Re: Missing children in NSTreeController/NSOutlineView
Re: Missing children in NSTreeController/NSOutlineView
- Subject: Re: Missing children in NSTreeController/NSOutlineView
- From: Quincey Morris <email@hidden>
- Date: Mon, 14 May 2012 09:02:52 -0700
On May 14, 2012, at 08:40 , Kyle Sluder wrote:
> On May 14, 2012, at 1:06 AM, Quincey Morris <email@hidden> wrote:
>
>> 2. Check the KVO compliance of whichever of these keys you use. For example, a leaf key like this:
>>
>> - (BOOL) isLeaf {
>> return self.properties.count > 0;
>> }
>>
>> *isn't* KVO compliant.
>
> Hmm? As long as you return a set containing "properties" from +keyPathsAffectingIsLeaf, and your class is KVO compliant for "properties", this should also be KVO compliant.
That was my point, the "naked" isLeaf method isn't KVO compliant unless you supplement it with something like keyPathsAffectingIsLeaf.
Note that the set should return "properties.count" (not "properties"), and the class should be KVO compliant for both "properties" AND "count".
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