Re: Handling bindings of an NSControl which forward everything to an NSCell?
Re: Handling bindings of an NSControl which forward everything to an NSCell?
- Subject: Re: Handling bindings of an NSControl which forward everything to an NSCell?
- From: aaron smith <email@hidden>
- Date: Tue, 11 May 2010 15:49:48 -0700
"I would be surprised since it is developer-fault anyway"
developers don't make mistakes. machines do!. hahah. j/k.
Thanks for the tips and links everyone.
On Tue, May 11, 2010 at 3:26 PM, Keary Suska <email@hidden> wrote:
> On May 11, 2010, at 2:42 PM, Quincey Morris wrote:
>
>> On May 11, 2010, at 12:45, Joanna Carter wrote:
>>
>>> Only if you implement the KVO pattern in the setters:
>>>
>>> - (void) setCornerSize:(NSSize) _size
>>> {
>>> [self willChangeValueForKey:@"CornerSize"];
>>> [[self cell] setCornerSize:_size];
>>> [self didChangeValueForKey:@"CornerSize"];
>>> }
>>
>> Um, not so much. :)
>>
>> In the normal case, setters *should not* call will/didChangeValueForKey, since the entire setter is (invisibly) enclosed in a pair of such calls. It's harmless (AFAIK), because KVO explicitly suppresses the recursion implied by calling them within the setter, but it's absolutely unnecessary. Unless ...
>
> In my experience, doing this will actually raise application-breaking exceptions in many cases, unless this has been solved by a recent OS release. I suspect that the API does *not* do any checking, or doesn't check in every case. Unless, of course, this has been "fixed" since I came across it last, which is possible but I would be surprised since it is developer-fault anyway.
>
> Keary Suska
> Esoteritech, Inc.
> "Demystifying technology for your home or business"
>
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
>
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden