Ha - that did it!
As expected, you are a rock star, Graham.
(and no, the following methods don't muck with the dictionary - it's obviously
some "subtlety" in KVC... There is an underscore in the key string, so that
probably borked it.)
cheers,
J.
On 2010-02-15, at 2:09 PM, Graham Cox wrote:
>
> On 16/02/2010, at 8:56 AM, James Maxwell wrote:
>
>> I have an NSMutableDictionary I'm trying to read from, but it's giving me
>> valueForUndefinedKey errors. I can NSLog the key successfully, so I'm very
>> confused as to what's going on.
>>
>> NSLog(@"Total number of components in work: %i", [AllComponents count]);
>> for(NSString* cKey in AllComponents)
>> {
>> NSLog(@"key? %@", cKey);
>> MnSComponent *comp = (MnSComponent*)[AllComponents valueForKey:cKey];
>> [comp buildPitchMatrix];
>> [comp calculateTension];
>> }
>>
>> The NSLog prints the expected key, then the code gags on the next line. ???
>
> Try -objectForKey: instead of -valueForKey: there might be some subtlety of
> use KVC versus direct access that's screwing things up here. The key might
> contain characters that can be misinterpreted by KVC - containing '@' or '.'
> characters for example.
>
> Also, are you certain that buildPitchMatrix and calculateTension are not
> mutating the dictionary? If they do the iteration will fail.
>
> --Graham
>
>
James B Maxwell
Composer/Doctoral Student
School for the Contemporary Arts (SCA)
School for Interactive Arts + Technology (SIAT)
Simon Fraser University
jbmaxw...@rubato-music.com
jbmax...@sfu.ca
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