Re: Making my transition to bindings, how do I initilize my values & notifications?
Re: Making my transition to bindings, how do I initilize my values & notifications?
- Subject: Re: Making my transition to bindings, how do I initilize my values & notifications?
- From: George Lawrence Storm <email@hidden>
- Date: Mon, 18 Oct 2004 14:01:47 -0700
Opps, correction, I do have the ability to use -awakeFromNib: (I forgot
it was an informal protocall) and have initilized my variables
accordingly, however I still do not know how to tell the views to use
their values.
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George Lawrence Storm
Macintosh Applications Development
Snohomish (Seattle), Washington
E-mail: <email@hidden>
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On Oct 18, 2004, at 1:48 PM, George Lawrence Storm wrote:
I have run through several tutorials and have read the documentation
and I am now attempting to make my transition to the use of bindings.
I have run into my first road block:
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How do I set the initial values for my views to display? In the case
of views using NSArrayControllers they seem to know what to do,
however I am using a NSObjectController.
I am basing my controller on the "Currency Converter" example, in that
example I see no place for my instance to receive a message that it is
being instantiated and I do not see how to notify the views that they
need to call the controller accessor(s) to lookup their value(s).
I have placed an -init in my class, however it is not being called, as
I am attempting to follow "Currency Converter" which creates my object
from its nib file and that my object is a NSObject and has no
-awakeFromNib: is there any other place I can hook into to see when I
am being instantiated?
As part of my testing I placed breakpoints in several of my accessors
and they are not being called when the view(s) are created, so it
appears that there is no automatic initialization.
All the examples I have found which initialize the views from stored
data are based on NSArrayController, is there an example using
NSObjectController?
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My next question concerns why "Currency Converter" calls
+setKeys:triggerChangeNotificationsForDependentKey: from its class
+initialization. I will be creation, destroying and will have multiple
instances of the object which holds the data and its accessors, should
I not be adding these notifications during the instantiation of my
object and releasing them during their destruction?
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