Re: NSTextField value binding (feeling like a newbie)
Re: NSTextField value binding (feeling like a newbie)
- Subject: Re: NSTextField value binding (feeling like a newbie)
- From: Jeff LaMarche <email@hidden>
- Date: Tue, 18 Mar 2008 18:17:49 -0400
Quincey -
Thanks much. You pointed me in the right direction - I was doing this:
[self.feedback appendString:string];
Thanks much for the help!
On Mar 18, 2008, at 6:10 PM, Quincey Morris wrote:
On Mar 18, 2008, at 14:33, Jeff LaMarche wrote:
I have bound the value binding of the NSTextField to an NSString
called feedback,
Actually, you bind the text field to the property "feedback" of some
object (File's Owner?). When you start using array properties,
getting this terminology right will help you avoid a *lot* of grief.
(Sometimes a property of an object is really an object, sometimes
it's not.)
exposed as an Objective-C 2.0 property,declared like this:
@property (retain, nonatomic) NSMutableString *feedback;
In my implementation, use @synthesize to have it build the
accessors and mutators. The binding is set to Continuously Updates
Values, and is not editable, and has rich text turned off. If I run
my program, and make changes to the string (feedback), those are
not reflected in the text field even though I can tell through the
debugger that the string is changing.
Make changes how? If you're doing 'someObject.feedback = newString',
the text field should update. If you're doing (in a someObject
method) 'feedback = newString', the text field won't update unless
you enclose it in willChangeValueForKey/didChangeValueForKey.
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