Am 12.03.2010 um 21:06 schrieb Eli Bach:
> On Mar 12, 2010, at 12:19 PM, Eli Bach wrote:
>
>> And I did just try it, and got a binding error:
>>
>> Cocoa Bindings: Error setting value for bound property instanceOfA of object
>> <controllerclass: 0x100675780>: [<_NSFaultingMutableSet 0x1006eab90>
>> addObserver:forKeyPath:options:context:] is not supported. Key path:
>> relationC
This sounds like someone tries to SET the value. Not just to read it.
That might break.
>> I figured it would be something like this, which is why I was looking at the
>> @unionOfSets operator in particular (as that's exactly what this is, a union
>> of all sets of relationC objects from a set of relationB objects.
>
> And to follow up, I tried both
>
> instanceo...@unionofsets.relationb.relationc
>
> and
>
> instanceofa.relatio...@unionofsets.relationc
>
> and as an NSArrayControllers array binding [as the documentation says that
> @unionOfSets returns an array], and both resulted in a binding error at
> runtime.
Maybe you can not bind that way. I have more experience using KVC than KVO. KVC
should work that way.
Sorry to have bothered you,
atze
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