Quincey Morris wrote:
On Jun 29, 2009, at 15:23, Michael de Haan wrote:
Given this simple app....which keeps a slider and textField's value
synchronized.
1) View consisting of a slider and a textField
2) Model (Foo) with a single property "number"
3) NSObjectController
I am able to use 2 configurations to get the app to work.
Config (1).
In IB, Bind the textField's and Slider's values to the model Key
Path "selection.number".
Connect the NSOjectController's outlet ( cntrl-drag to foo).
Config (2)
As config (1) ...first line only.... now Bind NSObjectController
to Foo, with the model Key Path = self.
Could someone please explain why both work, and any reason for
choosing one over the other.
Is File's Owner of class Foo?
No...it's of class NSApplication.
(I'm not sure how you'd bind to Foo otherwise.)
NSObjectController bindings offer both File's Owner and Foo , (amongst
others) as an option for binding.
If so, the two methods are exactly identical.
Method (1) is what you'd normally use for objects inside the NIB
file. Method (2) is what you'd normally use for objects not in the
NIB file. File's Owner is not actually in the NIB file, but it
pretends to be, so you have a choice.
Thanks for your insight.
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