Should I use UIImage or CGImage in a Swift iOS App?

Question

All the code I can find revolves around loading images directly into visual controls.

However, I have my own cache system (converting a project from another language

Answer 1

You can load your image easily into an UIImage object...

NSData *data = [NSData dataWith...];
UIImage *image = [UIImage imageWithData:data];

If you then want to show it in a view, you can use an UIImageView:

UIImageView *imageView = [[UIImageView alloc] init]; // or whatever
...
imageView.image = image;

See more in UIImage documentation.