Copy of NSDictionary to NSMutableDictionary

Question

I need to know that how can i make a copy of NSDictionary to NSMutableDictionary and change values of there.

Edit

I ned to know how to modify data of a NSDictionary. I got to know that

Copy data of NSDictionary to a NSMutableDictionary. and then modify data in NSMutableDictionary

Answer 1

let f : NSDictionary = NSDictionary() 
var g = f.mutableCopy()