Question

我目前正在记录li的点击并使用localStorage存储它的内容。

我有一个测验问题，有多个选择答案，目前存储了他们所选择的答案，但如果他们改变了主意，就会用他们点击的内容覆盖它。

这适用于单选问题，但对于允许多个答案的问题，这将不起作用。

我需要做的是能够记录所有点击并将它们存储为数组。

这是我现有的代码：

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>test</title>

<style type="text/css">

body{
    text-align: center;
}

#questions{
    margin: 0 auto;
    width: 802px;
    height: 602px;
}

/*look for any class that has the word slide in it*/
[class*="slide"]{
    padding: 20px;
    background: #666;
    width: 760px;
    height: 560px;
    border: 1px dashed #333;
}
[class*="slide"]:nth-child(odd){
    background: #999;
}

b{
    position: absolute;
    top: 10px;
}


</style>

</head>

<body>
    <div id="questions">
        <div class="slide1">
            <h1>What is h2o?</h1>
            <ul>
                <li>A Pencil</li>
                <li>Liquid water</li>
                <li>A mobile phone network</li>
                <li>Paper</li>
            </ul>
            <p>check</p>
        </div>
        <div class="slide2">
            <h1>What is 2 + 2?</h1>
            <ul>
                <li>1</li>
                <li>2</li>
                <li>3</li>
                <li>4</li>
            </ul>
            <p>check</p>
        </div>
        <div class="slide3">
            <h1>What is a whale?</h1>
            <ul>
                <li>A mammal</li>
                <li>A fish</li>
                <li>A bird</li>
                <li>A country</li>
            </ul>
        </div>
        <div class="slide4">
            <h1>What phone do you prefer?</h1>
        <ul>
                <li>iPhone 4s</li>
                <li>iPhone 5</li>
            </ul>
        </div>
        <div class="slide5">
            <h1>What is 5 + 5?</h1>
            <ul>
                <li>10</li>
                <li>7</li>
            </ul>
        </div>
        <div class="slide6">
            <h1>What is the capital city of England?</h1>
            <ul>
                <li>London</li>
                <li>Staines</li>
                <li>Bognor Regis</li>
                <li>Luton</li>
            </ul>
        </div>
        <div class="slide7">
            <h1>What colour is a red phone box?</h1>
            <ul>
                <li>Blue</li>
                <li>Red</li>
                <li>Pink</li>
                <li>Mauve</li>
            </ul>
        </div>
    </div>
    <b></b>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

<script type="text/javascript">

$(document).ready(function() {

    /*
    //
    //  quiz storer and answer checker
    //  Author: Tjobbe Andrews
    //  v1.0, 13/02/2013
    //  - keeps a record in localStorage of the answers you chose, then checks them on an ad hoc basis
    //
    */

    //on clicking the answers in the li's..
    $("li").click(function(){
        //..create a variable called answer based on the content of that li..
        var answer = $(this).html();
        //..and create a variable called question based on the class of the parent div
        var question = $(this).parent().parent().attr("class");
        //then store the key value pair of question and answer
        localStorage.setItem(question, answer);
        //just makes sure that it's writing to the LS db
        $("b").html(localStorage.getItem(question));
    });

    //click the p tag to check what we've got stored for this div - ad hoc
    $('p').click(function(){
        var slideNumber = $(this).closest('div').attr('class');
        var answer = localStorage.getItem(slideNumber);
        if(answer !== "Liquid water"){
            alert('wrong');
        }
        else if(answer == "Liquid water"){
            alert("right");
        }
    });

});
</script>

</body>
</html>

Answer 1

您不能将数组存储在localStorage中，但您可以轻松地将数组转换为JSON字符串并存储该数组。如果您的浏览器支持它，您可以使用JSON.stringify和JSON.parse。否则，请下载JSON库。

将多次点击记录为数组

1 个答案: