uncaught exception with dictionnary and label.text - iphone

Question

I try to search in the dictionnary (passed trough an observer):
NSDictionary *myDictionnary = [NSDictionary dictionaryWithObjectsAndKeys:#"details",#"details de l'installation",#"recapitulatif",#"recapitulatif de l'installe",nil];
... to set the text in a label :
NSLog(#"key: %#, value: %#", recapitulatif, [dictionnary objectForKey:#"recapitulatif"]);
details.text = [dictionnary objectForKey:#"recapitulatif"];
But it make me an uncaught exception :
-[ThirdViewController objectForKey:]: unrecognized selector sent to instance 0x4b59c30
2012-01-09 15:07:13.179 emars[8185:b303] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ThirdViewController objectForKey:]: unrecognized selector sent to instance 0x4b59c30'
*** Call stack at first throw:
(
0 CoreFoundation 0x00fb45a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x01108313 objc_exception_throw + 44
2 CoreFoundation 0x00fb60bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00f25966 ___forwarding___ + 966
4 CoreFoundation 0x00f25522 _CF_forwarding_prep_0 + 50
5 emars 0x0000439d -[FirstViewController updateLabel:] + 134
6 Foundation 0x0002f669 _nsnote_callback + 145
7 CoreFoundation 0x00f8c9f9 __CFXNotificationPost_old + 745
8 CoreFoundation 0x00f0b93a _CFXNotificationPostNotification + 186
9 Foundation 0x0002520e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134
10 emars 0x0000880b -[ThirdViewController connectionDidFinishLoading:] + 541
Thanks to help me, I don't understand my mistake
EDIT:
Here is the whole method :
- (void)updateLabel:(NSNotification*)notification
{
NSDictionary *dictionnary = (NSDictionary*)[notification object];
NSLog(#"key: %#, value: %#", recapitulatif, [dictionnary objectForKey:#"recapitulatif"]);
}
And the Observer is send from "ThirdViewController" class :
NSDictionary *myDictionnary = [NSDictionary dictionaryWithObjectsAndKeys:#"details",#"details de l'installation",#"recapitulatif",#"recapitulatif de l'installe",nil];
[[NSNotificationCenter defaultCenter] postNotificationName:#"LABELUPDATENOTIFICATION" object:self userInfo:myDictionnary];
Thanks again !!!
EDIT 2:
- (void)updateLabel:(NSNotification*)notification
{
NSDictionary *dictionnary = (NSDictionary*)[notification userInfo];
NSLog(#"key: %#, value: %#", recapitulatif, [dictionnary objectForKey:#"recapitulatif"]);
NSLog(#"text: ", [dictionnary objectForKey:#"recapitulatif"]);
}
Give me
key: <UILabel: 0x4b2ff80; frame = (20 245; 280 133); text = 'Index du Compteur: 1 572,...'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x4b30040>>, value: (null)
and
text:
This should give me #"recapitulatif de l'installe", isn't it ?

Answer 1

From the error you posted (but not seeing more of your code, which you should also post there), it appears that you are trying to do the objectForKey method on your ThirdViewController object (which is a view controller), not the actual NSDictionary you wanted to get your object from.
Make sure dictionnary is set properly when you are calling objectForKey on it.
Do this:
NSDictionary *dictionnary = (NSDictionary*)[notification userInfo];
instead of this:
NSDictionary *dictionnary = (NSDictionary*)[notification object];
I've linked Apple's NSDictionary userInfo documentation for you.