On May 11, 2010, at 12:44 PM, Joanna Carter wrote:
>> Will that still trigger the normal binding behavior?
>
> Only if you implement the KVO pattern in the setters:
>
> - (void) setCornerSize:(NSSize) _size
> {
> [self willChangeValueForKey:@"CornerSize"];
> [[self cell] setCornerSize:_size];
> [self didChangeValueForKey:@"CornerSize"];
> }
This is not true. -setCornerSize: -cornerSize are KVO/C compliant method names
and require no manual triggering of will/didChangeValueForKey:.
To quote the documentation:
"... it is not necessary to bracket changes to a property with invocations of
willChangeValueForKey: and didChangeValueForKey: when mutating properties via
key-value coding and key-value coding compliant methods."
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/KeyValueObserving/Concepts/AutoVsManual.html#//apple_ref/doc/uid/20001844-BAJEAIEE
--
Seth Willits
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