XML解析器后的空Tablecell

Question

从Tablecell中的XML解析器加载数据，它工作正常。我在单元格中有自定义按钮，对于按钮操作，我再次解析另一个XML数据。问题是在按钮操作丢失了Tablecell中的所有数据之后。

//xml delegates

 - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
 {

recordResults = false;
[nodeContent setString:@""];


 if([elementName isEqualToString:@"GetLeaveSummaryResult"])
 {
    recordResults = true;

 }
recordApproveResults = false;
[nodeapprove setString:@""];
NSLog(@"the Value of Node Value: %@",nodeapprove);

if([elementName isEqualToString:@"GetLeaveApproveResult"])
{
   recordApproveResults = true;

}
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
 {
if (recordResults)
{
    [nodeContent appendString:string];
}


string=[string stringByReplacingOccurrencesOfString:@"\"" withString:@""];

nodeapprove=[string mutableCopy]; 

if (recordApproveResults)
 {
   [nodeapprove appendString:string];
     NSLog(@"the Value of Node Value condition:%@",nodeapprove);
 }

 }


 - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{

recordResults = false;

if ([elementName isEqualToString:@"GetLeaveSummaryResult"])
{
    [arrayitems addObject:nodeContent];
    NSLog(@"The Array Count is: %d",[arrayitems count]);

}

recordApproveResults = false;

if([elementName isEqualToString:@"GetLeaveApproveResult"])
   ;
 {
   NSLog(@"nodeapprove= %@",nodeapprove);

   if ([nodeapprove isEqualToString:@"Rejected"])
    {
        NSLog(@"came inside");
    }
     stringapprove= nodeapprove;
    NSLog(@"%@",stringapprove);
}

[studentTableView reloadData];


}