Question

I have setup a table view controller and connected a sub view so when I click on the rows the new subview appears. I followed a few tutorials step by step, but from some reason, nothing comes up when I click on the rows (the row is being selected though).

Here is my main view controller:

@interface TableViewsViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {

IBOutlet UITableView *tblSimpleTable;
IBOutlet UINavigationBar *navBar;
NSArray *arryData;
NSMutableArray *listOfItems;
}

@property (nonatomic, retain) IBOutlet UITableView *tblSimpleTable;
@property (nonatomic, retain) IBOutlet UINavigationBar *navBar;
@property (nonatomic, retain) NSArray *arryData;
@property (nonatomic, retain) NSMutableArray *listOfItems;

.m (relevant portions)

// 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: UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
}

NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Computers"];
NSString *cellValue = [array objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;

return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *) indexPath 
{

NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Computers"];
NSString *selectedCountry = [array objectAtIndex:indexPath.row];

//Initialize the detail view controller and display it.
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:[NSBundle mainBundle]];
dvController.selectedComputer = selectedCountry;
[self.navigationController pushViewController:dvController animated:YES];
dvController = nil;

}

And the subview controller:

.h

@interface DetailViewController : UIViewController {

IBOutlet UILabel *lblText;
NSString *selectedComputer;


}

@property (nonatomic, retain) IBOutlet UILabel *lblText;
@property (nonatomic, retain) NSString *selectedComputer;

@end

.m

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.

//Display the selected country.
lblText.text = selectedComputer;

//Set the title of the navigation bar
self.navigationItem.title = @"Selected Computer";

}

I am pretty sure everything is well connected in IB.

Thanks for any help!

Answer 1

Is the table view inside a navigation controller. You can put a breakpoint on

[self.navigationController pushViewController:dvController animated:YES];

and take a loot at the self.navigationController property. if it is nil, you will not be able to push anything onto it but it will not give you an error as sending a message to nil will merely return nil in most cases.