WeChat QR code long press recognition problem, WeChat two-dimensional Recognition

Two-dimensional Recognition

When you create an H5 page, you can add a QR code below to enable and hold the image on your android server and then recognize it,

However, in the Apple system, it is useless to press the button. The QR Code cannot be identified.

One line of code is used for troubleshooting. I have read a lot of materials and I still think there is a deviation in the height of the calculated image. This may be related to parsing CSS styles, the height of the image on the screen cannot be calculated correctly, leading to problems in recognition.

After the adjustment, I found that the margins of the QR code image must be sufficient, and it is generally caused by the gap between upper and lower. I kept a large space between the upper and lower sides and centered the picture of the QR code, if you do not want to leave it blank, you can also put some image text and so on to avoid leaving it blank.

For example: