What happens to SDWebImage Cached Images in my app when the image file on the server changes?

Question

I am using the SDWebImage library to cache web images in my app:

https://github.com/rs/SDWebImage/blob/master/README.md

Current Usage:

Answer 1

Latest Swift 3.0* and SDWebImage

SDWebImageManager.shared().imageCache?.deleteOldFiles(completionBlock: nil)