Starting with iOS 18, there is a change in how the transition from an underlying view to a UIDocumentInteractionController’s preview view is animated. The transition now scales down the size of the content within the controller’s view, using the center point of the root view as the base of the transformation. This results in a smaller, compressed view centered within the root view, revealing the root view’s background, which is typically white. Even if this background color is adjusted to match elements like the navigation bar, the transformed view has non-rounded corners.
I have not tested this behavior when presenting a UIDocumentInteractionController from a SwiftUI view.
My question to the UIKit framework developers: Is this new behavior of UIDocumentInteractionController an intentional feature, a feature with bugs, or just a bug?