簡單分為三個文檔，有詳細的注釋：img；ajax.php；demo.php
其中img檔案夾中放入圖片 1.jpg；2.jpg;3.jpg....
ajax.php頁面
<?php //類比從資料庫讀取資料 $arr = array(); $op = opendir('./img'); //開啟目錄 //迴圈讀取目錄 while (($file = readdir($op)) !== false) { //過濾點和點點 if ($file == '.' || $file == '..') { continue; } $arr[] = $file; } closedir($op); //關閉目錄 echo json_encode($arr);
demo.html頁面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>瀑布流</title> <style> li{ list-style: none; float: left; margin:4px; } img{ border:4px solid black; } </style></head><body> <ul id="ul"> <!-- <li><img src="./img/1.jpg" height="300" alt=""></li> --> </ul></body><script> //找對象 var ul = document.getElementById('ul'); //拿資料 function getData() { var ajax = new XMLHttpRequest(); ajax.open('get', 'ajax.php', true); ajax.send(); ajax.onreadystatechange = function() { if (ajax.readyState == 4 && ajax.status == 200) { var res = ajax.responseText; //處理結果 var obj = JSON.parse(res); for (var k in obj) { // obj[k]; //建立節點 var li = document.createElement('li'); li.innerHTML = '<img src="./img/'+obj[k]+'" height="300" />'; ul.appendChild(li); } } } } getData(); var timer; //判斷捲軸的高度，載入第二批檔案 window.onscroll = function() { //擷取三高 var zGao = document.documentElement.scrollHeight;//總高度 var lGao = document.documentElement.clientHeight;//瀏覽器可用高度 var gGao = document.body.scrollTop || document.documentElement.scrollTop;//滾出去的高度 // console.log(zGao, lGao, gGao); document.title = zGao + '_' + lGao + '_' + gGao; if (zGao - lGao - gGao < 500) { clearTimeout(timer); //用一次性定時器解決連續載入的問題 timer = setTimeout(function(){ getData(); }, 200) } }</script></html>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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