My iphone 15 won't scan QR codes

No, it IS up to the app developer.

The framework and iOS have no problem reading the codes, it's the insistence of the app developer at having the code or ID fill the frame they set aside without using the zoom parameters mentioned in the video to change how it appears to the user.

The app developer erroneously requires the ID to fill their frame, and that's what needs to be fixed.

There are multiple app developers whose apps work just fine this way; Amazon and Walmart (to use Walmart Pay) are but two.

If you download and play with Scandit you can see how far away you can be and have bar code reading work.

https://apps.apple.com/us/app/scandit-barcode-scanner/id453880584

Newer iPhones don't have focus issues, either.

1) The minimum focus distance for the new phones is further away than it was for the iPhone 6 and its inferior sensor and lens.

2) Stop trying to scan a bar code from so close; you can scan it from amazingly far away and it will scan, perfectly.

3) If your app doesn't work, it's because the app vendor didn't follow the instructions Apple gave developers in 2021 as to how to properly use the scan/zoom API on devices with higher minimum focus distances.

The list of apps that can scan properly with zero issues on the iPhone 13/14/15 Pro/Pro Max is endless - Amazon, Apple, Safeway, Scandit, Walgreens, Walmart and more.

It's not a "failure" in any way because there is nothing for Apple to fix; it's working 100% correctly and as designed.

It works perfectly, just hold the phone further away from the object you are scanning, typically about 7.7".

Do not hold the code close to the phone, the normal lens can't focus on anything less than 7.7" away and so will not read the bar code.

The bar or QR code does not need to fill a box for the code if the app provides one.

There's no need to tap to focus or anything else.

If you want to experiment with scanning different types of codes, I recommend you try the free Scandit app:

https://apps.apple.com/us/app/scandit-barcode-scanner/id453880584

I scan bar codes and QR codes daily with my 15 Pro Max, and also use the Amazon, Target and Walmart apps which all do bar code scanning with no issues whatsoever.

Neither the iPhone 15 nor older phones switch to the macro lens.

The normal lens is always used for reading codes, you just need to have the code far enough away that it can be focused upon.

The recommended API has been the same since at least the iPhone 12:

What’s new in camera capture - WWDC21 - Videos - Apple Developer

There is no bug to address.

The Camera app can go into macro mode and it can scan QR codes, but third-party apps do not need to do so.

Apps from Amazon and Walmart, to name two, scan codes without going into macro mode, there's simply no need to.

This third-party app does an excellent job of scanning codes with just the normal lens:

https://apps.apple.com/us/app/scandit-barcode-scanner/id453880584

I have the same issues i thoughts with the new iphone 15 pro it will be resolved but unfortunately i cannot scan any barcorde except the QR CODE BIG FORMAT

My iPhone 15 Pro Max is very bad at scanning bar codes. Very difficult to use for grocery shopping. Come on Apple sort this issue!!!

The iPhone 12 had a completely different camera system with a different minimum focus distance.

You don't need to adjust zoom, and you do not need to fill whatever box is drawn by the app with the code.

Simply hold the phone far enough away that it can focus on the bar code or QR code and it will just scan.

This is an example; I placed a jar of peanut butter on the ground to see how small the bar code could be and it would still be readable, and this is an example; it was taken from a video, so it's a bit blurrier than a still would be:

iPhone, 15 is horrible to focus on QR codes or barcodes. I don’t know if it’s the phone or the OS. I’m tempted to go back to my old XS phone because I had no issues then.

Phone scanning style is already in auto mode…..does not work. Also tried manual scanning and single switch step scanning and still does not work.

See attached Keynote video I put together….. it’s not the app but the phone.

https://youtu.be/xRfCr3pM6dw

There's nothing to update.

If you hold a code closer than the phone's minimum focus distance, it can't focus on it to read the code.

Keyword “shouldn’t”. Camera just doesn’t work as expected during some in-app scanning.

Then contact the app's author.

For example, the Walmart app does not support tap to focus but does properly scan the Walmart Pay code on the register.

I am having the exact problem, ever since I got the iPhone 15. Never had an issue with past IPhones. I wish I never upgraded.