Re: nsuserdefaults help please

[Richard Frith-Macdonald]

On 15 Jul 2004, at 03:09, reuss wrote:

> my problem is that I cant edit the values stored in volatiledomain.
> please look at the following:
>
> id masik = [NSUserDefaults standardUserDefaults];
> id dd = [NSMutableDictionary dictionary];
> [dd setObject: @"valami" forKey: @"valami"];
> [masik setVolatileDomain: dd forName: @"Kukucs"];
> [[[masik volatileDomainForName: @"Kukucs"] mutableCopy] setObject: 
> @"semmi" forKey: @"valami"];
> NSLog (@"%@", [masik volatileDomainForName: @"Kukucs"]);
>
> the result following is printed:
> {valami = valami}
> i thougth it should be:
> {valami = semmi}
> am i in mistake?

You are setting 'semmi' into a copy of the domain, not into the actual 
defaults system.
If you want the changed value to be in the defaults, you must use 
setVolatileDomain:forName:
to put the new dictionary into the defaults system again.

Because you are using a volatile domain, any such change, will only 
effect the running process.
For persistent changes effecting all instances of the application, the 
setObject:forKey: method is
used.

To make changes usable by all applications, you use 
setPersistentDomain:forName: with
NSGlobalDomain