px';
box[i].style.left = (i * boxW) + 'px';
}
else {
minH = Array.min(h); //取得各列累计高度最低的一列
minKey = getarraykey(h, minH);
h[minKey] += boxh+margin ; //加上新高度后更新高度值
el.style.height = h[minKey] +"px";
box[i].style.top = minH+margin + 'px';
box[i].style.left = (minKey * boxW) + 'px';
}
}
for(var i = 0; i < box.length; i++) {
box[i].style.visibility = "visible"; //定位完毕后显示新增节点
}
}
Array.min=function(array)
{
return Math.min.apply(Math,array);
}
/* 返回数组中某一值的对应项数 */
function getarraykey(s, v) {
for(k in s) {
if(s[k] == v) {
return k;
}
}
}
window.onload = function() {
postPosition($id("wrap"),"div");
};
var re;
window.onresize = function() {
clearTimeout(re);
re = setTimeout(resize,100);
};
function resize(){
$id("wrap").className = "wrap active";
postPosition($id("wrap"),"div");
}
</script>
<div id="aaa1" style="display:none;position: fixed;width:400px;height:200px;background:#000;color:#fff;top:30%;left:50%"></div>
</html>
<!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 charset="UTF-8"/>
<title>瀑布流定位+无限拖</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<script language="javascript">
var $id = function(o){ return document.getElementById(o) || o};
function getXMLHttp(){
var xmlhttp;
try {
xmlhttp = new XMLHttpRequest(); // Mozilla / Safari / IE7
} catch (e) {
// IE
var XMLHTTP_IDS = new Array('MSXML2.XMLHTTP.5.0',
'MSXML2.XMLHTTP.4.0',
'MSXML2.XMLHTTP.3.0',
'MSXML2.XMLHTTP',
'Microsoft.XMLHTTP' );
var success = false;
for (var i=0;i < XMLHTTP_IDS.length && !success; i++) {
try {
xmlhttp = new ActiveXObject(XMLHTTP_IDS[i]);
success = true;
} catch (e) {}
}
if (!success) {
throw new Error('Unable to create XMLHttpRequest.');
}
}
return xmlhttp;
}
</script>
</head>
<body>
<div id="wrap" class="wrap "></div>
<div style="text-align:center;padding:20px 0 120px;">正在加载……</div>
</body>
<script type="text/javascript">
/**
* 瀑布流排版Demo
* @version 2012.04.09
* @author leon
* @see http://cued.xunlei.com/log031
* 学习交流 · 版权没有
**/
var t=0;//全局变量，重排开关。服务器能够给出图片宽高则不需要此项
var startH = 0; //加载元素的初始位置
var warpWidth = 220; //格子宽度
var margin = 14; //格子间距
var isAjax = 1; //ajax开关
var sumChild = 0; //记录当前总共有多少个格子
var h = []; //记录每列的高度
function sortNew(el,newBox){
var box = newBox;
postPosition(el,box,"add");//执行定位函数
for(var i = 0; i < box.length; i++) {
box[i].style.visibility = "visible"; //定位完毕后显示新增节点
}
isAjax=0;
startH = h[0];
if( navigator.userAgent.indexOf("Firefox") > -1)
{
scroll(0,startH-500);//火狐滚动条问题，暂无好的解决办法，随便打个补丁先
}
}
function sortAll(el,childTagName){
h = []; //每次重排都要重置列高度记录数组
var box = el.getElementsByTagName(childTagName);
postPosition(el,box,"re");//执行定位函数
}
function postPosition(el,box,op){
var minH = box[0].offsetHeight,
boxW = box[0].offsetWidth+margin;
n = document.documentElement.offsetWidth / boxW | 0; //计算页面能排下多少Pin
el.style.width = n * boxW - margin + "px";
el.style.visibility = "visible";
for(var i = 0; i < box.length; i++) {//排序算法，有待完善
boxh = box[i].offsetHeight; //获取每个Pin的高度
if(i < n && op =="re" || (i < n && op =="add" && h.length<n)) { //第一行特殊处理
h[i] = boxh;
box[i].style.top = 0 + 'px';
box[i].style.left = (i * boxW) + 'px';
box[i].style.opacity = 1;
}
else {
minH = Array.min(h); //取得各列累计高度最低的一列
minKey = getarraykey(h, minH);
h[minKey] += boxh+margin ; //加上新高度后更新高度值
box[i].style.top = minH+margin + 'px';
box[i].style.left = (minKey * boxW) + 'px';
box[i].style.opacity = 1;
}
}
maxH = Array.max(h);
maxKey = getarraykey(h, maxH);
el.style.height = h[maxKey] +"px";
}
Array.min=function(array)
{
return Math.min.apply(Math,array);
}
