本文给大家介绍ajax如何实现点击加载更多数据图片（预加载）效果的，有一定的参考价值，有需要的朋友可以参考一下，希望对你们有所帮助。
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>ajax点击加载更多数据--博客园--勇淘未来</title> <script type="text/javascript" src="jquery-1.11.1.min.js"></script> <style> *{padding:0;margin:0;} .box {margin: 100px auto;width: 550px;} ul li {width:550px;list-style: none;} ul li span{text-align:center;display:block;} .clear {clear: both;} .load {text-align: center;display: none;margin-top:50px;color:#ccc;} .end{display:none;color:#ccc;} </style> </head> <body> <div class="box"> <ul></ul> <div class="clear"></div> <div class="load">加载中...</div> <div class="more" style="text-align: center;margin-top:50px;"> <button class="btn">查看更多图片</button> <div class="end">没有更多了</div> </div> </div> <script> var num = 0; var start = 0; var size = 2; $.ajax({ url: "dataNews.json", type: "get", success: function(res){ var str = ""; for(var i = 0;i < 2;i++){ str += "<li><img src=" + res[i].img + "><span>"+ res[i].title +"</span></li>"; } $(".box ul").append(str); }, error:function(){ console.log(errors); } }) $(".btn").click(function(){ $(".load").show(); setTimeout(function(){ $(".load").hide(); num++; console.log(num); start = num * size; $.ajax({ url:"dataNews.json", type:"get", success:function(res){ var sum = res.length; if(start + size > sum) { size = sum - start; $(".btn").css("display","none"); $(".end").css("display","block"); } var str = ""; for(var i = start;i<(start + size);i++) { str += "<li><img src=" + res[i].img + "><span>"+ res[i].title +"</span></li>"; } console.log(start + size); $("ul").append(str); } }); },300) } ) </script></body></html>本地测试dataNews.json文件:
[ { "img":"img/sina.jpg","title":"百度音乐1"}, { "img":"img/tengxu.jpg","title":"百度音乐2"}, { "img":"img/sina.jpg","title":"百度音乐3"}, { "img":"img/tengxu.jpg","title":"百度音乐4"}, { "img":"img/tengxu.jpg","title":"百度音乐5"}, { "img":"img/sina.jpg","title":"百度音乐6"}, { "img":"img/tengxu.jpg","title":"百度音乐7"}, { "img":"img/sina.jpg","title":"百度音乐8"}, { "img":"img/tengxu.jpg","title":"百度音乐9"}, { "img":"img/sina.jpg","title":"百度音乐10"}, { "img":"img/tengxu.jpg","title":"百度音乐11"}, { "img":"img/sina.jpg","title":"百度音乐12"}, { "img":"img/tengxu.jpg","title":"百度音乐13"}, { "img":"img/sina.jpg","title":"百度音乐14"}, { "img":"img/tengxu.jpg","title":"百度音乐15"}]点击更多图片，加载2条数据，当数据加载完了，就显示 “没有更多了”
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