Re: Cocoa-dev Digest, Vol 5, Issue 432
Re: Cocoa-dev Digest, Vol 5, Issue 432
- Subject: Re: Cocoa-dev Digest, Vol 5, Issue 432
- From: Jay Martin <email@hidden>
- Date: Tue, 18 Mar 2008 18:41:56 -0500
I have an NSTableView, bound to an NSArrayController, which is bound
to my custom object. So far so good. I can change attributes, add,
remove, all that good stuff. Now, my custom object can have one
property changed programmatically by an NSTimer. Of course, when the
change happens, the object is updated but not the NSTableView.
Chances are, you are not updating the property in a KVO-compliant way.
First, make sure you are doing things correctly, before kludging a
workaround.
See:
http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaBindings/Conc
epts/Troubleshooting.html#//apple_ref/doc/uid/TP40002148-
DontLinkElementID_6
And if you haven't read that whole document, you really really need
to.
That was it - there were two places in my object where I was updating
the property directly rather than calling the accessor. Sigh. I have
read the bindings docs, but skipped the troubleshooting section (in
fact, forgot it was there). A couple of people pointed this out. Mea
culpa.
My second question is more general. I've basically just completed the
Cocoa Programming book by Hillegass. Is there a "next" logical book/
document to read, or is it just time to write lots of experimental
code and ask questions?
Write lots of experimental code, but read relevant docs *before* you
ask
questions. Get AppKiDo <http://homepage.mac.com/aglee/downloads>.
Not only
does it greatly simplify browsing the API, it also makes it easy to
find
conceptual documentation.
Unfortunately, just about every Cocoa book on the market is sorely
out of
date. Kochan's Objectice-C book, however, is a must-have must-read.
I have Kochan's book. Haven't read through the whole thing, just been
using it as a reference. I'll go back through it. With a large
collection of frameworks like Cocoa it's sometimes hard to know when
to keep digging and when to ask, but after spinning on this for a
couple of days I decided I should ask.
Just downloaded AppKiDo - looks nice.
Thanks,
jay
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