Parse child elements with TBXML

My XML looks like this:

<root>
<sets>
    <childSets>
        <childs>
            <child>
                <childId>11</childId>
        </child>
        <child>
            <childId>22</childId>
        </child>
       开发者_StackOverflow中文版 <child>
            <childId>33</childId>
        </child>
        <child>
            <childId>44</childId>
        </child>
[...]
    </childs>
</childSets>

    <childSets>
[...]
    </childSets>
</sets>
</root>

I want to pars all childId elements of child.

Actually, the result of my parsing is just the first childId of every childs element:

[...]
do {
  if ([[TBXML elementName:element] isEqualToString:@"childSet"]) {
  [...]
        TBXMLElement *xmlChildId        = [TBXML childElementNamed:@"childId"           parentElement:child];
  [...]
  }
} while ((element = element->nextSibling));  
[...]

In this case, I just get 11. Whats wrong here?

EDIT 1:

The solution is to find the first child of the child element and to parse the next elements of this, here it is:

This code is in the do while loop of the method traverseElement

do { [...]
        if ([[TBXML elementName:element] isEqualToString:@"childSet"]) {
        //find the first child
            if ((ChildPARENTELEMENT->firstChild)) {

            while (ChildOfCHILDELEMENT!=nil) {
                NSLog(@"....");

                 ChildOfCHILDELEMENT = [TBXML nextSiblingNamed:@"childs" searchFromElement:ChildOfCHILDELEMENT];

            }
        }
    }
while((element = element->nextSibling));

The solution is to find the first child of the child element and to parse the next elements of this, here it is:

This code is in the do while loop of the method traverseElement

do { [...]
    if ([[TBXML elementName:element] isEqualToString:@"childSet"]) {
    //find the first child
        if ((ChildPARENTELEMENT->firstChild)) {

        while (ChildOfCHILDELEMENT!=nil) {
            NSLog(@"....");

             ChildOfCHILDELEMENT = [TBXML nextSiblingNamed:@"childs" searchFromElement:ChildOfCHILDELEMENT];

        }
    }
}
while((element = element->nextSibling));

You need an inner loop that goes through all the child xml elements. The childElementName:parentElement: will only return the first child with that name.

Try something like:

[...]
do {
   if ([[TBXML elementName:element] isEqualToString:@"childSet"]) {
      [...]
      TBXMLElement *xmlChildId = [TBXML childElementNamed:@"childId" 
                                            parentElement:child];
      do {
         // Do nslog or whatever else on xmlChildId
         [...]

         // Find next child element to process
         xmlChildId = [TBXML nextSiblingName:@"childId" 
                           searchFromElement:xmlChildId];
      } while (xmlChildId != nil);
   }
} while ((element = element->nextSibling));  
[...]