On iPhone or iPad, only front camera

[numerique-mood]

Hello !
First of all, many thanks for your incredible plugin! I discovered it and wanted to play with QR codes. But on the iPhone and iPad I only have the front camera (even if I choose the back camera). I am on Moodle 3.10.3 with the latest version of Treasure Hunt. It works with the front camera but it is not very practical.
Regards,
Sébastien

[juacas]

Hi, thanks for your kind words.
Unfortunatelly, I don't have any Apple device to test that issue and I'll need some help for the community to solve this bug.
The problem seems to start in line

moodle-mod_treasurehunt/amd/src/webqr.js

Line 191 in 5ef4840

Instascan.Camera.getCameras().then(function (cameras) {

that completely relies on the instascan library.

Please, test with your iPhone the demo at: https://schmich.github.io/instascan/ and check if you can use both cameras of your device.

[numerique-mood]

Hi, thanks for your feedback.
I just try the link in your previous post with my iPhone and it works like on my Moodle : it discovers the 2 cameras (front and back) but when I choose front or back it's always the front camera that I see. QR codes are recognized in the 2 ways.

[juacas]

Je suis vraiment désolé.

Can you repeat the same check using Chrome instead of Safari?
Nevertheless, I've marked this issue as "help wanted".

At least the QR functionality is usable although not confortably.

[numerique-mood]

Thanks for you few words in French ! 👍
I just test on my iPhone with Chrome and Firefox and it doesn't change anything.
It's not a big problem as at least one camera works and can read the QR codes. Unfortunaly I'm just a Moodle user and not a developer, so I can't help you, I can only test and tell you what I see.

[LRequin]

Hi @juacas. I hope to find you well. Same issue for me and this is a deal (heart)breaker for me as the game would be played indoors and the activity MUST work on all platforms.
I looked at the library you use to scan the QR code "webqr.js". There is an open issue on their Github page: Doesnt work in Iphone devices #100. The code has not been updated since 2017 and the dev does not seem to respond. What about using another QR code scanner library? I am not a developer but skimming Github it looks like there are javascript based Qr code readers out there that are maintained and trusted like VueQrCode reader, which works on iOS 15.5.