Is there any difference between interface var and implementaion var in .m

Question

/* Variable declared in @interface of .m file */

@interface ClassA () {
    NSMutableArray *mDocuments;
}

/* Variable declared in @implementation of .m file */

@implementation ClassA () {
    NSMutableArray *mDocuments;
}

_Thanks_ for the help. – Thangaraj Ramasamy Feb 16 '14 at 04:12 — Thangaraj Ramasamy, Feb 16 '14 at 04:12

score 2 · Answer 1 · edited May 23 '17 at 12:10

2

Declaring a variable in @interface is so it can be seen by other files, so a public declaration.

Declaring a variable in @implementation is private to the file.

edited May 23 '17 at 12:10

Community

answered Feb 16 '14 at 03:51

David P

Is this visible, even if I declare in `@interface` of **.m** file? – Thangaraj Ramasamy Feb 16 '14 at 04:03
It will be visible in ClassA in either location. You should put it in `@implementation` unless you have a reason for it to be public. (In my experience, I've never declared in @interface, only in the .h file). – David P Feb 16 '14 at 04:06
_Thanks_ for the help. – Thangaraj Ramasamy Feb 16 '14 at 04:12

1 Answers1