Question

I am try to automatically assign the attribute value. I need to assign value for class attribute like bellow,

@property (nonatomic,retain)NSString *nid;
....
[self setValue:value forKey:@"nid"];

instead of,

[self setNid:value];

Problem i can’t find method for handle the undefined key in my class. In NSDictionary have method for this,

[[dictionry allKeys]containsObject:@"nid"];

Is there any method similar to this handle my problem.

Answer 1

I am not sure if it what you mean, but the NSKeyValueCoding Protocol Reference knows the function

- (id)valueForUndefinedKey:(NSString *)key

It is called in case of an unknown key in KVC.