UISplitViewController primary column differences in 27 vs 26

UI Frameworks UIKit
hackyplace OP
Created 13h
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This post is from the WWDC26 UIKit Q&A.

The primary column sidebar in iPadOS 26 has a 10pt padding (not sure if we can access this value programmatically) which we hard-coded for edge inset calculations of the secondary view. It appears this padding is still present with the new design. Can we derive this property reliably somehow?

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Frameworks Engineer OP
Apple
13h

In iPadOS 27, sidebars are edge-to-edge. The sidebar adds a safe area inset to the adjacent column in the split view controller.

To prevent content from being occluded by a sidebar, ensure that it is positioned within the safe area.

For more information, check out Make your UIKit app more flexible from WWDC25.

UISplitViewController primary column differences in 27 vs 26
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