Re: KVO Response for incomplete paths

FROM : Mike Abdullah
DATE : Wed May 21 21:55:03 2008

On 21 May 2008, at 19:51, Gordon Apple wrote:

>    OK, thanks.  That helps on the KVO responses.  However, I have 
> other
> questions about the entire KVO process.
>
>    Not having access to the innards of KVO, I wonder how dymanic the
> process is.  For example, my inspector bindings are through an object
> controller which binds through MSApp.mainWindow which seems to 
> successfully
> switch its focus to a new main window with no problems.  This, to me,
> indicates that the process operates dynamically according to the path,
> rather than statically binding when it is set up.
>
>    So my new question is whether or not I can successfully observe a
> property that does not exist at registration time, and then have it 
> observe
> properly when the path is created.  E.g., register to observe
> xxx.shadow.angle when shadow does not exist, then add the shadow 
> object and
> have xxx.shadow.angle be observed properly.


As long as xxx returns nil for -valueForKey:@"shadow" initially, and 
then puts out proper KVO notifications when a shadow comes into being, 
this works just fine.

Mike.