Using instance variables with Modern Runtime

Question

I have several years of experience in Obj-c and Cocoa, but am just now getting back into it and the advances of Obj-C 2.0 etc.

I\'m trying to get my head around the

Answer 1

I am running into the same problem. The way I am working around not being able to access the synthesized instance variables is the following:

public header

@interface MyObject:NSObject {
}
@property (retain) id instanceVar;
@property (retain) id customizedVar;
@end

private header / implementation

@interface MyObject()
@property (retain) id storedCustomizedVar;
@end

@implementation MyObject
@synthesize instanceVar, storedCustomizedVar;
@dynamic customizedVar;

- customizedVar {
  if(!self.storedCustomizedVar) {
    id newCustomizedVar;
    //... do something
    self.storedCustomizedVar= newCustomizedVar;
  }
  return self.storedCustomizedVar;
}

- (void) setCustomizedVar:aVar {
  self.storedCustomizedVar=aVar;
}

@end

It's not that elegant, but at least it keeps my public header file clean.

If you use KVO you need to define customizedVar as dependent key of storedCustomizedVar.