Question

Im using the following code to attempt to update several static cells in my UITableView:

- (void) viewDidAppear:(BOOL)animated{
    [self reloadTableData];
}

- (void) reloadTableData {
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    NSIndexPath *path = [NSIndexPath indexPathForRow:0 inSection:8];
    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:path];
    if ([[userDefaults objectForKey:@"canDeleteReceipts"] isEqualToString:@"0"])
    {
        cell.contentView.alpha = 0.2;
        cell.userInteractionEnabled = NO;
    }
    else 
    {
        cell.contentView.alpha = 1;
        cell.userInteractionEnabled = YES;
    }

    path = [NSIndexPath indexPathForRow:1 inSection:8];
    cell = [self.tableView cellForRowAtIndexPath:path];
    if ([[userDefaults objectForKey:@"canDeleteMileages"] isEqualToString:@"0"])
    {
        cell.contentView.alpha = 0.2;
        cell.userInteractionEnabled = NO;
    }
    else 
    {
        cell.contentView.alpha = 1;
        cell.userInteractionEnabled = YES;
    }

    path = [NSIndexPath indexPathForRow:2 inSection:8];
    cell = [self.tableView cellForRowAtIndexPath:path];
    if ([[userDefaults objectForKey:@"canDeleteAll"] isEqualToString:@"0"])
    {
        cell.contentView.alpha = 0.2;
        cell.userInteractionEnabled = NO;
        NSLog(@"%@", cell);
    }
    else 
    {
        cell.contentView.alpha = 1;
        cell.userInteractionEnabled = YES;
    }

}

However it does’t work, the code is called but does nothing. Can anyone explain how I update the attributes of a static cell to achieve something like the above when the view appears?

The NSLog statement says that the cell is null.

Thanks

Jack

Answer 1

You need to write the code in - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath instead of your reloadData method.