On Aug 5, 2009, at 10:34 PM, Greg Guerin wrote:
Oftenwrong Soong wrote:
I am making a NSDocument based app. In the NIB for the document
window, I need to create a connection to a "global" data object
(think singleton). This "global" data is used when creating the
document, but isn't part of the document.
Normally I'd make a connection by dragging a NSObject into the NIB
but that would instantiate a separate object for each open
document. I want all open document(s) to share the same object.
How can I create such a connection between the NIB and my code?
Create a class, every instance of which refers to the singleton.
These instances all act like funnels leading to the same place. No
matter which instance you refer to in any nib, nor how many
instances are instantiated, it ultimately all goes to the singleton.
-- GG
To follow the Singleton pattern in Cocoa, this documentation is a good
starting point:
http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaFundamentals/CocoaObjects/CocoaObjects.html#/
/apple_ref/doc/uid/TP40002974-CH4-SW32
After you have adapted your class to follow the singleton pattern, you
can instantiate it in your nib.
Aidan
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