NSXMLParser foundCharacters Thread 1: EXC_BAD_ACCESS (code=2, address=0x0) - parsing

Question

I am trying to implement an rss reader into a table inside a container. I have the code of the parser in an other project and in the specific project it works fine without any error. I copied every file, 4 files exactly as they are in the other project and i copied also the view controllers into my storyboard so they are exactly the same. But when i run the code i get an error!
here is a pic with my error.
I don't know why is this happening. In the other project which has only two view controllers with the table view and the web view it works fine. But when i try to copy every file as it is into my other project I get this error.
This is my .m file
#import "APPMasterViewController.h"
#import "APPDetailViewController.h"
#interface APPMasterViewController () {
NSXMLParser *parser;
NSMutableArray *feeds;
NSMutableDictionary *item;
NSMutableString *title;
NSMutableString *link;
NSString *element;
}
#end
#implementation APPMasterViewController
(void)awakeFromNib {
[super awakeFromNib];
}
- (void)viewDidLoad {
[super viewDidLoad];
feeds = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://radioevros.gr/feed/"];
parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
[parser setDelegate:self];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return feeds.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [[feeds objectAtIndex:indexPath.row] objectForKey: #"title"];
return cell;
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI: (NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc] init];
title = [[NSMutableString alloc] init];
link = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[feeds addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if ([element isEqualToString:#"title"]) {
[title appendString:string];
} else if ([element isEqualToString:#"link"]) {
[link appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *string = [feeds[indexPath.row] objectForKey: #"link"];
[[segue destinationViewController] setUrl:string];
}
}
-(void) viewDidUnload{
[element release];
element = nil;
[super viewDidUnload];
}
- (void)dealloc {
[element release];
[super dealloc];
}
#end

Answer 1

I can't say for certain since I haven't tried running your code, but you may want to try to store element using element = [elementName copy]; instead and see if that gets rid of the exception.
My guess is that elementName gets deallocated after you exit the method since it is only a local parameter variable.
As a side note, it appears that you are doing manual memory management. I highly suggest that you convert your project to use ARC since it not only streamlines memory management, it is also what Apple has been recommending to use for quite a while now.