Question

I’m a newbie to the xCode world and I had a few questions regarding my application setup.
My application a list of Authors, click on author and get author detail plus book titles, and then click on the book title and get book information, but I’m unable to figure out the show detail part.

I have established a tab view controller that displays UIViewControllers in the window.

 //create view controllers
UIViewController *vc1 = [[HomeViewController alloc] init];
UIViewController *vc2 = [[AuthorViewController alloc] init];
UIViewController *vc3 = [[BooksViewController alloc] init]; 
UIViewController *vc4 = [[GenreViewController alloc] init];
UIViewController *vc5 = [[UserViewController alloc] init];

//create instance of tab bar
self.tabBar = [[UITabBarController alloc] init];
//add views to tab bar
self.tabBar.viewControllers = [NSArray arrayWithObjects:vc1,vc2,vc3, vc4, vc5, nil];
self.window.rootViewController = self.tabBar;

//self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
//self.window.backgroundColor = [UIColor whiteColor];
[_window addSubview:_tabBar.view];
[self.window makeKeyAndVisible];
return YES;

This works perfectly. My first view “AuthorViewContoller” is a table and I can display data, however I can NOT get the detailController to show.

My AuthorViewController viewDidLoad method
– (void)viewDidLoad
{
[super viewDidLoad];

// Do any additional setup after loading the view from its nib.
self.author= [[NSArray alloc] initWithObjects:@"One", @"two", nil];

self.detailController = [[AuthorDetailController alloc] init];

and my methoddidSelectRowAtIndexPath:

if(indexPath.row == 0)
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    AuthorDetailController *dc = [[AuthorDetailController alloc] initWithNibName:@"AuthorDetailController" bundle:nil];

    dc.title = [author objectAtIndex:indexPath.row];
    [self.navigationController pushViewController:dc animated:YES];
}else{
    [self.navigationController pushViewController:detailController animated:YES];
}

I’m declaring detailController in my AuthorViewController.h file.

@property (nonatomic, retain) IBOutlet AuthorDetailController *detailController;

Answer 1

You have to actually create a UINavigationController, and have it be part of your controller hierarchy, before you can use pushViewController:animated:. You should really try setting this up in a NIB, instead of code, but in your code you can try this in place of your current vc2 initialization:

UIViewController *vc2 = [[UINavigationController alloc] initWithRootViewController:[[AuthorViewController alloc] init]];