Array.max=function(array)
{
return Math.max.apply(Math,array);
}
/* 返回数组中某一值的对应项数 */
function getarraykey(s, v) {
for(k in s) {
if(s[k] == v) {
return k;
}
}
}
function getNumber(){
return Math.floor(document.documentElement.clientWidth/(warpWidth+14));
}
//请求数据
function getMore(el,childClass){
var n = getNumber();
el.className = "wrap";
var xmlhttp=getXMLHttp();
if(xmlhttp==null){alert("您的浏览器不支持Ajax!");return;};
xmlhttp.onreadystatechange=stateChange;
xmlhttp.open("POST","json.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("num="+3*n);
function stateChange(){
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
m = xmlhttp.responseText;
changeJeson(el,m,childClass);//处理jeson
}
}
}
function changeJeson(el,json,childClass){
var jsonString = json; // 获取服务器返回的json字符串
var jsonObj = null;
try {
jsonObj = eval('(' + jsonString + ')'); // 将json字符串转换成对象
} catch (ex) {
return null;
}
addList(el,jsonObj,childClass);//执行添加节点函数
}
function addList(el,jsonObj,childClass){
var newBox = [];
for(var i=0;i<jsonObj.images.length;i++)
{
var div = document.createElement("div");
var src =String(jsonObj.images[i].src);
var width =String(jsonObj.images[i].width);
var height =String(jsonObj.images[i].height);
//$id("aaa1").innerHTML =$id("aaa1").innerHTML + src+","
if(src.length == 1) {src = "00" + src}
else if(src.length == 2) {src = "0" + src};
div.className = childClass+" "+"popup_in"; //预留接口
div.innerHTML = "<p class='pic'><a href='#'><img src=img/P_"+src+".jpg style='height:"+"auto"+"'/></a></p><h3 class='tit'><span><a href='#'>"+src+".jpg</a></span></h3>";
div.style.top = startH +"px";
div.style.opacity = 0;
el.appendChild(div);
newBox[i]=div;
}
chackImg(el,newBox);
sumChild = sumChild+Number(jsonObj.images.length);
}
function chackImg(el,newBox){
var imgs =[];
imgs=el.getElementsByTagName("img");//只遍历新增图片
for(i=sumChild;i<imgs.length;i++){
var img = new SImage(icall,el,imgs.length,imgs[i].src,newBox);
}
}
function SImage(callback,el,num,url,newBox) {
var img = new Image();
this.img = img;
this.img.src = url;
var appname = navigator.appName.toLowerCase();
if (appname.indexOf("netscape") == -1) {
//ie
img.onreadystatechange = function() {
if (img.readyState == "complete") {
callback(img,el,num,t,newBox);
}
};
} else {
//firefox
img.onload = function() {
if (img.complete == true) {
callback(img,el,num,newBox);
}
}
}
}
function icall(obj,el,num,newBox){
if(t<num-1){
t++;
}
else{
sortNew(el,newBox);
t=sumChild;
}
}
window.onload = function() {
getMore($id("wrap"),"mode","first");
};
var re;
var so;
window.onresize = function() {
clearTimeout(re);
re = setTimeout(resize,100);
}
function resize(){
$id("wrap").className = "wrap active";
sortAll($id("wrap"),"div");
}
window.onscroll = function(){
var a=document.body.scrollHeight;
var b=document.documentElement.clientHeight;
var c=document.documentElement.scrollTop + document.body.scrollTop;
if((c+b+20>=a)&&isAjax==0){
isAjax=1;
getMore($id("wrap"),"mode");
}
else {return}
}
</script>
<div id="aaa1" style="display:none;position: fixed;width:400px;height:200px;background:#000;color:#fff;top:30%;left:50%"></div>
</html>
<!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 charset="UTF-8"/>
<title>瀑布流定位+无限拖</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<script language="javascript">
var $id = function(o){ return document.getElementById(o) || o};
function getXMLHttp(){
var xmlhttp;
try {
xmlhttp = new XMLHttpRequest(); // Mozilla / Safari / IE7
} catch (e) {
// IE
var XMLHTTP_IDS = new Array('MSXML2.XMLHTTP.5.0',
