Re: Using NSArrayController programmatically in library class
Re: Using NSArrayController programmatically in library class
- Subject: Re: Using NSArrayController programmatically in library class
- From: dreamcat7 <email@hidden>
- Date: Sat, 6 Sep 2008 15:47:43 +0100
Can i bind arrayController.contentArray to employees.name ?
or bind arrayController.contentArray to employees and then bind an
NSMutableArray to arrayController.arrangedObjects.name ?
On 6 Sep 2008, at 14:03, dreamcat7 wrote:
Hi
I am extending a library class which is also one of my application's
model objects. The Library class contains an NSMutableArray of
NSData which it absolutely needs to perform its tasks. To extend the
class i must now also hold metadata about each NSData object in the
array (i.e. the <item> elements in the array now becomes a pair or
triple).
Conveniently the Hillegass example is similar. In RaisMan the person
data is displayed in columns of TableView. (and i would like to have
a tableview maybe also but thats not the point). I should create a
new object called person.h that defines each element in the array
and provides the accessor methods for binding to
person.expectedRaise and person.Name. Then an NSArrayController can
give an array for each column of the data. Another common method is
to make an NSMutableArray of NSMutableDictionaries and then binding
the dictionary @"key" to the arrayController. Either way achieves
such a goal.
But here is the crux of my problem:
The library object (which encloses these array) must keep its
interface which is a flat array of NSData (and as originally) is
used on the api side.
Can i store internally the complicated array including the metadata
and use an NSArrayController to expose only the original NSData part
of each item?
In other words;
This would be equivalent to saying that person.Name ==
persons.person and person.expectedRaise is a calculated metadata
about the person. If i wanted to use an array of persons in a
payroll department object then i would initialise the department
with an array of person names, and the payroll department would take
care of figuring out what the expectedRaise should be for each
person. Then the payroll department would need to have itself an
NSArrayController to map an array of string objects taken by the
initializer to the internal array of person objects.
Is anything special required to use the NSArrayController
programmatically as i shall not be using Interface Builder?
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