Question

我正在尝试使用localstorage为ipad应用创建测验。我成功地创建了一个测验，记住你点击的选项，我可以检查答案是否正确。

但是，对于某些问题，有多个答案，我希望能够将多个答案存储为该问题的数组。

我的测验目前将答案存储在由父div的类命名的键下。答案取决于您点击的LI。请参阅下面的代码。

我希望能够为每个问题存储多个答案的选项，我将如何根据我的代码执行此操作？我是javascript的新手。

    <!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

要在localStorage中存储多个值，您可以将它们放入一个对象中，JSON.stringify将它作为localStorage的值：

    var answersObject = {
      answer1: 'yes',
      answer2: 'no',
      answer3: 'maybe'
    };

    localStorage.setItem(question, JSON.stringify(answersObject));

要从localStorage取回它们，您应该使用JSON.parse

    storedObject = JSON.parse(localStorage.getItem(question));

现在，您可以按storedObject.answer1，storedObject.answer2等方式获得答案。

在localStorage中存储多个选项以进行测验

1 个答案: