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用 QRCode 生成二维码图片，第一次进入页面图片不显示，刷新一下就好了

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用 QRCode 生成二维码图片，第一次进入页面图片不显示，刷新一下就好了

第一次进入是这个样子的
image
——————————————————————————
下面是刷新之后的，能够正常显示
image

下面是我二维码的代码，不显示图片的时候，http链接是有的，而且是正常的
image

为什么会出现这样的情况？求告知，谢谢了


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by (71.8m points)

你的二维码需要在第一次请求成功后，立即回调


与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
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