https://fatfatson.github.io/2020/02/21/SkiaImageSource%E5%9C%A8%E5%9B%BE%E7%89%87%E5%B0%BA%E5%AF%B8%E4%B8%8A%E4%B9%9F%E7%8A%AF%E4%BA%86%E5%92%8CXamarin-iOS%E4%B8%80%E6%A0%B7%E7%9A%84%E9%97%AE%E9%A2%98/
