如何从字符串类型在React中显示QR码图像

Question

我有二维码的字符串类型，像这样：

"data:image/png;base64,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

我不确定如何根据 字符串类型 .

在 React 中显示 QR 码

Answer 1

只需使用如下所示的 img 标签：


let img =
  'data:image/png;base64,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';

<img src={img}/>

Answer 2

如果Qr_code每次都会改变，你可以这样使用：

 <img    src={`data:image/png;base64,${qr_code}`}/>

qr_code 是每次都会更改的值，因此您每次都可以生成一个新的 QRcode

如何从字符串类型在React中显示QR码图像

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