Why does my jQuery queue stop working after executing once?_问答_开发者

Okay, so my goal is to make a simple animation where a domino moves from the front of a pile to the back, when it is clicked.

I have something that works here: http://jsfiddle.net/Kirkman/tDmHE/

But this consists of big series of nested callbacks, and eventually I will have a lot more than five dominoes. So then I learned that jQuery's queue could help me keep my code cleaner and not have to nest all those callbacks.

Here's what I came up with. But it only works the first time you click: http://jsfiddle.net/Kirkman/R7TmU/8/

What I cannot figure out is why it will not work subsequent times.

Here are the relevant JS functions:

    function dominoSlide(theThis) {
        $('#dominoes .nav ul li').removeClass('selected',500);
        var thisDomino = theThis.parent();
        $('#dominoes .nav ul').queue(function() {
            thisDomino.switchClass('domino0','selected', 250);
            $('.domino1').switchClass('domino1','domino0',10);
            $('.domino2').switchClass('domino2','domino1',10);
            $('.domino3').switchClass('domino3','domino2',10);
            $('.domino4').switchClass('domino4','domino3',10);
            thisDomino.addClass('domino4');
            thisDomino.removeClass('selected',250);
            resetHandlers();
        });
    }


    function resetHandlers() {
        $('#dominoes .nav ul li a').unbind();

        $('.domino0 a').bind('click', function(event)开发者_运维问答 {
            var theThis = $(this);
            dominoSlide(theThis);
            event.preventDefault();
        });

        $('#dominoes .nav ul li:not(".domino0") a').bind('click', function(event) {
            event.preventDefault();
        });

    }

<!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>
    <title></title>
    <script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script type="text/javascript" src="Scripts/jquery-ui-1.8.16.min.js"></script>
    <!-- <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js"></script>-->
    <script type="text/javascript">

        $(document).ready(function () {
            var dominoesHtml = $('.nav').clone().html();

            $('.story div').hide();

            $('.domino0 a').live('click', function (event) {
                var obj = $(this).parent();

                $('#dominoes .nav ul li').removeClass('selected', 500);
                obj.switchClass('domino0', 'selected', 250);
                $('.domino1').switchClass('domino1', 'domino0', 10);
                $('.domino2').switchClass('domino2', 'domino1', 10);
                $('.domino3').switchClass('domino3', 'domino2', 10);
                $('.domino4').switchClass('domino4', 'domino3', 10);
                obj.addClass('domino4');
                obj.removeClass('selected', 250);

                event.preventDefault();
            });

            $('button#btnReset').click(function () {
                $('.nav').html(dominoesHtml);
            });
        });    
    </script>
    <style type="text/css">
        body
        {
            padding: 10px;
        }

        #dominoes
        {
            padding: 0px;
            width: 620px;
            position: relative;
            background-color: #eee;
        }

        #dominoes .nav ul
        {
            list-style: none;
            margin: 0px;
            padding: 0px;
            position: relative;
        }

        #dominoes .nav ul li
        {
            display: block;
            position: absolute;
            width: 113px;
            top: 0px;
        }

        .domino0
        {
            left: 0px;
            z-index: 1000;
        }
        .domino1
        {
            left: 30px;
            z-index: 98;
        }
        .domino2
        {
            left: 60px;
            z-index: 96;
        }
        .domino3
        {
            left: 90px;
            z-index: 94;
        }
        .domino4
        {
            left: 120px;
            z-index: 92;
        }

        .was0
        {
            background-color: red;
        }
        .was1
        {
            background-color: purple;
        }
        .was2
        {
            background-color: blue;
        }
        .was3
        {
            background-color: green;
        }
        .was4
        {
            background-color: yellow;
        }


        #dominoes .nav ul li.hovered
        {
            padding-left: 50px;
        }


        #dominoes .nav ul li.selected
        {
            left: 506px;
            z-index: 1000;
        }

        .story
        {
            position: absolute;
            top: 250px;
        }

        button
        {
            position: absolute;
            top: 300px;
        }
    </style>
</head>
<body>
    <div id="dominoes">
        <div class="nav">
            <ul>
                <li class="domino0 was0"><a href="xxx">
                    <img src="http://dl.dropbox.com/u/27409695/images/domino.png" />q</a></li>
                <li class="domino1 was1"><a href="xxx">
                    <img src="http://dl.dropbox.com/u/27409695/images/domino.png" />q</a></li>
                <li class="domino2 was2"><a href="xxx">
                    <img src="http://dl.dropbox.com/u/27409695/images/domino.png" />q</a></li>
                <li class="domino3 was3"><a href="xxx">
                    <img src="http://dl.dropbox.com/u/27409695/images/domino.png" />q</a></li>
                <li class="domino4 was4"><a href="xxx">
                    <img src="http://dl.dropbox.com/u/27409695/images/domino.png" />q</a></li>
            </ul>
        </div>
        <button id="btnReset">
            Reset handlers
        </button>
    </div>
</body>
</html>