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Re: nibs don't know about protocols?
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Re: nibs don't know about protocols?


  • Subject: Re: nibs don't know about protocols?
  • From: Matt Neuburg <email@hidden>
  • Date: Wed, 02 Jun 2010 08:00:43 -0700
  • Thread-topic: nibs don't know about protocols?

On or about 6/1/10 12:01 PM, thus spake "Kyle Sluder"
<email@hidden>:

> On Tue, Jun 1, 2010 at 11:00 AM, Matt Neuburg <email@hidden> wrote:
>> So... Are nibs just ignorant of protocols?
>
> I don't believe the nib loading machinery checks protocol conformance
> when it hooks up outlets. It certainly doesn't check class identity,
> so I wouldn't expect it to check protocol conformance either.

But the nib itself does check class identity; you can't draw an outlet to an
instance of the wrong class. So I'm left wondering, then why are you allowed
to draw an outlet to an instance of a class that doesn't adopt the required
protocol? This feels like a bug to me.

And the fact that you can hook up the UIApplication to a delegate that
doesn't adopt UIApplicationDelegate and run the app and have everything
work, with no complaints at any point, *really* feels like a bug, because in
that case what's the protocol for?

Maybe I should move this over to Xcode-tools list? I started here because
protocols are a Cocoa / language thing, not a tools thing. Wht thnk? m.

--
matt neuburg, phd = email@hidden, http://www.tidbits.com/matt/
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Among the 2007 MacTech Top 25, http://tinyurl.com/2rh4pf
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