使用qrcode.js生成随机QR码OnClick [英] Generate Random QR Code OnClick Using qrcode.js

问题描述

我正在使用 qrcode.js 生成qrcode.我想每次点击进入添加新标签"而不是添加新的二维码时都生成随机QR码.我为随机数创建了代码，但是当我尝试添加onclick函数时，它会添加新内容而不是随机数.

JSFIDDLE: https://jsfiddle.net/aice09/L8pp9336/
GITHUB: https://github.com/Ailyn09/project102/blob/master/qrcode.html
CODEPEN: https://codepen.io/aice09/pen/Ogqajr

  $('#lithird').click(function(){var qrcode = new QRCode("qrcode");函数makeCode(){函数randomNumber(len){var randomNumber;var n ='';for(var count = 0; count  

  #qrcode {宽度:160像素；高度:160像素；margin-top:15px;}  

 <脚本src ="https://code.jquery.com/jquery-1.12.3.min.js"><;/script>< script src ="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>< script src ="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"</script>< link href ="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel ="stylesheet"/>< div class ="container-fluid" id ="main">< ul class ="nav nav-tabs" role ="tablist">< li role ="presentation" id ="lifirst" class ="active">< a href =#home" aria-controls ="home" role ="tab" data-toggle ="tab">List</a>/li>< li role ="presentation" id ="lithird">< a href =#editable" aria-controls ="editable" role ="tab" data-toggle ="tab" onclick ='transfer_new()'>添加新</a</li></ul><！-/导航标签/-><！-标签窗格->< div class ="tab-content">< div role ="tabpanel" class ="tab-pane active" id ="home" style ="margin-top:10px;">在下一个塔巴AR代码中</div>< div role ="tabpanel" class ="tab-pane" id ="editable">< div class ="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">< div id ="qrcode"></div></div> =</div></div></div>  

解决方案

尝试添加 $('#qrcode').html(''); 作为中的第一项.click(function(){}

赞:

  $('#lithird').click(function(){$('#qrcode').html('');//< ---添加此内容，下次单击时应将其清除var qrcode = new QRCode("qrcode");函数makeCode(){函数randomNumber(len){var randomNumber;var n ='';for(var count = 0; count  

Codepen进行全面审核

I am using qrcode.js for generating qrcode. I want to generate random QR code every time I click into add new tab instead of add new qr code. I created a code for a random number but when I try to add onclick function it add new not to random it.

JSFIDDLE: https://jsfiddle.net/aice09/L8pp9336/
GITHUB: https://github.com/Ailyn09/project102/blob/master/qrcode.html
CODEPEN: https://codepen.io/aice09/pen/Ogqajr

$('#lithird').click(function() {

    var qrcode = new QRCode("qrcode");

    function makeCode() {

        function randomNumber(len) {
            var randomNumber;
            var n = '';

            for (var count = 0; count < len; count++) {
                randomNumber = Math.floor(Math.random() * 10);
                n += randomNumber.toString();
            }
            return n;
        }

        var value = randomNumber(13);

        var elText = value;

        qrcode.makeCode(elText);
    }

    makeCode();

});    

#qrcode {
  width:160px;
  height:160px;
  margin-top:15px;
}

<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid" id="main">
    <ul class="nav nav-tabs" role="tablist">
        <li role="presentation" id="lifirst" class="active"><a href="#home" aria-controls="home" role="tab" data-toggle="tab">List</a></li>
        <li role="presentation" id="lithird"><a href="#editable" aria-controls="editable" role="tab" data-toggle="tab" onclick='transfer_new()'>Add New</a></li>
    </ul>
    <!--/ Nav tabs /-->

    <!-- Tab panes -->
    <div class="tab-content">
        <div role="tabpanel" class="tab-pane active" id="home" style="margin-top:  10px;">
            IN THE NEXT TABA THE AR CODE
        </div>
        <div role="tabpanel" class="tab-pane" id="editable">

            <div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">
                <div id="qrcode"></div>
            </div>=
        </div>
    </div>
</div>

解决方案

Try adding $('#qrcode').html(''); as the first item in the .click(function(){}

Like this:

$('#lithird').click(function(){      

    $('#qrcode').html('');  // <---Add this, which should clear it out on the next click

    var qrcode = new QRCode("qrcode");

    function makeCode () {      

        function randomNumber(len) {
        var randomNumber;
        var n = '';

        for(var count = 0; count < len; count++) {
            randomNumber = Math.floor(Math.random() * 10);
            n += randomNumber.toString();
        }
        return n;
    }

    var value = randomNumber(13);
        var elText = value;

        qrcode.makeCode(elText);
    }

    makeCode();

});

Codepen for full review

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