iOS 26 UINavigationController adds corner radius on transition – how to disable?

Hi, In iOS 26, pushing or popping a view controller via UINavigationController shows a rounded corner effect during transition. This seems to be a new system feature.

Is there a way to disable this and restore the previous full-rectangle style, as seen in earlier iOS versions (e.g. iOS 18)? Any official API or recommended approach?

Thanks!

The reason I'm asking:

During the transition, the rounded corner disappears at the final moment, creating a visible delay, which feels odd.

In particular, some UI elements are clipped by the rounded corners, making the animation feel visually inconsistent or even awkward.

iOS 26 UINavigationController adds corner radius on transition – how to disable?
 
 
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