Question

This is my code to populate UITableView, very very simple:

file .h

@interface ViewController: UIViewController {
    IBOutlet UITableView *table;
    NSMutableArray *array1;
    NSString *string1
}

file .m

- (void)viewDidLoad
{
    [super viewDidLoad];
    array1 = [[NSMutableArray alloc] initWithObjects: @"1", @"2", @"3", @"4", nil];

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return array1.count; // <------- here there is the problem with iOS 5.1, also [array1 count]
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 20;
}

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

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

    cell.textLabel.backgroundColor = [UIColor clearColor];
    cell.detailTextLabel.backgroundColor = [UIColor clearColor];

    cell.textLabel.text = [NSString stringWithFormat:@" %@",[array1 objectAtIndex:indexPath.row]];
    cell.textLabel.font = [UIFont systemFontOfSize:13];
    cell.textLabel.textColor = [UIColor blackColor];

    return cell;
}

Well, in iOS 6 (simulator and real device) its all right, UITableView loads and shows all rows of array1 objects; in iOS 5.1 (simulator and real device) it doesnt crash but UITableView is empty, no rows showed (Header and Footer are attached), and I’have noticed this could be a problem with the numberOfRowsInSection: array1.count method, I think in iOS 5.1 it doesnt recognize the right number of rows. Please, what’s the best way to write a code compatible with iOS 5.1 and iOS6?

Answer 1

After populating the array1 do

[self.tableView reloadData];

Since I think the data is not available when the tableview is loaded. And this could be different between iOS 5 and 6.