ios - Getting data of Child Element from its Parent counterpart -

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im trying parse child data sub_category , show it, show relevant sub_category of parent category. sucessful in parsing data of parent element im having problem on how parse child element.

- (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     if([elementname isequaltostring:@"category"]){         datacurrent = [datafileholder alloc];     } } - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string {      currentlist  = [[nsmutablestring alloc] initwithstring:[string stringbytrimmingcharactersinset:[nscharacterset whitespaceandnewlinecharacterset]]];  } - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {      if([elementname isequaltostring:@"name"]){         datacurrent.nameofcat = currentlist;     }     if ([elementname isequaltostring:@"description"]){         datacurrent.descriptionofcat = currentlist;     }     if ([elementname isequaltostring:@"image"]) {         datacurrent.imagelink = currentlist;     }     if ([elementname isequaltostring:@"category"]) {         [listpopulated addobject:datacurrent];         datacurrent = nil;         currentlist = nil;     } }

and xml file this

<category>         <name>food</name>         <description>food description</description>         <image> link here </image>             <sub_cat>                 <sub_name>sub name</sub_name>                 <sub_desc>sub cat description</sub_desc>                 <sub_image> link </sub_image>             </sub_cat>             <sub_cat>                 <sub_name>sub name</sub_name>                 <sub_desc>sub cat description</sub_desc>                 <sub_image> link </sub_image>             </sub_cat> </category>

and been researching event driven xml parsing , find gud reference 1 of threads xml-parse-only-certain-child-elements, @ end im still pretty confuse xml , parsing stuff. might need lamer term. , know on how parsing part.

i hope can use ios native xml parser itself. xml looks pretty simple handle. try create dictionary each node , put in array. array of dictionaries can iterate data.

create nsmutablearray *dataarray & nsmutabledictionary *datadict & nsmutabledictionary *subcatdict nsmutablearray *subcatarray, have 1 nsstring in .h file named currentelement.

- (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     currentelement = elementname;     if([elementname isequaltostring:@"category"]){         datadict = [[nsmutabledictionary alloc] init];     }     else if ([elementname isequaltostring:@"sub_cat"]) {         if(!subcatarray) {              subcatarray = [[nsmutablearray alloc] init];         }         subcatdict = [[nsmutabledictionary alloc] init];     } }  - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string {     if(datadict && !subcatarray){         [datadict setobject:string forkey:currentelement];     }     else if(subcatarray && subcatdict) {         [subcatdict setobject:string forkey:currentelement];     } }  - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {     if([elementname isequaltostring:@"category"]){         [datadict setobject:subcatarray forkey:@"sub_cat"];         [dataarray addobject:datadict];         subcatarray = nil;         datadict = nil;     }     else if([elementname isequaltostring:@"sub_cat"]){         [subcatarray addobject:subcatdict];         subcatdict = nil;     } }

this out.


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