Sadly this is exactly the routine I need for the work I'm doing. I guess I'm too small of a market for Apple to support me =P.
getResourceValue:forKey:error:
Returns the resource value for the property identified by a given key.
- (BOOL)getResourceValue:(id *)value forKey:(NSString *)key error:(NSError **)error
Parameters
value
The value for the property identified by key.
key
The name of one of the URL’s resource properties.
error
The error that occurred in the case that the resource value cannot be retrieved.
Return Value
YES if value is successfully populated; otherwise, NO.
Discussion
value is set to nil if the requested resource value is not defined for the URL. In this case, the method still returns YES.
This method is unimplemented in iOS, so it performs no operation.
Availability
- Available in iOS 4.0 and later.


