iOS NSXmlParser error

[leconteconte]

Hi
want to tell you that i'm a beginner so be ...
i want to parse this XML File to get their tag and attributs

<commands>
   <command id="84" crypt="0">
  <NbreSecEnCours>2</NbreSecEnCours>
  <IdSession NomAppli="Notepad" NameMach="T2037" GuidSession="12729c94-1bf6-49ac-beca-e3c99609aded">2</IdSession>
  <IdSession NomAppli="nslookup" NameMach="T2037" GuidSession="12729c94-1bf6-49ac-beca-e3c99609aded">2</IdSession>
  </command>
  </commands>

that is why i try to do that. that is my class for parsing the previous XML file

//--------------------------------------------------------------------
// Start of element
- (void)parser:(NSXMLParser *)parser
didStartElement:(NSString *)elementName
  namespaceURI:(NSString *)namespaceURI
 qualifiedName:(NSString *)qName
    attributes:(NSDictionary *)attributeDict
{
    currentElement = [elementName copy];
    //currentElement = [attributeDict copy];
    //NSLog(@"%@", currentElement);
      item2 = [[NSMutableDictionary alloc]init];
    
      item = [[NSMutableDictionary alloc]init];
    
    if ([elementName isEqualToString:@"command"]) {
        
        //item utilisé pour le stockage du  nombre de session
     
        
        //currentNode = [[NSMutableString alloc]init];
        
        //Récupération du numéro de la requete
        
    NSLog(@"id = %@",[attributeDict objectForKey:@"id"]);
    currentNbreSecEnCours = [[NSMutableString alloc]init];
    currentIdSession = [[NSMutableString alloc]init];
    [item setObject:currentNbreSecEnCours forKey:@"NbreSecEnCours"];
      
   
    [commandes addObject:item];
    //[commandes addObject:item2];
        XMLItems = [[NSMutableDictionary alloc]init];
        
    }
     
    if([elementName isEqualToString:@"IdSession"]){
        
              
        //[item2 setObject:currentIdSession forKey:@"IdSession"];

        
       NomAppli = [attributeDict objectForKey:@"NomAppli"];
       NameMach = [attributeDict objectForKey:@"NameMach"];
       GuidSession = [attributeDict objectForKey:@"GuidSession"];
        [item2 setObject:NomAppli forKey:@"NomAppli"];
        [item2 setObject:NameMach forKey:@"NameMach"];
        [item2 setObject:GuidSession forKey:@"GuidSession"];
        [commandes addObject:item2];
        /*[commandes addObject:NomAppli];
        [commandes addObject:NameMach];
        [commandes addObject:GuidSession];*/
        NSLog(@"[didStartElement]commandes: %@",commandes);
    }
    

}

// Found Character
- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
  
    if ([currentElement isEqualToString:@"NbreSecEnCours"]) {
        [currentNbreSecEnCours appendString:string];
        NSLog(@"currentNbreSecEncours: %@", currentNbreSecEnCours);
    }
    if ([currentElement isEqualToString:@"IdSession"]) {
        [currentIdSession appendFormat:string];
        NSLog(@"currentIdSession:  %@", currentIdSession);
       
    }
}

// End Element
- (void) parser:(NSXMLParser *)parser
  didEndElement:(NSString *)elementName
   namespaceURI:(NSString *)namespaceURI
  qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
   if ([elementName isEqualToString:@"command"]) {
        //[item setObject:currentNode forKey:@"Username"];
        [item setObject:currentNbreSecEnCours forKey:@"NbreSecEnCours"];
        [commandes addObject:item];
    }
    if([elementName isEqualToString:@"IdSession"]){
        [item2 setObject:currentIdSession forKey:@"IdSession"   ];
        NomAppli = [attributeDict objectForKey:@"NomAppli"];
        NameMach = [attributeDict objectForKey:@"NameMach"];
        GuidSession = [attributeDict objectForKey:@"GuidSession"];
        
      
        NSLog(@"[didEndElement]commandes: %@",commandes);
    }
}

//------------------------------------------------------------------
//-(NSString*)getElementValue:(NSString*)Node{
-(NSMutableArray*)getElementValue{
    //NSString *nodeValue;
    NSString *nbreSess;
    NSString *idSession;
    NSString *nomAppli;
    NSString *nameMach;
    NSString *guidSession;
    NSMutableArray *results = [[NSMutableArray alloc]init];
    
    
    NSLog(@"Commande=> %@",commandes);
    
    for (NSMutableDictionary *val in commandes) {
       
        nbreSess = [val objectForKey:@"NbreSecEnCours"];
        nbreSess = [nbreSess stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        nbreSess = [nbreSess stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        [results addObject:nbreSess];
        
