Swift 3: Date vs NSDate?

Question

What is the difference between the NS and non NS classes? Particularly NSDate vs Date? Does NS represent some type of wrapper around

Answer 1

NS classes are Objective-C classes. As Objective-C is the older programming language for iOS or MacOS applications, Swift allows you to use those classes structs in your code. So you can migrate applications from Objective-C to Swift if you want to.

The non-NS classes or structs are the Swift equivalents of the the NS classes or structs. You can read more about this issue here or here.

But be aware: As Objective-C and Swift do are different programming languages, it can happen that NS and non-NS classes are not completely working the same way.