On Sat, Jul 25, 2009 at 10:21 PM, Kyle Sluder<kyle.slu...@gmail.com> wrote:
> Also not a safe option; other Apple apps can access the XML file, includeing
> CoreServices (for the media picker in the Open panel). Unfortunately we
> don't know how they do it and therefore can't be guaranteed that they won't
> also break if you have a lock on the database file.
Thanks for the heads up. I'm afraid the end users would be upset if
the app required iTunes to be running all of a sudden, though. So I'll
try with the Core Foundation methods for now (without locking the
file). Hopefully it won't result in a crash if the file is modified
while read, just a NULL pointer or invalid data (which is fine
considering how often the data is read, I'll just rely on the last
valid object).
CFPropertyListRef CreateMyPropertyListFromFile( CFURLRef fileURL ) {
CFPropertyListRef propertyList;
CFStringRef errorString;
CFDataRef resourceData;
Boolean status;
SInt32 errorCode;
// Read the XML file.
status = CFURLCreateDataAndPropertiesFromResource(
kCFAllocatorDefault,
fileURL,
&resourceData, // place to put file data
NULL,
NULL,
&errorCode);
// Reconstitute the dictionary using the XML data.
propertyList = CFPropertyListCreateFromXMLData( kCFAllocatorDefault,
resourceData,
kCFPropertyListImmutable,
&errorString);
if (resourceData) {
CFRelease( resourceData );
} else {
CFRelease( errorString );
}
return propertyList;
}
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