jQuery+ajax实现文章点赞功能的方法_H5之家 - 中国HTML5教程资源分享第一站

本文实例讲述了jQuery+ajax实现文章点赞功能的方法。分享给大家供大家参考，具体如下：

前几日有童鞋问我索要本站右上角的点赞功能，麦葱左思右想，决定把这功能分享出来,希望此功能对各位会带来方便哦。

代码很简单，jQuery+php实现的。

jQuery代码：

jQuery(document).ready(function($) { $(".zan").click(function(e){ var $i=$(".zan i"), $b=$("<b>").text("+1"), n=parseInt($i.text()); $b.css({ "bottom":0, "z-index":999, }); $i.text(n+1); $(".zan").append($b); $b.animate({"bottom":100,"opacity":0},1000,function(){$b.remove();}); var d = setInterval(function(){ clearInterval(d); if($(".zan b").length == 1){ $.post("",{zan:$i.text()}) } },1000) e.stopPropagation(); }); });

php代码：

<?php $path = "zan.txt"; if(isset($_POST['zan'])){ $num = (int)$_POST['zan']; $save = fopen($path,"w"); fwrite($save,$num); fclose($save); echo "good"; exit(); $zan = file_exists($path) ? intval(file_get_contents($path)) : 0; } ?>

html代码：

<div class="main"> <div class="zan"><em>看官们给了 <i><?php echo $zan; ?></i> 个赞</em></div> </div>

配上合适的css样式：

.main { position: relative; font-size: 10pt; line-height: 18px; margin: 40px auto; width: 800px; height: 170px; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; -o-user-select: none; user-select: none;} .zan { position: absolute; top: 20%; left: 45%; width: 160px; height: 110px; background: url("zan.jpg") center no-repeat; cursor: pointer; opacity: 0.85; } .zan:active { opacity: 1; } .zan em { position: absolute; color: #333; font-style: normal; bottom: -15px; width: 100%; text-align: center; } .zan i { font-style: normal; color: #E94F06; } .zan b { position: absolute; color: #E94F06; font-style: normal; bottom: -15px; width: 100%; text-align: center; }

就是这样，简单吧！

下面是完整代码：

<?php $path = "zan.txt"; if(isset($_POST['zan'])){ $num = (int)$_POST['zan']; $save = fopen($path,"w"); fwrite($save,$num); fclose($save); echo "good"; exit(); } $zan = file_exists($path) ? intval(file_get_contents($path)) : 0; ?> <!doctype html> <html> <head> <meta charset="utf-8"> <title>我要点赞</title> <style> .main { position: relative; font-size: 10pt; line-height: 18px; margin: 40px auto; width: 800px; height: 170px; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; -o-user-select: none; user-select: none;} .zan { position: absolute; top: 20%; left: 45%; width: 160px; height: 110px; background: url("zan.jpg") center no-repeat; cursor: pointer; opacity: 0.85; } .zan:active { opacity: 1; } .zan em { position: absolute; color: #333; font-style: normal; bottom: -15px; width: 100%; text-align: center; } .zan i { font-style: normal; color: #E94F06; } .zan b { position: absolute; color: #E94F06; font-style: normal; bottom: -15px; width: 100%; text-align: center; } </style> </head> <body> <div class="main"> <div class="zan"><em>看官们给了 <i><?php echo $zan; ?></i> 个赞</em></div> </div> <script src="jquery.min.js"></script> <script> jQuery(document).ready(function($) { $(".zan").click(function(e){ var $i=$(".zan i"), $b=$("<b>").text("+1"), n=parseInt($i.text()); $b.css({ "bottom":0, "z-index":999, }); $i.text(n+1); $(".zan").append($b); $b.animate({"bottom":100,"opacity":0},1000,function(){$b.remove();}); var d = setInterval(function(){ clearInterval(d); if($(".zan b").length == 1){ $.post("",{zan:$i.text()}) } },1000) e.stopPropagation(); }); }); </script> </body> </html>

标题都说了是无上限点赞的，So，麦葱告诉大家个小诀窍：

/* 怒赞 */ jQuery.noConflict(); function zan() { setInterval(function () { jQuery(".zan").click(); zan(); }, 600) } zan();

当然，如果你使用了加速乐防CC（麦葱就是），怒赞请求量过多，会被屏蔽掉哦！除非你取消掉jQuery里的POST

希望本文所述对大家jQuery程序设计有所帮助。