Is the checkerboard background as seen in UIDocumentInteractioController predefined in iOS?

I have implemented a scrollview which uses a CATiledLayer. In UIDocumentInteractionController the view shows some kind of checkerboard background while loading its contents. I wonder if there is something similar to UIColor.ScrollViewTextured开发者_如何学PythonBackgroundColor to get this checkerboard? Or do I have to use my own image?

No, there's none in the IOS documentation, unfortunately. Apple uses their custom backgrounds on a lot of apps, and in general you just need to create it and load it with the UIColor.FromPatternImage(UIImage.FromBundle("image")) command.