Re: Loading saved file into NSArrayController
Re: Loading saved file into NSArrayController
- Subject: Re: Loading saved file into NSArrayController
- From: Mike Abdullah <email@hidden>
- Date: Mon, 18 Feb 2008 10:35:33 +0000
There is nothing technically wrong with doing this, but if you do so
every time the array is modified, your code will get rather messy and
quickly. Instead, just implement the standard array accessor methods
in your model:
-insertObject:in<Key>AtIndex: and -removeObjectFrom<Key>AtIndex:
As a result KVO notifications will be sent automatically, the
notifications will be better tuned to the actual changes, and you'll
end up with less code.
On 18 Feb 2008, at 09:26, Hans van der Meer wrote:
On 17 feb 2008, at 03:25, mmalc crawford wrote:
On Feb 16, 2008, at 9:34 AM, Hans van der Meer wrote:
It might be of use to remember that changes within an
NSMutableArray (addObject, remove...) do not by themselves lead
tot calling the class's observers. I found it useful to bracket
the changes in this manner:
[self willChangeValueForKey:@"theArray"];
// changes to the contents of the array
[self didChangeValueForKey:@"theArray"];
Don't do this.
RTFineM.
Please forgive me my ignorance. But I do not understand why the
change bracketing should not be done. I have struggled a lot with
updating a NSMutableArray bound in IB to an NSArrayController. It
was (at least for me) impossible to get changes like addObject to be
reflected in the coupled tableview UNLESS I bracketed the changes in
the manner indicated above.
I would gladly learn where I am erring. So please could you
elaborate on this statement and indicate how then the coupling array-
IBbinding-tableview can be effected.
Hans van der Meer
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