使用来自 javascript 的输出 base64 创建 qrCode
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Create qrCode with output base64 from javascript
提问by Reinstar
I want to create qr-code with output base64 string from javascript.
我想用来自 javascript 的输出 base64 字符串创建 qr 代码。
I found http://davidshimjs.github.io/qrcodejs/for generate qr-code. That I want is get base64 string from this awesome tools.
我发现http://davidshimjs.github.io/qrcodejs/用于生成二维码。我想要的是从这个很棒的工具中获取 base64 字符串。
回答by Andrey Vaganov
Much more better and clear solution with http://neocotic.com/qr.js
使用http://neocotic.com/qr.js 提供更好更清晰的解决方案
qr.toDataURL(yourAwesomeData); //yourAwesomeData in Base64
回答by Sébastien Barré
you can get the Base64 directly from the generated variable, i.e.:
您可以直接从生成的变量中获取 Base64，即：
/*generate QRCode*/
var qrcodjs = new QRCode("qrcode", {
text: orderData.reference,
width: 128,
height: 128,
colorDark: "#000000",
colorLight: "#ffffff",
correctLevel: QRCode.CorrectLevel.H
});
/*get base64*/
var imgBase64Data = qrcodjs._el.childNodes[4].currentSrc;
This will work unfortunately only on google chrome or Firefox... for IE or Safari you will have to use:
不幸的是，这仅适用于 google chrome 或 Firefox ... 对于 IE 或 Safari，您必须使用：
var imgBase64 = qrcodjs._oDrawing._elImage.currentSrc;
if (typeof imgBase64 === "undefined")
imgBase64 = qrcodjs._oDrawing._elImage.href;
if (typeof imgBase64 === "undefined")
imgBase64 = qrcodjs._oDrawing._elImage.src;
回答by contributorpw
May be you can get this code d-project.googlecode.com
也许你可以得到这个代码d-project.googlecode.com
And replace last strings
并替换最后一个字符串
from
从
var img = '';
img += '<img';
img += '\u0020src="';
img += 'data:image/gif;base64,';
img += base64;
img += '"';
img += '\u0020width="';
img += width;
img += '"';
img += '\u0020height="';
img += height;
img += '"';
if (alt) {
img += '\u0020alt="';
img += alt;
img += '"';
}
img += '/>';
to
到
var img = 'data:image/gif;base64,' + base64;
Getting a base64
获取 base64
var qr = qrcode(4, 'M');
qr.addData('This is base64 string');
qr.make();
concole.log(qr.createImgTag());
