Question

I am reading a book on Objective-C, paragraph dedicated to the global variables.

Author uses the following example:

For class Employee

In .h file declare:

extern NSString const *greeting;

In .m file declare

NSString const *greeting = @"Hello";

Author however does not mention the need for

@property (strong, readonly) NSString const *greeting;

and @synthesize greeting;

Am i missing something and there is a way to avoid it, or was that a typo on the author’s part?

Answer 1

@property is for instance variables; global variables are not specific to an instance of a class. Even then, you do not need to use @property, even for instance variables.