Question

Why does my UITableView not update? Here is how I am attempting to update it.

- (void)viewWillAppear:(BOOL)animated
{
    NSArray* arrValues = [self.defaults objectForKey:@"values"];
    [self.tableScores insertRowsAtIndexPaths:arrValues withRowAnimation:UITableViewRowAnimationNone];
}

arrValues is now an array of NSNumbers. I am sure that it is not empty.

Answer 1

Call [tableScores reloadData]; in - (void)viewWillAppear:(BOOL)animated

Update 1

Also, you need to define arrValues in your header. Each time the viewWillAppear, you are creating a new instance, but you won’t be able to use it throughout the rest of your controller. This is the main reason you aren’t seeing anything besides at your breakpoint.

Update 2

According to your comment below, you have not implemented cellForRowAtIndexPath: which is how the cell is created. Below is an example, but you may want to search around the net for example projects because this UITableView’s 101. There is still a lot more you need to learn when it comes to arrays and tableViews.

Example cellForRowAtIndexPath:

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

    static NSString *CellIdentifier = @"FriendCellIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }

    cell.textLabel.text = [arrValues objectAtIndex:indexPath.row];

    return cell;
}