How do i turn a UIImageVew or the image in it into a CGImage, and then back again?

Question

I just don;t know how to do this. I want more flexibility to edit the image

Answer 1

UIImage instances have CGImage (read-only) property that allow access to CGImageRef image data.
To create new UIImage from CGImageRef you can use convinience contructor:

+ (UIImage *)imageWithCGImage:(CGImageRef)cgImage