Re: Where are the target and action variables?
Re: Where are the target and action variables?
- Subject: Re: Where are the target and action variables?
- From: "Shawn Erickson" <email@hidden>
- Date: Thu, 30 Aug 2007 11:55:42 -0700
On 8/30/07, Frank Bettger <email@hidden> wrote:
> A newbie question. Suppose I have an AppController object with a method
> called seed:. Suppose I have a NSButton object with the target outlet that
> points at AppController object and and action that triggers AppControllers
> seed: method.
> My question is what happens when I Control-drag in the IB from the button to
> my instance of AppController and then choose Target/Action tab in the
> inspector and select seed: and then click on the Connect button.
>
> As I understand it NSButton has two instance variables called target and
> action. As soon as I perform the actions in IB, descrined above the
> following happens:
> 1. The address of the AppController object is stored in the target instance
> variable.
> 2. The selector of the AppController's seed: method is stored in the action
> instance variable.
> Is this correct or wrong?.
Essentially yes, however you shouldn't really worry about how this
information is stored, etc. since it is an implementation detail.
> One more question: Looking at the interface of NSButton and it's
> superclasses NSControl, NSView, NSResponder, NSObject. I did not find any
> instance variables called target and action.
Again it is an implementation detail... don't worry about. :)
(hint: it is stored by the controls cell)
-Shawn
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