Re: NSPersistentDocument arrayController Data
Re: NSPersistentDocument arrayController Data
- Subject: Re: NSPersistentDocument arrayController Data
- From: Ian McGregor <email@hidden>
- Date: Fri, 5 Aug 2005 15:05:34 -0700
Hi Harris,
What I am wish to do, is update some of the records in the controlled
array, based on an external file each time the document is opened.
Lets say the array contains a list of products for a store. When the
document is first opened, a field in the products class is checked
against more current values in this external file (say product
quantity). In reality there will be several fields which will be
checked.
At the moment I am having to use a button in the document's window to
activate a function to perform this check, once the document has
loaded. In a previous version of this application (prior to core data
and bindings), this was all done an an ordinary NSMutableArray
instance variable of my document class and a function call in
windowControllerDidLoadNib.
According to the docs , it seems that I should be able to access the
content of the array in windowControllerDidLoad nib, provided I
specified "Automatically Prepare Content" for the array controller.
This seems not to be the case here.
Thanks,
Ian
On 5-Aug-05, at 1:08 PM, Charilaos Skiadas wrote:
On Aug 5, 2005, at 12:50 PM, Ian McGregor wrote:
When an NSPersistentDocument subclass is loaded, and I attempt to
a access the arrangedObjects in a bound NSArrayController, the
array controller does not appear to contain any data yet. I am
attempting access at the windowControllerDidLoadNib stage.
Which method /delegate/stage should I use to be sure the
NSArrayController is ready to give me access to the stored data
(arrangedObjects)? I'd like to perform actions on the array
controller's arrangedObjects each time a document is loaded.
Can you be more specific what actions you want to perform on the
arrangedObjects? Keep in mind that data is loaded only as needed,
so I'm not even sure that arrangedObjects will contain what you
expect it to. In sort, if you explain what you are trying to do,
maybe we can offer another, simpler, way out.
Maybe you can intercept these objects at another stage?
Also, what makes you think that when the window controller has
loaded the nib, the document has already been loaded as well?
Haris
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