Generic-NSCache
A generic NSCache
Usage
create an instance of GenericMemoryCache and save your file
private let imageCache = GenericInMemoryCache<String, UIImage>()
imageCache[identifier] = image // identifier is the url of the image or anything that conforms to hashable
thats it !! your file is saved
now to retrieve it
let cachedImage = imageCache[identifier]
Note:-
This cache takes can store any custom object as its value. Moreover it can also store any key as its value provided it confirms to AnyHashable. I have also implemented NSDiscardableContent so as to prevent its value from being purged on moving to the background.