Re: newbie NSMutable dictionary subclass question
Re: newbie NSMutable dictionary subclass question
- Subject: Re: newbie NSMutable dictionary subclass question
- From: Mike Abdullah <email@hidden>
- Date: Mon, 17 Nov 2008 10:16:29 +0000
As a self-professed newbie, you almost certainly shouldn't be
subclassing NSMutableDictionary. Can I ask your reasons for doing so?
On 17 Nov 2008, at 00:25, Bob Sabiston wrote:
Can the value part of a key-value pair in an NSMutableDictionary be
a literal NSString, like @"name"?
It would seem so, because this works or at least doesn't crash:
NSMutableDictionary *bobo;
bobo = [[NSMutableDictionary alloc] init];
[bobo setValue:@"root" forKey:@"name"];
However, I have a class derived from NSMutableDictionary, and it is
crashing when I try to do the same thing:
@interface myClass : NSMutableDictionary {
}
@end
myClass *tree;
tree = [[myClass alloc] init];
[tree setValue:@"root" forKey:@"name"];
Why does that crash when the first does not? Are subclasses
required to have member variables, or can they just have new
functions? Mine don't have any variables, maybe that is the problem?
Thanks for any replies!
Bob
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