When I compiled the latest SVGKit library , I noticed new functions, which allow to show SVG using Url. But I did not wrap them, because I do not see meaning.
Guess, Erel's advice is a good solution. I don't see reasons, why not to save files to device. Security ? No (Internet). No place on device ? Also, no, because SVG files are very small and you can show a image and then to delete.