Constants in Objective-C

Question

I\'m developing a Cocoa application, and I\'m using constant NSStrings as ways to store key names for my preferences.

I understand this is a good idea b

Answer 1

If you want to call something like this NSString.newLine; from objective c, and you want it to be static constant, you can create something like this in swift:

public extension NSString {
    @objc public static let newLine = "\n"
}

And you have nice readable constant definition, and available from within a type of your choice while stile bounded to context of type.

Answer 2

// Prefs.h
extern NSString * const RAHUL;

// Prefs.m
NSString * const RAHUL = @"rahul";