Using two view controllers, second one won't display views - ios

Question

For some reason I'm having trouble displaying a view from a secondary view controller in my application.
My main view controller calls another view controller that's responsible for loading a pdf view.
The code in MainViewController looks like this:
- (int)openPDF
{
[self loadSettingsWithDefaults];
RDPDFViewController *m_pdf;
if( m_pdf == nil )
{
m_pdf = [[RDPDFViewController alloc] initWithNibName:#"RDPDFViewController"bundle:nil];
}
int result = [m_pdf PDFOpen:#"/Users/steve/test.pdf" withPassword:#""];
if(result == 1)
{
m_pdf.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:m_pdf animated:YES];
}
return result;
}
This code is located in the second view. This is the method referred to above in MainViewController.
- (int)PDFOpen:(NSString *)path withPassword:(NSString *)pwd {
[self PDFClose];
PDF_ERR err = 0;
m_doc = [[PDFDoc alloc] init]; err = [m_doc open:path :pwd]; switch( err )
{
case err_ok: break;
case err_password: return 2;
break; default: return 0;
}
CGRect rect = [[UIScreen mainScreen]bounds];
//GEAR
if (![self isPortrait] && rect.size.width < rect.size.height) { float height = rect.size.height;
rect.size.height = rect.size.width;
rect.size.width = height;
}
//END
if(SYS_VERSION>=7.0) {
m_view = [[PDFView alloc] initWithFrame:CGRectMake(0, 0, rect.size.width, rect.size.height)]; }
else
{
m_view = [[PDFView alloc] initWithFrame:CGRectMake(0, 0, rect.size.width, rect.size.height-20-44)];
}
[m_view vOpen :m_doc :(id<PDFViewDelegate>)self];
pagecount = [m_doc pageCount];
[self.view addSubview:m_view];
return 1; }
When the code executes, I know the view object is being created as I can see debug output coming from it in the console. However it will not display the new view in the iPhone simulator.
Feel free to provide feedback--just remember this is my first StackOverflow post! I'll be happy to provide more info as needed.

Answer 1

My main view controller was set to be the root view controller for my application. I had to set the navigation controller to be the root view controller, and then add the other view controllers after that.
After that I told navController to pop to the root view controller.
navController = [[UINavigationController alloc] initWithRootViewController:mainViewController];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
[navController setNavigationBarHidden:YES];
[navController popToRootViewControllerAnimated:YES];