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This time I will bring you JS to generate a QR code from a link PictureMethod analysis, what are the precautions for JS to generate a link to a QR code picture, the following is a practical case , let’s take a look.
<p id="code"></p> <img id="img"/> <script type="text/javascript"> var qrcode=$("#code").qrcode({ render:'canvas||table', width: 200, //宽度 height:200, //高度 text: "http://www.baidu.com" //任意内容 }).hide(); var canvas=qrcode.find('canvas').get(0); //如果有循环,此句必不可少 qrcode.find('canvas').remove(); var data = canvas.toDataURL('image/jpg'); $('#img').attr('src',data) ; saveFile(data,"fd范德萨范德萨"); //转为图片的方法,需要上门的data function saveFile(data,filename){ var save_link=document.createElementNS('http://www.w3.org/1999/xhtml', 'a'); save_link.href=data; save_link.download=filename; var event=document.createEvent('MouseEvents'); event.initMouseEvent('click',true,false,window,0,0,0,0,0,false,false,false,false,0,null); save_link.dispatchEvent(event); }; </script>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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