So to enable and disable the effect, in my case, I need to track which header is pinned to the top, and call _setActive: on the interactions of the header views to only enable for the top one. I extended UICollectionViewLayoutAttributes with a fields for this.

And it works.

If you create an _UIScrollPocketContainerInteraction instance and add it to the view, it actually works. But it creates an amusing effect where all glass effects are synchronized.

An Apple UICollectionViewLayout subclass vs a custom one. Notice the header visual effect view's glass is "synchronized" with the navigation bar, making them switch appearance together. No way there is a UIGlassContainerEffect in there somewhere.

Photos on iOS 26 does not use the public bottomAccessory/UITabAccessory API, yet is able to detect when the tab bar minimizes and make that bar fade in and out. Inspecting the hierarchy shows it's just a UIView subclass. So how does it know when the tab bar minimizes?

Xcode is a buggy, retarded mess. Pause once, and you get disassembly for each stack frame. Pause a second time, and Xcode is broken. It's not lldb, as `disassemble` produces the correct output. How is that team so incompetent? Then again, what isn't at Apple these days?

People on Black Friday:

Now this is the React Native I love to hate. 🤣

Notice the scroll indicator insets are not properly managed … because “native”.

Quality experience by bsky engineering.