Question

I’m having trouble trying to populate a UITableView with the results of a network request. It seems that my code is alright as it works perfectly when my network is speedy, however, when it’s not, the function
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath- still executes, which results in a bad access error. I presume that this is because the array that the aforesaid function attempts to utilize has not been populated. This brings me to my question: Is there anyway that I can have the UITableView delegate methods delayed to avoid this?

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"AlbumsCell";
//UITableViewCell *basicCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

AlbumsCell *cell = (AlbumsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (!cell) {
    **// Here is where the Thread 1: EXC_BAD_ACCESS (code=2 address=0x8)**
    cell = [[[AlbumsCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}

    Album *album = [_albums objectAtIndex:[indexPath row]];
    [cell setAlbum:album];

return cell;
}

Answer 1

Modify your delegate methods to handle the network request for ‘in progress’ status as well. And once the you get your response, call the reloadData on tableview which will reload the table with proper data.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"AlbumsCell";
//UITableViewCell *basicCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    AlbumsCell *cell = (AlbumsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (!cell) {
        **// Here is where the Thread 1: EXC_BAD_ACCESS (code=2 address=0x8)**
        cell = [[[AlbumsCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }

    if ((_albums) && ([_albums count] > [indexPath row])) {
        Album *album = [_albums objectAtIndex:[indexPath row]];
        [cell setAlbum:album];
    } else {
    //show some loading message in the cell
    }

    return cell;
    }