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,null); save_link.dispatchEvent(event); };