We are having same issue, iOS 26.1
final class ShareExtensionVC: UIViewController {
...
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = .clear
self.modalPresentationStyle = .fullScreen
}
Presentation sheet is white. If I use a different color such as self.view.backgroundColor = .red I see a red sheet, but for a clear background I see a white sheet.
In iOS 18.5 (last tested device) the clear background works fine.
Topic:
UI Frameworks
SubTopic:
General
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