        
        
        idSession = [val objectForKey:@"IdSession"];
        idSession = [idSession stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        idSession = [idSession stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        [results addObject:idSession];

        
        
      nomAppli = [val objectForKey:@"NomAppli"];
       nomAppli = [nomAppli stringByReplacingOccurrencesOfString:@"\n" withString:@""];
       nomAppli = [nomAppli stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        [results addObject:nomAppli];

        
        nameMach = [val objectForKey:@"NameMach"];
        nameMach = [nameMach stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        nameMach = [nameMach stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        [results addObject:nameMach];
        
        
        
        guidSession = [val objectForKey:@"GuidSession"];
        guidSession = [guidSession stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        guidSession = [guidSession stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        [results addObject:guidSession];
        
    
       
        
    }
    NSLog(@"Results=> %@",results);
    //return nodeValue;
    //return commandes;
    return results;
}

But in console i have this error and i'm not understand Why and how to do to resolve it

2013-02-28 09:12:45.535 XMLTesteur-1.1[666:11303] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:
(0x1ca0012 0x10dde7e 0x1c53b6a 0x1c53a20 0x85d7 0x561f 0x5a7e 0x10f1705 0x28920 0x288b8 0xe9671 0xe9bcf 0xe8d38 0x5833f 0x58552 0x363aa 0x27cf8 0x1bfbdf9 0x1bfbad0 0x1c15bf5 0x1c15962 0x1c46bb6 0x1c45f44 0x1c45e1b 0x1bfa7e3 0x1bfa668 0x2565c 0x233d 0x2265)
libc++abi.dylib: terminate called throwing an exception
(lldb)

thanks

 

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Set break points. Step through your code and find where that exception is being thrown.

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[leconteconte]

Thanks for idea now i have this problem
that is the method where my is the crach

-(NSMutableArray*)getElementValue{
    //NSString *nodeValue;
    NSString *nbreSess;
    NSString *idSession;
    NSString *nomAppli;
    NSString *nameMach;
    NSString *guidSession;
    NSMutableArray *results = [[NSMutableArray alloc]init];
    
    
    
    
    NSLog(@"Commandes=> %@",commandes);
    //
    for (NSMutableDictionary *val in commandes) {
       
        nbreSess = [val objectForKey:@"NbreSecEnCours"];
      
        nbreSess = [nbreSess stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        nbreSess = [nbreSess stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        NSLog(@"Nbre sess :=> %@",nbreSess);
        [results addObject:nbreSess];
        
    }
     for (NSMutableDictionary *val in commandes) {
       nomAppli = [val objectForKey:@"NomAppli"];
       nomAppli = [nomAppli stringByReplacingOccurrencesOfString:@"\n" withString:@""];
       nomAppli = [nomAppli stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        NSLog(@"NomAppli :=> %@",nomAppli);
       [results addObject:nomAppli];

        
        nameMach = [val objectForKey:@"NameMach"];
        nameMach = [nameMach stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        nameMach = [nameMach stringByReplacingOccurrencesOfString:@"\t" withString:@""];
         NSLog(@"Name Mach :=> %@",nameMach);
        [results addObject:nameMach];
        
        
        
        guidSession = [val objectForKey:@"GuidSession"];
        guidSession = [guidSession stringByReplacingOccurrencesOfString:@"\n" withString:@""];
        guidSession = [guidSession stringByReplacingOccurrencesOfString:@"\t" withString:@""];
        NSLog(@"GuidSession :=> %@",guidSession);
        [results addObject:guidSession];
        
     
       
        
    }
    NSLog(@"Results=> %@",results);
    //return nodeValue;
  //  return commandes;
    return results;
}

i think that the problem is the manner that i use to get the data inside de dictionnary because the log give me :

2013-02-28 12:57:22.796 XMLTesteur-1.1[1836:11303] Nbre sess :=> 2
2013-02-28 12:57:22.797 XMLTesteur-1.1[1836:11303] Nbre sess :=> (null)

that is my dictionnary where i want to get the value inside :

Commandes=> (
        {
        NbreSecEnCours = 2;
    },
        {
        GuidSession = "12729c94-1bf6-49ac-beca-e3c99609aded";
        NameMach = T2037;
        NomAppli = Notepad;
    },
        {
        GuidSession = "12729c94-1bf6-49ac-beca-e3c99609aded";
        NameMach = T2037;
        NomAppli = nslookup;
    }
)

how can i do to get the different key and value inside the dictionnary ???
"NbreSecEnCours", "GuidSession" etc...