I do this quite a bit in my code. However, I have experienced one
issue.
I attempted to create a initWithDescriptor: method for NSArray (at
least I think it was NSArray). The idea being that I could create
an array from an NSAppleEventDescriptor. However, when you send
the initWithDescriptor: message, NSArray complains bitterly and
effectively crashes the app. It seems you cannot send any messages
to an NSArray until you have used one of its init method.
You do need to be careful when writing these. One way to do it is
@implementation NSArray (Descriptor)
- (id)initWithDescriptor:(id)descriptor;
{
// get rid of the object from +alloc to avoid leaking it
[[self init] release];
return [[NSArray alloc] initWithObjects:descriptor, nil];
}
@end
In the end to solve this I just made a +arrayWithDescriptor method
instead.
That works too, but I've found occasions where a non-autoreleased
variant was required.
-- Adam
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