Re: compiler warning for not fully implementing protocol
Re: compiler warning for not fully implementing protocol
- Subject: Re: compiler warning for not fully implementing protocol
- From: Bill Bumgarner <email@hidden>
- Date: Thu, 31 Jul 2008 13:13:16 -0700
On Jul 31, 2008, at 11:36 AM, Mark Sanvitale wrote:
I have a formal protocol that declares two methods. I have a class
that adopts this protocol. This class implements one of the
protocol methods. This class inherits from another class. This
super class actually implements a method matching the signature of
the second method declared in the protocol. Everything runs just
fine, however, the compiler insists something is wrong by warning me
"incomplete implementation of class X", "method definition for
'<method-name>' not found", and class 'X' does not fully implement
the 'Y' protocol".
I think the compiler is wrong. Or is this "by design" according to
some strict rule(s) of Objective-C? Am I expected to redefine the
method I inherit from my super class if the method is part of a
protocol I adopt?
The compiler has no way of knowing that the protocol's contract was
fulfilled by the superclass unless you also declare the second method
in the superclass's public interface.
If you don't want to expose the method's declaration, declare it in a
private header.
b.bum
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