I have this piece of code in my program:
CGImageSourceRef sourceRef = CGImageSourceCreateWithURL( (CFURLRef) url,
NULL );
if ( sourceRef == NULL )
{
... display error message 1
return;
}
CFDictionaryRef fileProps = CGImageSourceCopyPropertiesAtIndex( sourceRef,
0, NULL );
if ( ! fileProps )
{
... display error message 2
return;
}Now, occasionally, I get "error message 2" but not "error message 1", i.e., CGImageSourceCopyPropertiesAtIndex() apparently fails, while CGImageSourceCreateWithURL() retuned a valid(?) image source ref. I am wondering, how this could happen. Does anyone have a clue? Furthermore, when I run the program a few minutes later, without any changes whatsoever, both function calls work just fine, with the same image files! Puzzled, Gabriel. PS: I never understood what the index in CGImageSourceCopyPropertiesAtIndex() is meant for, and I could not find a clue in the docs, and every example uses just 0 ‒ but probably, this is not related to the problem described above.
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
