问标签未在UITableView中显示

EN

-viewDidLoad {
    tbl.rowHeight = 150;
    ary = [[NSArray alloc]initWithObjects:@"asdf",@"asd",nil];
    ary2 = [[NSArray alloc]initWithObjects:@"google",@"yahoo",nil];
}

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

// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [ary count];
}

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    // Configure the cell.
    cell.textLabel.text = [ary objectAtIndex:indexPath.row];
    cell.detailTextLabel.text = [ary2 objectAtIndex:indexPath.row] ;
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
         return cell;
}