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Re: Problem with binding of @count

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Re: Problem with binding of @count

Subject: Re: Problem with binding of @count
From: j o a r <email@hidden>
Date: Fri, 28 Nov 2008 14:59:46 -0800


On Nov 28, 2008, at 11:41 PM, Mikael Wämundson wrote:

But I want the number of objects to be part of a text string ("The number of students is: <the value>"). Thus I put this code into myDocument.m:

-(NSString *) numberOfStudents { return [NSString stringWithFormat:@"The number of students is: %@", [theStudentArrayController valueForKeyPath:@"arrangedObjects.@count"]]; }

No error during compilation or run-time, but value in the text label is not updated when the array is changed.

For a simple thing like this you might also use a "Pattern Binding":

<http://developer.apple.com/documentation/Cocoa/Reference/CocoaBindingsRef/Concepts/BindingTypes.html >

j o a r


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  >Problem with binding of @count (From: Mikael Wämundson <email@hidden>)




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