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Can't use @count with bindings

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Can't use @count with bindings

Subject: Can't use @count with bindings
From: Frédéric Testuz <email@hidden>
Date: Sat, 18 Dec 2004 11:00:36 +0100

Hello,

I have some difficulties to use @count on an array. My application is document based. MyDocument object has an ivar NSMutableArray *myArray. I want to show the count of myArray in the window.

I tried to bind a text field to myArray.@count[File's Owner(MyDocument)]. But when I run the application I have this message : [<NSCFArray 0x3025c0> addObserver:forKeyPath:options:context:] is not supported. Key path: @count

Why ? myArray IS an array. If I understand the documentation on KVC, you can use @count keypath on an array.

I have to use a NSArrayController bind to myArray[File's Owner (MyDocument)] to obtain @count. Why the first method don't work ?

--
Frédéric Testuz
<mailto:email@hidden>
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