'MSXML2.XMLHTTP.4.0',
'MSXML2.XMLHTTP.3.0',
'MSXML2.XMLHTTP',
'Microsoft.XMLHTTP' );
var success = false;
for (var i=0;i < XMLHTTP_IDS.length && !success; i++) {
try {
xmlhttp = new ActiveXObject(XMLHTTP_IDS[i]);
success = true;
} catch (e) {}
}
if (!success) {
throw new Error('Unable to create XMLHttpRequest.');
}
}
return xmlhttp;
}
</script>
</head>
<body>
<div id="wrap" class="wrap "></div>
<div style="text-align:center;padding:20px 0 120px;">正在加载……</div>
</body>
<script type="text/javascript">
/**
* 瀑布流排版Demo
* @version 2012.04.09
* @author leon
* @see http://cued.xunlei.com/log031
* 学习交流 · 版权没有
**/
var t=0;//全局变量，重排开关。服务器能够给出图片宽高则不需要此项
var startH = 0; //加载元素的初始位置
var warpWidth = 220; //格子宽度
var margin = 14; //格子间距
var isAjax = 1; //ajax开关
var sumChild = 0; //记录当前总共有多少个格子
var h = []; //记录每列的高度
function sortNew(el,newBox){
var box = newBox;
postPosition(el,box,"add");//执行定位函数
for(var i = 0; i < box.length; i++) {
box[i].style.visibility = "visible"; //定位完毕后显示新增节点
}
startH = h[0];
isAjax=0;
if( navigator.userAgent.indexOf("Firefox") > -1)
{
scroll(0,startH-500);//火狐滚动条问题，暂无好的解决办法，随便打个补丁先
}
}
function sortAll(el,childTagName){
h = []; //每次重排都要重置列高度记录数组
var box = el.getElementsByTagName(childTagName);
postPosition(el,box,"re");//执行定位函数
}
function postPosition(el,box,op){
var minH = box[0].offsetHeight,
boxW = box[0].offsetWidth+margin;
n = document.documentElement.offsetWidth / boxW | 0; //计算页面能排下多少Pin
el.style.width = n * boxW - margin + "px";
el.style.visibility = "visible";
for(var i = 0; i < box.length; i++) {//排序算法，有待完善
boxh = box[i].offsetHeight; //获取每个Pin的高度
if(i < n && op =="re" || (i < n && op =="add" && h.length<n)) { //第一行特殊处理
h[i] = boxh;
box[i].style.top = 0 + 'px';
box[i].style.left = (i * boxW) + 'px';
box[i].style.opacity = 1;
}
else {
minH = Array.min(h); //取得各列累计高度最低的一列
minKey = getarraykey(h, minH);
h[minKey] += boxh+margin ; //加上新高度后更新高度值
box[i].style.top = minH+margin + 'px';
box[i].style.left = (minKey * boxW) + 'px';
box[i].style.opacity = 1;
}
}
maxH = Array.max(h);
maxKey = getarraykey(h, maxH);
el.style.height = h[maxKey] +"px";
}
Array.min=function(array)
{
return Math.min.apply(Math,array);
}
Array.max=function(array)
{
return Math.max.apply(Math,array);
}
/* 返回数组中某一值的对应项数 */
function getarraykey(s, v) {
for(k in s) {
if(s[k] == v) {
return k;
}
}
}
function getNumber(){
return Math.floor(document.documentElement.clientWidth/(warpWidth+14));
//return 3;
}
//请求数据
function getMore(el,childClass){
var n = getNumber();
el.className = "wrap";
var xmlhttp=getXMLHttp();
if(xmlhttp==null){alert("您的浏览器不支持Ajax!");return;};
xmlhttp.onreadystatechange=stateChange;
xmlhttp.open("POST","json.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("num="+3*n);
function stateChange(){
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
m = xmlhttp.responseText;
changeJeson(el,m,childClass);//处理jeson
}
}
}
function changeJeson(el,json,childClass){
var jsonString = json; // 获取服务器返回的json字符串
var jsonObj = null;
try {
jsonObj = eval('(' + jsonString + ')'); // 将json字符串转换成对象
} catch (ex) {
return null;
}
addList(el,jsonObj,childClass);//执行添加节点函数
}
function addList(el,jsonObj,childClass){
var newBox = [];
sumChild = sumChild+Number(jsonObj.images.length);
for(var i=0;i<jsonObj.images.length;i++)
{
var src =String(jsonObj.images[i].src);
//var width =String(jsonObj.images[i].width);
//var height =String(jsonObj.images[i].height);
//$id("aaa1").innerHTML =$id("aaa1").innerHTML + src+","
if(src.length == 1) {src = "00" + src}
