Loading data into UITableview using GCD - uitableview

Question

The code below loads data into a UITableView by getting a google news RSS feed parsing the XML and putting it into the view . It works but when i push another view and come back the table view scroll is broken . I have isolated the problem to the GCD code . If i remove it the problem disappears . So here is the GCD code :
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"View did load ..");
self.title = #"News stories";
NewsItem *item = [[NewsItem alloc] init];
item.title = #"Loading ...";
self.newsItems = [#[item] mutableCopy];
NSString *URL = #"http://news.google.com/news?q=apple+OR+google+OR+microsoft&output=rss";
NSURL *xmlURL = [NSURL URLWithString:URL];
NSURLRequest *request = [NSURLRequest requestWithURL:xmlURL];
Parser *parser = [[Parser alloc] initXMLParser];;
dispatch_queue_t downloadQueue = dispatch_queue_create("news downloader", NULL);
dispatch_async(downloadQueue, ^{
BOOL success;
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
if (data != nil) {
NSXMLParser *nsXmlParser = [[NSXMLParser alloc] initWithData:data];
// create and init our delegate
// set delegate
[nsXmlParser setDelegate:parser];
// parsing...
success = [nsXmlParser parse];
}
else {
success = FALSE;
}
// test the result
dispatch_async(dispatch_get_main_queue(), ^{
if (success) {
NSLog(#"reloading data ...");
self.newsItems = [parser.newsItems copy];
[self.tableView reloadData];
} else {
NewsItem *item = [[NewsItem alloc] init];
item.title = #"Error loading";
self.newsItems = [#[item] mutableCopy];
[self.tableView reloadData];
NSLog(#"Error parsing document!");
}
});
});
}

Answer 1

Try [self.tableView reloadData]; in viewDidAppear.