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

UI Frameworks UIKit
Bevis Chen 123456 OP
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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!

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Bevis Chen 123456 OP

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.