Question

I have tried searching up some tutorials on how to populate table views, but all I have found are old and outdated videos. I tried doing it from a slightly more recent one, and it does not work. I have

- (void)viewDidLoad
{
    [super viewDidLoad];
   [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];
    [chemarray addObject:@"2"];
    [chemarray addObject:@"test"];
    [chemarray addObject:@"3"];
    [chemarray addObject:@"science"];  
}

and

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [chemarray count];
}

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"     forIndexPath:indexPath];

     cell.textLabel.text = [chemarray objectAtIndex:indexPath.row];
    return cell;
}

according to this tutorial, when run, it should display the items in my array, but for me, it does not! Does anyone know how to fix this?

Answer 1

You forgot to register the nib/class for the cell identifier.

Form the Apple UITableView documentation:

Important: You must register a class or nib file using the
registerNib:forCellReuseIdentifier: or
registerClass:forCellReuseIdentifier: method before calling the dequeueReusableCellWithIdentifier:forIndexPath:
method.

Here is an example for a plain UITableViewCell:

- (void) viewDidLoad {
   [super viewDidLoad];

   [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];
}

If you do not register the nib/class the method dequeueReusableCellWithIdentifier:forIndexPath: is essentially the same as dequeueReusableCellWithIdentifier:. And it will not automatically create an instance for you.