Accessing extern NSString from Objective-C in Swift

Question

I have an extern as NSString in Objective-c and wanted to see if it can be accessed from Swift? And if so how would it get accessed.

Let's say the extern is as following:

extern NSString *_Nonnull const test;

Answer 1

You can easily test this thing

Like you have a file const.h where you have placed that extern Now import const.h in bridging header, if that extern is just a string or number or int or something like that it will easily be accessible

Like

Const.h

extern NSString * const test = “testing”;

Bridging_header.h

#import “const.h” 

SwiftTest.swift ....

Print(test)

Answer 2

您可以在Swift中将其用作全局常量test ，类似于在类/结构范围之外let test = "message"