Question

I wish to place a screen before my curren RootViewController. So far I have made the following modification to MyAppDelegate:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //with this in the existing RootViewController loads correctly
    //self.window.rootViewController = self.navigationController; 
    self.window.rootViewController = [[[HomePageController alloc] init] autorelease];  
}

I’m not entirely sure how self.navigationController actually gets set to my RootViewController. Either way if I make the modification my HomePageController does load correctly, however I am then unable to push another view on top of it. I have a simple button on HomePageController that performs the following (note that HomePageController should load the currently named RootViewController, HomePageController is the view I want to sit above this):

RootViewController *rvC = [[[RootViewController alloc] initWithNibName:@"RootViewController" bundle:[NSBundle mainBundle]] autorelease];

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

When this code runs nothing happens… I’m not entirely sure why, possibly something related to the navigationController? Maybe I havent put HomePageController above RootViewController correctly or in the best way?

Answer 1

You have no navgiationController currently installed.
To fix you have to replace

self.window.rootViewController = [[[HomePageController alloc] init] autorelease];  

with

self.window.rootViewController = [[[UINavigatoinController alloc] initWithRootViewController:[[[HomePageController alloc] init] autorelease]] autorelease];

now you have navigationController installed and following

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

will do the right job.