Question

I’m trying to create a transition between two scenes, this is a dumbed down version of what I have in my production code :

Both are ViewController, the left one has a TableView inside it and when clicked it should transition to the right hand scene, passing along data from whatever cell was clicked.

Currently, with a modal segue I can tap the cell and it transitions correctly, however, I can’t figure out how to place a back button onto the nav bar.

I’m transitioning from the cell to the 2nd view controller like so :

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

    [self performSegueWithIdentifier:@"toSecond" sender:self];

}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{
    if ([segue.identifier isEqualToString:@"toSecond"])
    {
        NSLog(@"Preparing segue for toSecond, setting some data on target scene");

        NSIndexPath *path = [self.theTableView indexPathForSelectedRow];
        MyData * myData = [myDataArray objectAtIndex:path.row];

        // Obtain handles on the current and destination controllers
        FirstController * startingViewController;
        SecondController * destinationController;

        startingViewController = (FirstController * ) segue.sourceViewController;
        destinationController = (SecondController * ) segue.destinationViewController;

        destinationController.someData = myData;
    }
}

On the SecondController, I’ve tried amending the viewDidLoad method to programatically include a back button item as suggested in this previous SO question:

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

    UIBarButtonItem * back = [[UIBarButtonItem alloc] initWithTitle:@"Back" 
                                                              style:UIBarButtonItemStylePlain 
                                                             target:nil 
                                                             action:nil];

    [self.navigationItem setBackBarButtonItem:back];
}

So my question is, how can I get a back button onto that nav bar? Something like this :

Thanks

Answer 1

You will not be able to add a back looking button to a modally presented ViewController easily

If you just want to add a normal button to the left side of the bar, do the following

    UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" 
style:UIBarButtonSystemItemDone target:nil action:nil];

    UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"Title"];
    item.leftBarButtonItem = rightButton;
    item.hidesBackButton = YES;
    [self.yourNavigationBar pushNavigationItem:item animated:NO];

If you insist of presenting your view modally and still want a back button style you could use
Three20