Issue with UIKit windows on Xcode 11 and iOS 13 beta 2

Question

When presenting content on a new window, it automatically dismisses itself.

I'm presenting a ViewController in a new window with something like the following extension:

extension UIViewController {

     func present() {
          let window = UIWindow(frame: UIScreen,main.bounds)
          let viewController = UIViewController()
          viewController.view.background = .clear
          window.rootViewController = viewController
          window.windowLevel = UIWindow.level.alert + 1
          window.makeKeyAndVisible()
          viewController.present(self, animated: true, completion: nil)
     }
}

I can see the following coming up in the debugger.

0000-00-00 00:00:00.000000+0000 App[0000] [TraitCollection] Class _UIFormSheetPresentationController overrides the -traitCollection getter, which is not supported. If you're trying to override traits, you must use the appropriate API.
0000-00-00 00:00:00.000000+0000 App[0000] [TraitCollection] Class _UIPageSheetPresentationController overrides the -traitCollection getter, which is not supported. If you're trying to override traits, you must use the appropriate API.

Anyone seen anything similar? Are the new scenes acting up here? I'm quite certain this behaviour did not occur on iOS 13 beta 1

iOS

4.1k

Posted by

carrharr

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Answer 1

I have the same issue, it's crashing the app , looking for a solution...

Posted by

domdom78

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Answer 2

You might be able to get around this by setting `self.modalPresentationStyle = .fullscreen`, which won't use the new modal presentation style, but will also not use the `_UIPageSheetPresentationController` class, which seems to be causing the issue.

Posted by

kylebshr

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Answer 3

I've tried setting the `self.modalPresentationStyle = .fullscreen` before, but the issue comes when trying to use a new window which is the objective here. Still an issue on iOS 13 Beta 3.

Posted by

carrharr

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Answer 4

Facing the exact same issue. @carrharr Did you have any luck getting this resolved?

Posted by

uchiha-madara

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Answer 5

It works if you hold a reference to the UIWindow e.g.

var window: UIWindow?

extension UIViewController {
    func present() {  
        window = UIWindow(frame: UIScreen,main.bounds)
    }
}

I don't know why this is needed...

Posted by

jsslai

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Answer 6

I had the same issue when working with a framework .

my solution was to wrap my view controller in a navigation controller and instead present that navigation controller modally you can hide the navigation bar if needed

like this

func present() {

let viewController = UIViewController()

let navigationController = UINavigationController(rootViewController: viewController)
navigationController.navigationBar.barStyle = .blackTranslucent

// Present it modally from the current controller

present(navigationController, animated: true, completion: nil)

}

Posted by

kddior

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Issue with UIKit windows on Xcode 11 and iOS 13 beta 2

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