How should infinite carousel and cell reusability behave during fold transitions?
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Is scroll position preserved during fold?
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If fold occurs during cell reuse, can wrong campaign be displayed?
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Can "load more" pagination trigger twice during fold?
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If swipe gesture is mid-progress during fold, can cell snap to wrong position?
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Can carousel animation glitch during fold?
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Can cell deallocation fail during fold (memory leak)?
Hi @BnsAlm,
Please see our previous response below:
A Summary of the iPhone Duo Group Lab:
https://developer.apple.com/forums/thread/847644
How should apps preserve state — text input, scroll position, video playback, camera sessions — during hinge angle transitions? For example, when a LazyVGrid's column count changes because the device folds, does SwiftUI preserve scroll position automatically, or should you use scrollPosition(id:)?
The system generally preserves text input and scroll position automatically since hinge angle changes are represented as size-class and trait updates, not a scene disconnect or app termination. This applies even to cases like a LazyVGrid column-count change triggered by opening or closing the device — apps typically don't need to manually manage scroll position with scrollPosition(id⚓ ) for this transition. For more info, see Prepare your app for iPhone Duo.
Cheers,
Paris X Pinkney | WWDR | DTS Engineer
