populate UITableView

I am struggling with a UITableView that I previously had working and somehow I have broken it! It is part of a unit in Paul Hegarty's course

The symptom is that the view loads but it is empty. I am clearly misunderstanding something fairly basic.

So far as I understand the two key methods are 1 the section rows count which in my case is returning zero, which I know is wrong!

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // #warning Incomplete method implementation. // Return the number of rows in the section. NSLog(@"TopPlaces %@",self.topPlaces); //return 100; return [self.topPlaces count]; } 

Because of the above the following method is never called because there are no rows.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 

And the second is within ViewDidLoad where I can log my data to the console and everything appears fine. i.e. my data is generated within ViewDidLoad

- (void)viewDidLoad { [super viewDidLoad]; dispatch_queue_t dowloadQueue = dispatch_queue_create("flick downloader", NULL); dispatch_async(dowloadQueue, ^{ NSArray *topPlaces = [FlickrFetcher topPlaces]; //NSLog(@"Array is %@",topPlaces); // array is OK here dispatch_async(dispatch_get_main_queue(), ^{ NSSortDescriptor *woeDescriptor = [[NSSortDescriptor alloc] initWithKey:@"_content" ascending:YES]; NSArray *woeDescriptors = @[woeDescriptor]; NSArray *sortedReturns = [topPlaces sortedArrayUsingDescriptors:woeDescriptors]; self.topPlaces = sortedReturns; //all the data is present here, count is 100 and array will log to console NSLog(@"count here is %u",[self.topPlaces count]); }); }); // Uncomment the following line to preserve selection between presentations. self.clearsSelectionOnViewWillAppear = NO; }