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Re: KVC error from bound SortDescriptor
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Re: KVC error from bound SortDescriptor




On Jan 14, 2009, at 11:10 AM, Quincey Morris wrote:

On Jan 14, 2009, at 08:35, Keary Suska wrote:

On Jan 14, 2009, at 4:54 AM, Steven Hamilton wrote:

I have a customer WindowController class and within it I have a method that returns a NSSortDescriptor. Like this;

-(NSArray *)nameSortDescriptors
{
	NSSortDescriptor *sorter;
	sorter = [[[NSSortDescriptor alloc]
			   initWithKey: @"name"
			   ascending: YES] autorelease];
	return ([NSArray arrayWithObject: sorter]);
}

...

Error setting value for key path nameSortDescriptors of object <MLAccountController: 0x58ae390> (from bound object <NSArrayController: 0x589d1a0>[entity: Account, number of selected objects: 1](null)): [<MLAccountController 0x58ae390> setValue:forUndefinedKey:]: this class is not key value coding- compliant for the key nameSortDescriptors.

... 2) make nameSortDescriptors key value coding compliant.

Jumping in with a quibble ...

The OP's window controller class *is* KVC-compliant for the 'nameSortDescriptors' property, but it's an immutable property. The sortable column needs it to be a mutable property. The error message is slightly at fault here.

So the solution is to put the array of sort descriptors in an instance variable and write a setter for the property, which is, I think, what you were implying the OP should do.


I stand corrected. To be more specific, I would say a setter or indexed accessors.

Best,

Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"

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References: 
 >KVC error from bound SortDescriptor (From: Steven Hamilton <email@hidden>)
 >Re: KVC error from bound SortDescriptor (From: Keary Suska <email@hidden>)
 >Re: KVC error from bound SortDescriptor (From: Quincey Morris <email@hidden>)



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