Exposing/Synthesizing iVar properties in Objective c

Question

I have a class that essentially acts as a light weight wrapper class around another class. It holds that other class as an iVar. I want to be able to expose certain proper

Answer 1

I think you can forward the messages to the ivar:

- (void) forwardInvocation: (NSInvocation*) invocation
{
    [invocation invokeWithTarget:ivar];
}

- (NSMethodSignature*) methodSignatureForSelector: (SEL) selector
{
    NSMethodSignature *our = [super methodSignatureForSelector:selector];
    NSMethodSignature *ivars = [ivar methodSignatureForSelector:selector];
    return our ? our : ivars;
}

Then you have to hide or fake the type of your object, for example by casting to id, otherwise the compiler will complain that your class does not implement those methods. Of course it would be best if you could come up with some better design that would do without such tricks.