iPhone Landscape FAQ and Solutions

Question

There has been a lot of confusion and a set of corresponding set of questions here on SO how iPhone applications with proper handling for Landscape/Portrait mode autorotatio

Answer 1

I had an interesting requirement for ios application:

main viewController should be only landscape, but all others (which can be pushed from main) can be landscape and portrait.

Problem occours - when I push to a new viewController, which then is rotated to portraited - and the pop back - main view is no longer landscape. Also - opening application, it is not in landscape.

In order to keep main viewcontroller landscape, no matter from what orientation it was popped/pushed, I did the following thing: (in viewWillAppear:)

//set statusbar to the desired rotation position
[[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationLandscapeLeft animated:NO];

//present/dismiss viewcontroller in order to activate rotating.
UIViewController *mVC = [[[UIViewController alloc] init] autorelease];
[self presentModalViewController:mVC animated:NO];
[self dismissModalViewControllerAnimated:NO];

Hopefully it will help someone!

P.S.Tested on sdk 3.2.5 ios 5.0.1.

P.S. Thanks for all the info in this FAQ!