[iOS] Using Compose inside a ShareExtensionViewController renders it black about compose-multiplatform HOT 7 OPEN

Thanks, I'll have a look

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@alexstyl
Yes, I reproduced it. Investigating.

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UIApplication.shared is illegal to access in App Extensions and we still wrongfully do it in order to ensure, that no drawing happens when app is in background (which it says it is, it's UB most likely anyway). Working around it will also require us to update Skia. The version we use still performs MtlIsAppInBackground check (which does the same thing) and wrongfully exits not even trying to perform the draw logic.

This is possible to fix, but a bit later. We didn't plan supporting such a feature and didn't do any sort of investigations, so there are some implications in existing code (regarding lifecycle, etc).

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Can you try to rewrite this code using the anchor constraints instead of autoresize mask? It seems to me that the size could be calculated incorrectly in this code.

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I tried this code and the result is the same:

let rootView = ComposeView()
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .background(Color.white)
        let controller = UIHostingController(rootView: rootView)
               
        self.addChild(controller)

        controller.view.translatesAutoresizingMaskIntoConstraints = false
        self.view.addSubview(controller.view)
        
        controller.view.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
        controller.view.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
        controller.view.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
        controller.view.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
        
        controller.didMove(toParent: self)

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Keep in mind that I tried the same code to render a Swift View and the contents of the Swift View were displayed correctly.

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@elijah-semyonov did u have a look? could you kindly confirm that is indeed a bug in compose?

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