else if(src.length == 2) {src = "0" + src};
imgReady("img/P_"+src+".jpg",jsonObj.images.length , i , el , newBox , childClass ,function () {
var height = this.height;
var src = this.src;
var el = this.el;
var newBox = this.newBox;
var childClass = this.childClass;
var i = this.i;
var length = this.length;
callBackAdd(height, src , length, i ,el,newBox,childClass);
});
}
//chackImg(el,newBox);
}
function callBackAdd(height,src, length, i ,el,newBox,childClass){
var div = document.createElement("div");
div.className = childClass+" "+"popup_in"; //预留接口
div.innerHTML = "<p class='pic'><a href='#'><img src="+src+" style='height:"+height+"px'/></a></p><h3 class='tit'><span><a href='#'>"+src+"</a></span></h3>";
div.style.top = startH +"px";
div.style.opacity = 0;
el.appendChild(div);
newBox[i]=div;
t++;
if(t>length-1){
sortNew(el,newBox);
t=0;
}
}
function chackImg(el,newBox){
var imgs =[];
imgs=el.getElementsByTagName("img");//只遍历新增图片
for(i=sumChild;i<imgs.length;i++){
//var img = new SImage(icall,el,imgs.length,imgs[i].src,newBox);
}
}
/**
* 图片头数据加载就绪事件 - 更快获取图片尺寸
* @version 2011.05.27
* @author TangBin
* @see http://www.planeart.cn/?p=1121
* @param {String} 图片路径
* @param {Function} 尺寸就绪
* @param {Function} 加载完毕 (可选)
* @param {Function} 加载错误 (可选)
*/
var imgReady = (function () {
var list = [], intervalId = null,
// 用来执行队列
tick = function () {
var i = 0;
for (; i < list.length; i++) {
list[i].end ? list.splice(i--, 1) : list[i]();
};
!list.length && stop();
},
// 停止所有定时器队列
stop = function () {
clearInterval(intervalId);
intervalId = null;
};
return function (url, length , i, el , newBox , childClass, ready, load, error) {
var onready, width, height, newWidth, newHeight,
img = new Image();
img.src = url;
// 如果图片被缓存，则直接返回缓存数据
if (img.complete) {
//ready.call(img);
//load && load.call(img);
//return;
};
width = img.width;
height = img.height;
img.el = el ;
img.newBox = newBox ;
img.childClass = childClass ;
img.i = i ;
img.length = length ;
// 加载错误后的事件
img.onerror = function () {
error && error.call(img);
onready.end = true;
img = img.onload = img.onerror = null;
};
// 图片尺寸就绪
onready = function () {
newWidth = img.width;
newHeight = img.height;
if (newWidth !== width || newHeight !== height ||
// 如果图片已经在其他地方加载可使用面积检测
newWidth * newHeight > 1024
) {
//alert(ready)
ready.call(img);
onready.end = true;
};
};
//onready();
// 完全加载完毕的事件
img.onload = function () {
// onload在定时器时间差范围内可能比onready快
// 这里进行检查并保证onready优先执行
!onready.end && onready();
load && load.call(img);
// IE gif动画会循环执行onload，置空onload即可
img = img.onload = img.onerror = null;
};
// 加入队列中定期执行
if (!onready.end) {
list.push(onready);
// 无论何时只允许出现一个定时器，减少浏览器性能损耗
if (intervalId === null) intervalId = setInterval(tick, 40);
};
};
})();
window.onload = function() {
getMore($id("wrap"),"mode");
};
var re;
var so;
window.onresize = function() {
clearTimeout(re);
re = setTimeout(resize,100);
}
function resize(){
$id("wrap").className = "wrap active";
sortAll($id("wrap"),"div");
}
window.onscroll = function(){
var a=document.body.scrollHeight;
var b=document.documentElement.clientHeight;
var c=document.documentElement.scrollTop + document.body.scrollTop;
//$id("aaa1").innerHTML=a+"xxx"+b+"xxx"+c;
if((c+b>=a)&&isAjax==0){
isAjax=1;
getMore($id("wrap"),"mode");
}
else {return}
}
</script>
<div id="aaa1" style="display:none;position: fixed;width:400px;height:200px;background:#000;color:#fff;top:30%;left:50%"></div>
</html>
更多内容 请参考我的个人博客 http://ismartstudio.com/
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