NSXMLParser中 didEndElement

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

    if([elementName isEqualToString:kName_Item]){
        
        [titleData addObject:currentTitleItem];
        
    }else if ([elementName isEqualToString:kName_Title]) {
        
        currentTitleItem.title = [currentString mutableCopy]; 

    } else if ([elementName isEqualToString:kName_Link]) {
        
        currentTitleItem.link = [currentString mutableCopy];
    }

 

currentTitleItem.title = [currentString mutableCopy];

 currentTitleItem.link = [currentString mutableCopy];

应该深拷贝，不然会被有bug，因为复制的时指针（right？）