点赞效果

<!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>无标题文档</title>
</head>

<body>
<div class="opera">
    <span id="btn">
        <i class="iconfont"></i> 点击
    </span>
</div>
<script src="http://icon.xcar.com.cn/2014/template/js/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
(function ($) {
    $.extend({
        tipsBox: function (options) {
            options = $.extend({
                obj: null,  //jq对象，要在那个html标签上显示
                str: "+1",  //字符串，要显示的内容;也可以传一段html，如: "<b style='font-family:Microsoft YaHei;'>+1</b>"
                startSize: "12px",  //动画开始的文字大小
                endSize: "30px",    //动画结束的文字大小
                interval: 600,  //动画时间间隔
                color: "red",    //文字颜色
                callback: function () { }    //回调函数
            }, options);
            $("body").append("<span class='num'>" + options.str + "</span>");
            var box = $(".num");
            var left = options.obj.offset().left + options.obj.width() / 2;
            var top = options.obj.offset().top - options.obj.height();
            box.css({
                "position": "absolute",
                "left": left + "px",
                "top": top + "px",
                "z-index": 9999,
                "font-size": options.startSize,
                "line-height": options.endSize,
                "color": options.color
            });
            box.animate({
                "font-size": options.endSize,
                "opacity": "0",
                "top": top - parseInt(options.endSize) + "px"
            }, options.interval, function () {
                box.remove();
                options.callback();
            });
        }
    });
})(jQuery);
  
function niceIn(prop){
    prop.find('i').addClass('niceIn');
    setTimeout(function(){
        prop.find('i').removeClass('niceIn');    
    },1000);        
}
$(function () {
    $("#btn").click(function () {
        $.tipsBox({
            obj: $(this),
            str: "+1",
            callback: function () {
            }
        });
        niceIn($(this));
    });
});
</script>
</body>
</html>
点赞效果

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