Well, I had a doubt about the primitive types of Swift, and some classes like NSString.
var miString : NSString
var miString2 : String
miString = "Hola"
miString2 = "Hola"
miString.length
miString2.characters.count
1. Why and how is it that primitive types have methods?
2. Because and how is it that the NSString object can be equal to a String without using any constructor ... (As it would be
NSString("String o lo que sea") )
You must differentiate between NSString and String . In Swift, an object of type String is a primitive type, but it has extensions with methods to manipulate them.
In the case of NSString is not a primitive type. You just have to look at your initializer to know it's a class like any other that allows you to use chains and do operations with them.
On being able to equal a NSString to a String and the other way around, it is simply an implementation of the frameworks that allow to do those operations.