Re: Triggering a Method when a Core Data Property is Altered.
Re: Triggering a Method when a Core Data Property is Altered.
- Subject: Re: Triggering a Method when a Core Data Property is Altered.
- From: Volker in Lists <email@hidden>
- Date: Tue, 6 Oct 2009 19:57:59 +0200
Josh,
depending on where you need to get a notification:
a) within the same NSManagedObject or a relationship: http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Protocols/NSKeyValueObserving_Protocol/Reference/Reference.html#//apple_ref/occ/clm/NSObject/keyPathsForValuesAffectingValueForKey:
b) in any other object: just register as observer as described in KVO
basics: http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/KeyValueObserving/Concepts/KVOBasics.html
Take note: The triggering happens not on the change of the
TextFieldCell in a table, but due to a property changing.
When you have looked into KVO - what have you tried already?
Cheers,
Volker
Am 06.10.2009 um 18:45 schrieb Joshua Garnham:
Hi.
I am trying to trigger a method when A Core Data property is
changed, e.g A Text Fields Text in a Table (connected to Core Data)
is changed. I have looked into Key Value Observing but haven't had
much luck.
Cheers.
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