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Re: Understanding the docs. UIApplication for iOS
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Re: Understanding the docs. UIApplication for iOS


  • Subject: Re: Understanding the docs. UIApplication for iOS
  • From: Alex Zavatone <email@hidden>
  • Date: Mon, 03 Jun 2013 20:37:55 -0400

On Jun 3, 2013, at 7:42 PM, gweston wrote:

> Alex Zavatone wrote:
>
>> > I think you might have some confusion about what a protocol is in Obj-C, which might be making it hard to frame your question in terms that make sense to the rest of us.
>>
>> It's not what a protocol is that's confusing (a neatly packaged set of methods geared for a specific purpose), ...
>
> And yet, that's really not a good definition of what a protocol is. That's closer to a category.

OK, how about what I said + "for the purpose of establishing a formal mechanism for classes to talk to each other"?

> Really the best description of a protocol is the definition of the word protocol itself. It's a sort of contract that defines the way one object can assume it's able to interact with another. It's not a set of methods but of messages. So back to your first post:
>
> "It's not listed that the UIApplication class conforms to the UIApplicationDelegate, ..."
>
> Right. Because UIApplication *does not* conform to UIApplicationDelegate. It's a client of that protocol.
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