2012-01-09 30 views
0

我尝试在dictionnary(通过槽观察员)搜索:与dictionnary和label.text未捕获的异常

NSDictionary *myDictionnary = [NSDictionary dictionaryWithObjectsAndKeys:@"details",@"details de l'installation",@"recapitulatif",@"recapitulatif de l'installe",nil]; 

...设置在标签中的文本:

NSLog(@"key: %@, value: %@", recapitulatif, [dictionnary objectForKey:@"recapitulatif"]); 
details.text = [dictionnary objectForKey:@"recapitulatif"]; 

但它使我未捕获的异常:

-[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 

感谢帮助我,我不明白我的错误

编辑:

这里是整个方法:

- (void)updateLabel:(NSNotification*)notification 
{ 
    NSDictionary *dictionnary = (NSDictionary*)[notification object]; 
    NSLog(@"key: %@, value: %@", recapitulatif, [dictionnary objectForKey:@"recapitulatif"]); 
} 

和观察者距离 “ThirdViewController” 级送:

NSDictionary *myDictionnary = [NSDictionary dictionaryWithObjectsAndKeys:@"details",@"details de l'installation",@"recapitulatif",@"recapitulatif de l'installe",nil]; 
[[NSNotificationCenter defaultCenter] postNotificationName:@"LABELUPDATENOTIFICATION" object:self userInfo:myDictionnary]; 

再次感谢!

编辑2:

- (void)updateLabel:(NSNotification*)notification 
{ 
    NSDictionary *dictionnary = (NSDictionary*)[notification userInfo]; 
    NSLog(@"key: %@, value: %@", recapitulatif, [dictionnary objectForKey:@"recapitulatif"]); 
    NSLog(@"text: ", [dictionnary objectForKey:@"recapitulatif"]); 
} 

给我

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) 

text: 

这应该给我@ “recapitulatif DE L'installe”,是不是?

回答

0

从您发布的错误(但没有看到更多的代码,你应该后出现的),看来你正在尝试做你的ThirdViewController对象的objectForKey方法(这是一个视图控制器) ,而不是实际的NSDictionary你想从你的对象。

确定dictionnary设置正确,当你打电话objectForKey就可以了。

这样做:

NSDictionary *dictionnary = (NSDictionary*)[notification userInfo]; 

,而不是这样的:

NSDictionary *dictionnary = (NSDictionary*)[notification object]; 

我已经联系苹果公司的NSDictionary userInfo文档你。

+0

OK THAKS,事实上,我必须在一个观察者中传递多个值,所以我在ThirdViewController类中做了一个字典(正如你所说的),然后通过Observer传递它。我抓住了它,我做了objectforkey(请检查最初的帖子) – clement 2012-01-09 14:32:33

+0

是的,就像我预期的那样..你分配的是错误的。我正在为你更新我的答案。 – 2012-01-09 14:34:52

+0

再次感谢,但我不明白它如何帮助我。使用你的代码我已经获得了有关应用程序的信息,但是我需要从另一个类的myDictionnary中获取激活的值: -/ – clement 2012-01-09 14:53:39