Question

I found few codes like this

#SOMECLASS.h
@interface SOMECLASS : SOMESUPERCLASS

@end

#SOMECLASS.m
    @implementation SOMECLASS {
        NSMutableArray *a;
        NSMutableArray *b;
        NSMutableArray *c;

        BOOL d;
    }

    @synthesize something;

    - (id)init
    {
        self = [super init];
        if (self) {
           //something
        }
        return self;
    }

can someone explain me what this actually means ? the @implementation and then ‘{‘ some variable declarations here ‘}’ what does this mean ? what are the scopes of the variables declared in here ?

Answer 1

Those are instance variables declared in the class implementation. See The Objective-C Programming Language for the official documentation.