Is there a way to observe the currentEDRHeadroom property of UIScreen for changes? KVO is not working for this property... I understand that I can query the current headroom in the draw(...) method to adapt the rendering. However, our apps only render on-demand when the user changes parameters. But we would also like to re-render when the current EDR headroom changes to adapt the tone mapping to the new environment. The only solution we've found so far is to continuously query the screen for changes, which doesn't seem ideal. It would be better if the property would be observable via KVO or if there would be a system notification to listen for. Thanks!

Hi. I'm using Xcode Version 13.4.1. I have a project that builds an iOS app successfully in Xcode cloud. However, I am getting errors when trying to execute the archiving action. It seems archiving for app-store distribution works but fails archiving for development distribution and ad-hoc distribution. I only need the archive for app-store distribution and so what is the way to disable archiving for the other two ? Also, is there any way to provide a custom export options plist ?

Hi, great to have more options about EDR on iOS, useful session. Q1: There is a related feature that we'd like to replicate in our photo app Hydra 2. When shooting a JPG with the built-in camera app and showing it in Photos, bright area go beyond the 1.0 SDR brightness level. How can we replicate this behavior (we have the > 1.0 data internally in our app) to generate a JPG than will go > 1.0 in the Photos app? (we generate the JPG ourselves for various reasons/features, it is not made by AVFoundation APIs). Q2: we use CATiledLayer in some part of our app, which is limited to SDR content (1.0) in iOS 15. Does it or will it get EDR capability in iOS 16 for HDR content, or is a CAMetalLayer based reimplementation still the recommendation? Thank you. Raphael