Hide instance variable from header file in Objective C

Question

I came across a library written in Objective C (I only have the header file and the .a binary). In the header file, it is like this:

@interface MyClass : MyS         


        

Answer 1

I was able to do the following in my library:

myLib.h:

@interface MyClass : SomeSuperClass  {
  // Nothing in here
}

- (void)someMethods;
@end

myLib.m

@interface MyClass () 
    SomeClass *someVars;

    @property (nonatomic, retain) SomeClass *someVars;
@end


@implementation MyClass

@synthesize someVar;

- (void)someMethods {
}
@end

The protocol is optional of course. I believe this also makes all your instance variables private though I'm not 100% certain. For me it's just an interface to my static library so it doesn't really matter.

Anyway, I hope this helps you out. To anyone else reading this, do let me know if this is bad in general or has any unforeseen consequences. I'm pretty new to Obj-C myself so I could always use the advice of the experienced.