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

No you can't. But you can do this if you're not using @property:

.h

@interface X : Y {
  struct X_Impl* impl;
}
-(int)getValue;
@end

.m

struct X_Impl {
  int value;
};
...
@implementation X
-(void)getValue {
  return impl->value * impl->value;
}
@end