Re: NSObject copy explanation
Re: NSObject copy explanation
- Subject: Re: NSObject copy explanation
- From: p3consulting <email@hidden>
- Date: Fri, 12 Dec 2003 17:44:42 +0100
On 12 dic. 2003, at 15:47, Thierry Bucco wrote:
Hi,
I am 'playing' with ClockControl source code providing by Apple, in
order to insert my custom control in a NSTableView.
I did a modification on the class, since I want to pass a NSDictionary
to the control. All works like a charm, but in the setObjectValue
function (- (void)setObjectValue:(NSObject *)object) I need to copy the
dictionary sent by the NSTableView to my control.
My problem is when I use : newDictionary = [NSDictionary
dictionaryWithDictionary:(NSDictionary *)object];
if objet is not a NSDictionary this will return nil
casting by (NSDictionary *) just makes the compiler warning goes away
but didn't solve the runtime problem if ([object
isKindOfClass:[NSDictionary class]]) returns NO.
I get a NULL object, but If I call : newDictionary = [(NSDictionary
*)object copy];
if object is a valid NSObject subclass (any kind supporting the NSCopy
protocol) then you assign to the variable newDictionary a copy of it
but that doesn't make a "real" NSDictionary of it ...
Apparently your problem is that the variable"object" doesn't contain a
NSDictionary...
check from where it comes from... (the assumption "dictionary sent by
the NSTableView to my control" is probably wrong)
Pascal Pochet
P3 Consulting
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