pushViewController with tableViewController in viewController

Question

I have an UIViewController, this controller is contained in a navigationController. I add an UITableViewController in this viewController. I would like to call a pushViewController method when I press on a cell of my tableView.

I tried this :

UITableViewController

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{   
  FirstView *myViewController = [[FirstView alloc] init];
  [f myViewController];
}

UIViewController (FirstView)

-(void)pushIt
{
    SecondView *sCont = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]];
    [self.navigationController pushViewController:sCont animated:YES];
    NSLog(@"didSelect"); // is printed
    [sCont release];
    sCont = nil;
}

But nothing happen. I put NSLog() to my pushIt method and I can see it. So I don't understand why I can't push it.

Any idea?

Answer 1

UIViewController has a property named navigationController that will return a UINavigationController if one exists for the view controller its called from.

Using this property, you can push view controllers onto the navigation stack from your table view's didSelectRowAtIndexPath: method.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{
    SecondView *sCont = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]];
    [self.navigationController pushViewController:sCont animated:YES];
    [sCont release];
}

The reason your current code isn't working is probably because of the following:

• You already have an instance of FirstViewController, as you said you have added a table view as its subview
• You try and create a new instance of a FirstViewController when the user taps a cell, which isn't on the navigation stack, so trying to push a view controller onto the stack from there doesn't work, because the navigationController property returns nil.